Home
Alex Christian Hoffmann's picture
  • E-mailAlex.Hoffmann@uib.no
  • Phone+47 55 58 28 76
  • Visitor Address
    Allegt. 55
  • Postal Address
    Postboks 7803
    5020 BERGEN
Academic article
  • Svensen, Ellinor Arguilla; Hoffmann, Alex Christian. 2020. First and second-order models for the vortex length in cylinder-on-cone cyclones based on large-eddy simulations. Heliyon. 9 pages.
  • Hoffmann, Alex Christian. 2020. A note on the multiphase balance equations. Powder Technology. 145-148.
  • Hoffmann, Alex Christian; Heggland, Åshild Skorpen; Chang, Yu-Fen. 2019. Positron emission particle tracking and CFD investigation of hydrocyclones acting on liquids of varying viscosity. Chemical Engineering Science. 310-319.
  • Hoffmann, Alex Christian; Pletten, Sandra Stang; Mania, Mirko. 2019. A study of transfer rates of phenols from caustic to crude oil. Separation and Purification Technology. 515-519.
  • Dries, Huub; Hoffmann, Alex Christian. 2019. A correlation giving improved description of the capacity and efficiency of vane-type gas-liquid separators. AIChE Journal.
  • Ghaffari, Maryam; Hoffmann, Alex Christian; Skjold, Trygve; Eckhoff, Rolf Kristian; van Wingerden, Kees. 2019. A brief review on the effect of particle size on the laminar burning velocity of flammable dust: application in a CFD tool for industrial applications. Journal of Loss Prevention in the Process Industries. 1-6.
  • Suciu, C.; Dorolti, E.; Hoffmann, Alex Christian. 2018. Physico-chemical properties of nanocrystalline YSZ powders as a function of doping level and electrical properties after sintering. Materials Science for Energy Technologies. 136-145.
  • Rubio, Diego ; Suciu, C.; Warnhus, I.; Vik, A.; Hoffmann, Alex Christian. 2017. Tape Casting of Lanthanum Chromite for Solid Oxide Fuel Cell Interconnects. Journal of Materials Processing Technology. 270-279.
  • Thambiraj, Nelson; Suciu, C.; Warnhus, I.; Vik, A.; Hoffmann, Alex Christian. 2017. SOFC Cathode Degradation due to Salt Contamination. ECS Transactions. 915-925.
  • Karakitsiou, Stamatina; Holst, Bodil; Hoffmann, Alex Christian. 2017. Pressure-Driven Gas Flow through Nano-Channels at High Knudsen Number. Journal of Nano Research. 116-127.
  • Balakin, Boris; Adamsen, Tom Christian Holm; Chang, Yu-Fen; Kosinski, Pawel Jan; Hoffmann, Alex Christian. 2017. Non-invasive studies of multiphase flow in process equipment. Positron emission particle tracking technique. Journal of Physics: Conference Series. 1-7.
  • Thambiraj, Nelson; Suciu, C.; Warnhus, I.; Vik, A.; Hoffmann, Alex Christian. 2017. Effect of Oxygen Depletion to the Cathode on the Working of Solid Oxide Fuel Cells. ECS Transactions. 875-887.
  • Balakin, Boris; Lo, Simon; Kosinski, Pawel Jan; Hoffmann, Alex Christian. 2016. Modelling agglomeration and deposition of gas hydrates in industrial pipelines with combined CFD-PBM technique. Chemical Engineering Science. 45-57.
  • Karakitsiou, Stamatina; Holst, Bodil; Hoffmann, Alex Christian. 2016. Apparatus for measuring pressure-driven transport through channels at high Knudsen numbers. Review of Scientific Instruments.
  • Hellestø, Aslak Solvang; Ghaffari, Maryam; Balakin, Boris; Hoffmann, Alex Christian. 2016. A parametric study of cohesive particle agglomeration in a shear flow : numerical simulations by the discrete element method. Journal of Dispersion Science and Technology. 611-620.
  • Chang, Yu-Fen; Hoffmann, Alex Christian. 2015. A Lagrangian study of liquid flow in a reverse-flow hydrocyclone using positron emission particle tracking. Experiments in Fluids.
  • Marthinussen, Svein-Arne; Chang, Yu-Fen; Balakin, Boris V; Hoffmann, Alex Christian. 2014. Removal of particles from highly viscous liquids with hydrocyclones. Chemical Engineering Science. 169-175.
  • Sæthre, Bjørn Steen; Hoffmann, Alex Christian; Spoel, David van der. 2014. Order Parameters and Algorithmic Approaches for Detection and Demarcation of Interfaces in Hydrate−Fluid and Ice−Fluid Systems. Journal of Chemical Theory and Computation. 5606-5615.
  • Balakin, Boris V; Hoffmann, Alex Christian; Kosinski, Pawel Jan. 2014. Coupling STAR-CD with a population-balance technique based on the classes method. Powder Technology. 47-54.
  • Kosinski, Pawel Jan; Balakin, Boris V; Middha, Prachi; Hoffmann, Alex Christian. 2014. Collisions between particles in multiphase flows: Focus on contact mechanics and heat conduction. International Journal of Heat and Mass Transfer. 674-687.
  • Chang, Yu-Fen; Adamsen, Tom Christian; Pisarev, Gleb; Hoffmann, Alex Christian. 2013. PEPT: an invaluable tool for 3-D particle tracking and CFD simulation verification in hydrocyclone studies. The European Physical Journal Conferences. 8 pages.
  • Middha, Prachi; Balakin, Boris V; Leirvåg, Line Kristin; Hoffmann, Alex Christian; Kosinski, Pawel Jan. 2013. PEPT - A novel tool for investigation of pneumatic conveying. Powder Technology. 87-96.
  • Balakin, Boris V; Alyaev, Sergey; Hoffmann, Alex Christian; Kosinski, Pawel Jan. 2013. Micromechanics of agglomeration forced by the capillary bridge: The restitution of momentum. AIChE Journal. 4045-4057.
  • Kosinski, Pawel Jan; Balakin, Boris V; Middha, Prachi; Hoffmann, Alex Christian. 2013. Heat conduction during collisions of cohesive and viscoelastic particles. International Journal of Heat and Mass Transfer. 107-116.
  • Chang, Yu-Fen; Adamsen, Tom Christian; Hoffmann, Alex Christian. 2012. Using a PET Camera to Track Individual Phases in Process Equipment with High Temporal and Spatial Resolutions: Algorithm Development. IEEE Instrumentation and Measurement Technology Conference. Proceedings. 2326-2330.
  • Balakin, Boris V; Notøy, Iryna; Hoffmann, Alex Christian; Kosinski, Pawel Jan. 2012. The formation of deposit in a magnetic fluid: Numerical and experimental study. Powder Technology. 108-114.
  • Balakin, Boris V; Hoffmann, Alex Christian; Kosinski, Pawel Jan. 2012. The collision efficiency in a shear flow. Chemical Engineering Science. 305-312.
  • Sæthre, Bjørn Steen; van der Spoel, David; Hoffmann, Alex Christian. 2012. Free energy of separation of structure II clathrate hydrate in water and a light oil. Journal of Physical Chemistry B. 5933-5940.
  • Pisarev, Gleb; Gjerde, Vidar; Balakin, Boris V; Hoffmann, Alex Christian; Dijkstra, Henk A.; Peng, Weiming. 2012. Experimental and computational study of the "end of the vortex" phenomenon in reverse-flow centrifugal separators. AIChE Journal. 1371-1380.
  • Pisarev, Gleb; Hoffmann, Alex Christian. 2012. Effect of the 'end of the vortex' phenomenon on the particle motion and separation in a swirl tube separator. Powder Technology. 101-107.
  • Ghaffari, Maryam; Vestvik, Anders; Balakin, Boris V; Hoffmann, Alex Christian. 2012. Deposition capabilities of turbulent particle-laden flow passing an obstacle using experiment and CFD. AIP Conference Proceedings. 217-219.
  • Ghaffari, Maryam; Chang, Yu-Fen; Balakin, Boris V; Hoffmann, Alex Christian. 2012. CFD Modeling of PEPT Results of Particle Motion Trajectories in a Pipe over an Obstacle. AIP Conference Proceedings. 193-196.
  • Chang, Yu-Fen; Ilea, Catalin Grigore; Aasen, Øystein Lee; Hoffmann, Alex Christian. 2011. Particle flow in a hydrocyclone investigated by positron emission particle tracking. Chemical Engineering Science. 4203-4211.
  • Ilea, Catalin Grigore; Kosinski, Pawel Jan; Hoffmann, Alex Christian. 2011. Numerical study on the dynamics of a jet-vortex interaction. Applied Mathematics and Computation. 5103-5112.
  • Chang, Yu-Fen; Pisarev, Gleb; Hoffmann, Alex Christian. 2011. Numerical Study of the "End of the Vortex" Phenomenon in a Hydrocyclone Separator. AIP Conference Proceedings. 183-186.
  • Pisarev, Gleb; Hoffmann, Alex Christian; Peng, Weiming; Dijkstra, Henk A. 2011. Large Eddy Simulation of the vortex end in reverse-flow centrifugal separators. Applied Mathematics and Computation. 5016-5022.
  • Kosinski, Pawel Jan; Hoffmann, Alex Christian. 2011. Extended hard-sphere model and collisions of cohesive particles. Physical Review E. Statistical, Nonlinear, and Soft Matter Physics.
  • Balakin, Boris V; Hoffmann, Alex Christian; Kosinski, Pawel Jan. 2011. Experimental study and computational fluid dynamics modeling of deposition of hydrate particles in a pipeline with turbulent water flow. Chemical Engineering Science. 755-765.
  • Tikkanen, Hanna-Mari Viktoria; Suciu, Crina S.; Wærnhus, Ivar; Hoffmann, Alex Christian. 2011. Examination of the co-sintering process of thin 8YSZ films obtained by dip-coating on in-house produced NiO-YSZ. Journal of the European Ceramic Society. 1733-1739.
  • Tikkanen, Hanna-Mari Viktoria; Suciu, Crina S.; Wærnhus, Ivar; Hoffmann, Alex Christian. 2011. Dip-coating of 8YSZ nanopowder for SOFC applications. Ceramics International. 2869-2877.
  • Pisarev, Gleb; Hoffmann, Alex Christian. 2011. Certainties and uncertainties in CFD prediction of the end of the vortex behaviour in centrifugal separators. AIP Conference Proceedings. 135-138.
  • Balakin, Boris V; Notøy, Iryna; Hoffmann, Alex Christian; Kosinski, Pawel Jan. 2011. CFD model for the magnetically forced formation of an obstructive deposit in a magnetorheological fluid. AIP Conference Proceedings. 110-113.
  • Balakin, Boris V; Hoffmann, Alex Christian; Kosinski, Pawel Jan; Høiland, Sylvi. 2010. Turbulent flow of hydrates in a pipeline of complex configuration. Chemical Engineering Science. 5007-5017.
  • Balakin, Boris V; Pedersen, Håkon; Kilinc, Ziya; Hoffmann, Alex Christian; Kosinski, Pawel Jan; Høiland, Sylvi. 2010. Turbulent flow of freon R11 hydrate slurry. Journal of Petroleum Science and Engineering. 177-182.
  • Ho, Thinh Xuan; Kosinski, Pawel Jan; Hoffmann, Alex Christian; Vik, Arild. 2010. Transport, chemical and electrochemical processes in a planar SOFC: Detailed three-dimensional modeling. Journal of Power Sources. 6764-6773.
  • Peng, Weiming; Christensen, Dorthe; Jacobsson, Siri; Kvinnesland, Eli; Hoffmann, Alex Christian. 2010. Studies of the flow in and around gas dedusters and demisters using neutrally buoyant tracer. Chemical Engineering Journal. 11-18.
  • Kosinski, Pawel Jan; Hoffmann, Alex Christian. 2010. Quantification of the adhesive impulse for the extended hard-sphere model. AIP Conference Proceedings. 163-166.
  • Balakin, Boris V; Hoffmann, Alex Christian; Kosinski, Pawel Jan. 2010. Population Balance Model for Nucleation, Growth, Aggregation, and Breakage of Hydrate Particles in Turbulent Flow. AIChE Journal. 2052-2062.
  • Balakin, Boris V; Hoffmann, Alex Christian; Kosinski, Pawel Jan; Rhyne, Lee D. 2010. Eulerian-Eulerian CFD model for the sedimentation of spherical particles in suspensions with high particle concentrations. Engineering Applications of Computational Fluid Mechanics. 116-126.
  • Ho, Thinh Xuan; Kosinski, Pawel Jan; Hoffmann, Alex Christian; Vik, Arild. 2010. Effects of heat sources on the performance of a planar solid oxide fuel cell. International journal of hydrogen energy. 4276-4285.
  • Balakin, Boris V; Hoffmann, Alex Christian; Kosinski, Pawel Jan; Istomin, V.A.; Chuvilin, E.M. 2010. Combined CFD/Population Balance Model for gas hydrate particle size prediction in turbulent pipeline flow. AIP Conference Proceedings. 151-154.
  • Kosinski, Pawel Jan; Hoffmann, Alex Christian. 2010. An extension of the hard-sphere particle-particle collision model to study agglomeration. Chemical Engineering Science. 3231-3239.
  • Ilea, Catalin Grigore; Kosinski, Pawel Jan; Hoffmann, Alex Christian. 2009. The effect of polydispersity on dust lifting behind shock waves. Powder Technology. 194-201.
  • Mæland, Dagfinn; Suciu, Crina S.; Wærnhus, Ivar; Hoffmann, Alex Christian. 2009. Sintering of 4YSZ (ZrO2+4 mol% Y2O3) nanoceramics for solid oxide fuel cells (SOFCs), their structure and ionic conductivity. Journal of the European Ceramic Society. 2537-2547.
  • Kosinski, Pawel Jan; Kosinska, Anna; Hoffmann, Alex Christian. 2009. Simulation of solid particles behaviour in a driven cavity flow. Powder Technology. 327-339.
  • Suciu, Crina S.; Vik, Arild; Goga, Firuta; Dorolti, Eugen; Tetean, Romulus; Hoffmann, Alex Christian. 2009. Physico-chemical characterization of 8ysz nanoparticles by modified sol-gel method. Studia Universitatis Babeş-Bolyai Chemia.. 261-272.
  • Ho, Thinh Xuan; Kosinski, Pawel Jan; Hoffmann, Alex Christian; Vik, Arild. 2009. Numerical analysis of a planar anode-supported SOFC with composite electrodes. International journal of hydrogen energy. 3488-3499.
  • Suciu, Crina S.; Erichsen, Egil Severin; Hoffmann, Alex Christian; Dorolti, Eugen; Tetean, Romulus. 2009. Modified sol-gel method used for obtaining SOFC electrolyte materials. ECS Transactions. 1679-1686.
  • Ho, Thinh Xuan; Kosinski, Pawel Jan; Hoffmann, Alex Christian; Vik, Arild. 2009. Modeling of transport, chemical and electrochemical phenomena in a cathode-supported SOFC. Chemical Engineering Science. 3000-3009.
  • Pisarev, Gleb; Hoffmann, Alex Christian; Peng, Weiming; Dijkstra, Henk A. 2009. Large eddy simulation of the vortex end in reverse-flow centrifugal separators. AIP Conference Proceedings. 641-644.
  • Ilea, Catalin Grigore; Kosinski, Pawel Jan; Hoffmann, Alex Christian. 2009. Jet-vortex interaction: a numerical study. AIP Conference Proceedings. 617-620.
  • Asserson, Ragnhild Brandsæter; Hoffmann, Alex Christian; Høiland, Sylvi; Asvik, Kjell M. 2009. Interfacial tension measurement of freon hydrates by droplet deposition and contact angle measurements. Journal of Petroleum Science and Engineering. 209-217.
  • Kosinski, Pawel Jan; Hoffmann, Alex Christian. 2009. Extension of the hard-sphere particle-wall collision model to account for particle deposition. Physical Review E. Statistical, Nonlinear, and Soft Matter Physics. 061302.
  • Ho, Thinh Xuan; Kosinski, Pawel Jan; Hoffmann, Alex Christian; Vik, Arild. 2009. Detailed modeling of an anode-supported solid oxide fuel cell using a fully three-dimensional approach. ECS Transactions. 1231-1240.
  • Ilea, Catalin Grigore; Kosinski, Pawel Jan; Hoffmann, Alex Christian. 2008. Three-dimensional simulation of a dust lifting process with varying parameters. International Journal of Multiphase Flow. 869-878.
  • Ilea, Catalin Grigore; Kosinski, Pawel Jan; Hoffmann, Alex Christian. 2008. Simulation of a dust lifting process with rough walls. Chemical Engineering Science. 3864-3876.
  • Suciu, Crina S.; Hoffmann, Alex Christian; Kosinski, Pawel Jan. 2008. Obtaining YSZ nanoparticles by the sol-gel method with sucrose and pectin as organic precursors. Journal of Materials Processing Technology. 316-320.
  • Ho, Thinh Xuan; Kosinski, Pawel Jan; Hoffmann, Alex Christian; Vik, Arild. 2008. Numerical modelling of a solid oxide fuel cells: a charge diffusion-based model. Chemical Engineering Science. 5356-5365.
  • Ho, Thinh Xuan; Kosinski, Pawel Jan; Hoffmann, Alex Christian; Vik, Arild. 2008. Numerical modeling of solid oxide fuel cells. Chemical Engineering Science. 5356-5365.
  • Suciu, Crina S.; Hoffmann, Alex Christian; Dorolti, Eugen; Tetean, Romulus. 2008. NiO/YSZ nanoparticles obtained by new sol-gel route. Chemical Engineering Journal. 586-592.
  • Gottschalk, Timo; Dehling, Herold G.; Hoffmann, Alex Christian. 2008. Multiphase stochastic model for fluidized beds. Physical Review E. Statistical, Nonlinear, and Soft Matter Physics.
  • Ilea, Catalin Grigore; Kosinski, Pawel Jan; Hoffmann, Alex Christian. 2008. Influence of collision algorithm parameters on statistical results of dust lifting simulations. AIP Conference Proceedings. 815-818.
  • Austrheim, Trond; Gjertsen, Lars H.; Hoffmann, Alex Christian. 2008. Experimental investigation of the performance of a large-scale scrubber operating at elevated pressure on live natural gas. Fuel. 1281-1288.
  • Balakin, Boris V; Hoffmann, Alex Christian; Kosinski, Pawel Jan; Rhyne, Lee D. 2008. Eulerian-Eulerian simulation of sedimentation of uniformly-sized, non-Brownian spheres in viscous fluids. AIP Conference Proceedings. 723-726.
  • Suciu, Crina S.; Hoffmann, Alex Christian; Vik, Arild; Goga, Firuta. 2008. Effect of calcination conditions and precursor proportions on the properties of YSZ nanoparticles obtained by modified sol-gel route. Chemical Engineering Journal. 608-615.
  • Austrheim, Trond; Gjertsen, Lars H.; Hoffmann, Alex Christian. 2008. An experimental investigation of scrubber internals at conditions of low pressure. Chemical Engineering Journal. 95-102.
  • Peng, Weiming; Hoffmann, Alex Christian; Dries, Huub; Regelink, Michiel; Foo, Kee-Khoon. 2007. Reverse-flow centrifugal separators in parallel: Performance and flow pattern. AIChE Journal. 589-597.
  • Austrheim, Trond; Gjertsen, Lars H.; Hoffmann, Alex Christian. 2007. Re-entrainment correlations for demisting cyclones acting at elevated pressures on a range of fluids. Energy & Fuels. 2969-2976.
  • Ho, Thinh Xuan; Kosinski, Pawel Jan; Hoffmann, Alex Christian; Wærnhus, Ivar; Vik, Arild. 2007. Numerical Simulation of Electrochemical and Transport Processes in Solid Oxide Fuel Cells. ECS Transactions. 1901-1908.
  • Austrheim, Trond; Gjertsen, Lars H.; Hoffmann, Alex Christian. 2007. Is the Souders-Brown equation sufficient for scrubber design? An experimental investigation at elevated pressure with hydrocarbon fluids. Chemical Engineering Science. 5715-5727.
  • Suciu, Crina S.; Hoffmann, Alex Christian; Vik, Arild; Goga, Firuta. 2007. Fuel cells and nanoparticles. Studia Universitatis Babeş-Bolyai Chemia.. 3-12.
  • Ilea, Catalin Grigore; Kosinski, Pawel Jan; Hoffmann, Alex Christian. 2007. Dust Lifting Simulations with Particles of Distributed Sizes. AIP Conference Proceedings. 631-634.
  • Kosinski, Pawel Jan; Kosinska, Anna; Hoffmann, Alex Christian. 2007. Consequences of particle-particle interaction in a 2D square domain. AIP Conference Proceedings. 639-642.
  • Kosinski, Pawel Jan; Hoffmann, Alex Christian. 2007. An Eulerian-Lagrangian model for dense particle clouds. Computers & Fluids. 714-723.
  • Dehling, Herold G.; Dechsiri, Chutima; Gottschalk, Timo; Wright, Philip C.; Hoffmann, Alex Christian. 2007. A stochastic model for mixing and segregation in slugging fluidized beds. Powder Technology. 118-125.
  • Suciu, Crina S.; Gagea, L.ucia; Hoffmann, Alex Christian; Mocean, Marian. 2006. Sol-gel production of zirconia nanoparticles with a new organic precursor. Chemical Engineering Science. 7831-7835.
  • van der Spoel, D; Wensink, Erik Johannes; Hoffmann, Alex Christian. 2006. Lifting a wet glass from a table: A microscopic picture. Langmuir. 5666-5672.
  • Schaafsma, Stefan H.; Marx, Tom; Hoffmann, Alex Christian. 2006. Investigation of the particle flowpattern and segregation in tapered fluidized bed granulators. Chemical Engineering Science. 4467-4475.
  • Jacobsson, Siri; Austrheim, Trond; Hoffmann, Alex Christian. 2006. Experimental and computational fluid dynamics investigation of the flow in and around once-through swirl tubes. Industrial & Engineering Chemistry Research. 6525-6530.
  • Hoffmann, Alex Christian; Peng, Weiming; Dries, H; Regelink, M; Foo, KK. 2006. Effect of pressure recovery vanes on the performance of a swirl tube, with emphasis on the flow pattern and separation efficiency. Energy & Fuels. 1691-1697.
  • Gottschalk, T; Dehling, HG; Hoffmann, Alex Christian. 2006. Danckwerts' law for mean residence time revisited. Chemical Engineering Science. 6213-6217.
  • Kosinski, Pawel Jan; Hoffmann, Alex Christian. 2006. An investigation of the consequences of primary dust explosions in interconnected vessels. Journal of Hazardous Materials. 752-761.
  • Schaafsma, SH; Vonk, P; Kossen, NWF; Hoffmann, Alex Christian. 2006. A model for the spray zone in early-stage fluidized bed granulation. AIChE Journal. 2736-2741.
  • Dechsiri, Chutima; Ghione, A; van de Wiel, F; Dehling, Herold G.; Paans, AMJ; Hoffmann, Alex Christian. 2005. Positron emission tomography applied to fluidization engineering. Canadian Journal of Chemical Engineering.
  • Hoffmann, Alex Christian; Dechsiri, Chutima; van de Wiel, F; Dehling, Herold G. 2005. PET investigation of a fluidized particle: spatial and temporal resolution and short term motion. Measurement science and technology.
  • Ritherdon, J; Dechsiri, Chutima; Jones, AR; Hoffmann, Alex Christian; Wright, IG. 2005. On suitability of novel fluidised bed technique for separation of metallic powders during commercial powder metallurgical processing. Powder Metallurgy. 199-202.
  • Peng, Weiming; Hoffmann, Alex Christian; Dries, Huub W.A.; Regelink, Michiel A.; Foo, Kee-Khoon. 2005. Neutrally boyant tracer in gas cleaning equipment. A case study. Measurement science and technology. 2405-2414.
  • Kosinski, Pawel Jan; Hoffmann, Alex Christian. 2005. Modelling of dust lifting using the Lagrangian approach. International Journal of Multiphase Flow. 1097-1115.
  • Kosinski, Pawel Jan; Hoffmann, Alex Christian. 2005. Mathematical modelling of dust explosions in interconnected vessels. Nonlinear Analysis. 1087-1096.
  • Peng, Weiming; Hoffmann, Alex Christian; Dries, Huub; Regelink, Michiel A.; Stein, Louis E. 2005. Experimental study of the vortex end in centrifugal separators: The nature of the vortex end. Chemical Engineering Science. 6919-6928.
  • Kosinski, Pawel Jan; Hoffmann, Alex Christian; Klemens, R. 2005. Dust lifting behind shock waves: comparison of two modelling techniques. Chemical Engineering Science. 5219-5230.
  • Kosinski, Pawel Jan; Hoffmann, Alex Christian. 2005. Dust explosions in connected vessels: Mathematical modelling. Powder Technology. 108-116.
  • Dechsiri, Chutima; Van der Zwan, EA; Dehling, Herold G.; Hoffmann, Alex Christian. 2005. Dispersion of particle pulses in fluidized beds measured by positron emission tomography. AIChE Journal.
  • Peng, Weiming; Hoffmann, Alex Christian; Dries, Huub. 2004. Separation characteristics of swirl-tube dust separators. AIChE Journal. 87-96.
  • Cioffi, Mario; Ganzeveld, Klazien J.; Hoffmann, Alex Christian; Janssen, Leon P.B.M. 2004. A rheokinetic study of bulk free radical polymerization performed with a helical barrel rheometer. Polymer Engineering and Science. 179-185.
  • Bosma, J.C.; Hoffmann, Alex Christian. 2003. On the capacity of continuous powder classification in a gas fluidized bed with horizontal baffles. Powder Technology. 1-15.
  • Wensink, Erik Johannes; Hoffmann, Alex Christian; Maaren, P.J. van; Spoel, D. van der. 2003. Dynamic properties of water/alcohol mixtures studied by computer simulation. Journal of Chemical Physics. 7308-7317.
  • Biggs, C.A.; Sanders, C.; Scott, A.C.; Willemse, A.W.; Hoffmann, Alex Christian; Instone, T.; Salman, A.D.; Hounslow, M.J. 2003. Coupling granule properties and granulation rates in high-shear granulation. Powder Technology. 162-168.
  • Cioffi, M.; Ganzeveld, K.J.; Hoffmann, Alex Christian; Janssen, L.P.B.M. 2002. Rheokinetics of linear polymerization. A literature review. Polymer Engineering and Science. 2383-2392.
  • Peng, W.; Hoffmann, Alex Christian; Boot, P.J.A.J.; Udding, A.; Dries, H.W.A.; Ekker, A.; Kater, J. 2002. Flowpattern in Reverse Flow Centrifugal Separators. Powder Technology. 212-222.
  • Reuvekamp, R.J.; Ray, M.B.; Hoffmann, Alex Christian. 2002. Deposition of Fine Powder in Horizontal Pipelines and Bends. Chemical Engineering Communications. 849-864.
  • Cioffi, M.; Hoffmann, Alex Christian; Janssen, L.P.B.M. 2001. Rheokinetics and the influence of shear rate on the Trommsdorff (gel) effect during free radical polymerization. Polymer Engineering and Science. 595-602.
  • Cioffi, M.; Janssen, L.P.B.M.; Hoffmann, Alex Christian. 2001. Reducing the gel effect in free radical polymerization. Chemical Engineering Journal. 911-915.
  • Cioffi, M.; Janssen, L.P.B.M.; Hoffmann, Alex Christian. 2001. Instabilities in free radical polymerization. Nonlinear Analysis: Real world applications. 897-906.
  • Peng, W.; Boot, P.J.A.J.; Hoffmann, Alex Christian; Dries, H.W.A.; Kater, J.; Ekker, A. 2001. Flow in the inlet region in tangential inlet cyclones. Industrial & Engineering Chemistry Research. 5649-5655.
  • Hoffmann, Alex Christian; Groot, M. de; Peng, W.; Dries, H.W.A.; Kater, J. 2001. Advantages and risks in increasing cyclone separator length. AIChE Journal. 2452-2460.
Lecture
  • Ghaffari, Maryam; Skjold, Trygve; Wingerden, Kees van; Hisken, Helene; Eckhoff, Rolf Kristian; Hoffmann, Alex Christian. 2016. A model validation framework for the dust explosion simulator FLACS-DustEx: Challenges, limitations and possibilities.
Popular scientific lecture
  • Suciu, C. S.; Tikkanen, Hanna-Mari Viktoria; Ho, Thinh Xuan; Hoffmann, Alex Christian; Vik, A.; Wærnhus, I. 2010. Hydrogenaktiviteter på Universitetet i Bergen.
  • Hoffmann, Alex Christian. 2009. Fysikkens rolle for energispørgsmål.
  • Suciu, C. S.; Mæland, Dagfinn; Hoffmann, Alex Christian; Vik, A.; Wærnhus, I. 2008. Research in materials for solid oxide fuel cells.
  • Hoffmann, Alex Christian. 2005. Innen den overskuelige framtid vil verdens energiforbuk mangedoplet, hvilke utfordringer byr det på? Finnes det plausible løsninger?
  • Hoffmann, Alex Christian. 2005. Energy for the future, wherefrom?
  • Hoffmann, Alex Christian. 2005. Energikilder for det næste århundrede.
  • Hoffmann, Alex Christian. 2001. Brændselsceller, en anden slags elektrokemi.
Academic lecture
  • Ghaffari, Maryam; Skjold, Trygve; Mauri, Lorenzo; Hoffmann, Alex Christian; Eckhoff, Rolf Kristian; Wingerden, Kees van. 2018. Turbulence modulation modelling in the CFD simulator FLACS-DustEx.
  • Ghaffari, Maryam; Skjold, Trygve; Eckhoff, Rolf Kristian; Wingerden, Kees van; Hoffmann, Alex Christian. 2018. Effect of particle size on burning velocity calculation in FLACS-DustEx.
  • Ghaffari, Maryam; Mauri, Lorenzo; Skjold, Trygve; Hoffmann, Alex Christian; Wingerden, Kees van; Eckhoff, Rolf Kristian. 2017. Improved modelling of particle-laden flow in the CFD simulator FLACS-DustEx.
  • Balakin, Boris; Adamsen, Tom Christian Holm; Chang, Yu-Fen; Kosinski, Pawel Jan; Hoffmann, Alex Christian. 2016. Non-invasive studies of multiphase flow in process equipment. Positron emission particle tracking technique.
  • Balakin, Boris V; Kosinski, Pawel Jan; Kartushinsky, Alexander; Hoffmann, Alex Christian. 2016. CFD-PBM modelling of agglomeration and deposition in petroleum industry.
  • Balakin, Boris V; Hoffmann, Alex Christian; Kosinski, Pawel Jan. 2013. Restitution of momentum during interparticle collision affected by liquid bridge.
  • Middha, Prachi; Balakin, Boris V; Hoffmann, Alex Christian; Kosinski, Pawel Jan. 2013. PEPT and CFD investigation of lean-phase pneumatic conveying through a bend.
  • Chang, Yu-Fen; Adamsen, Tom Christian; Hoffmann, Alex Christian. 2012. Using a PET camera to track individual phases in process equipment with high temporal and spatial resolutions: Algorithm development.
  • Chang, Yu-Fen; Skorpen, Åshild; Hoffmann, Alex Christian. 2012. Detecting anomalies in the separation process in a hydrocyclone using a medical PET scanner.
  • Kosinski, Pawel Jan; Hoffmann, Alex Christian. 2011. Particle-particle agglomeration and use of the hard-sphere model.
  • Chang, Yu-Fen; Ilea, Catalin Grigore; Aasen, Øystein Lee; Hoffmann, Alex Christian. 2011. Particle trajectories in a hydrocyclone measured by PEPT.
  • Chang, Yu-Fen; Pisarev, Gleb; Hoffmann, Alex Christian. 2011. PEPT: an invaluable tool for 3-D particle tracking and CFD simulation verification in hydrocyclone studies.
  • Sæthre, Bjørn Steen; Hoffmann, Alex Christian; Spoel, David van der. 2011. Order parameters for detection and demarkation of interfaces in hydrate-fluid and ice-fluid systems.
  • Tikkanen, Hanna-Mari Viktoria; Suciu, C.; Wærnhus, I; Hoffmann, Alex Christian. 2011. Fabrication and cell performance of anode-supported SOFC made of in-house produced NiO-YSZ nano-composite powder.
  • Suciu, C.; Hoffmann, Alex Christian; Dorolti, E.; Tetean, R.; Vik, A. 2010. Properties of 3-15 mol% YSZ materials.
  • Chang, Yu-Fen; Hoffmann, Alex Christian; Ilea, Catalin Grigore; Aasen, Øystein L. 2010. Particle flow in a hydrocyclone investigated by radioactive particle tracking.
  • Ilea, Catalin Grigore; Kosinski, Pawel Jan; Hoffmann, Alex Christian. 2010. Ordering of monosized particles during simulations of a fluid-solid flow under shear.
  • Suciu, C. S.; Hoffmann, Alex Christian; Wærnhus, I. 2010. A flexible, cost-effective production method for high-quality nanoparticles.
  • Ho, Thinh Xuan; Kosinski, Pawel Jan; Hoffmann, Alex Christian; Vik, Arild. 2009. Fully three-dimensional modeling of Solid Oxide Fuel Cells.
  • Balakin, Boris V; Hoffmann, Alex Christian; Kosinski, Pawel Jan. 2009. Computational fluid dynamic model of gas hydrate deposition in a turbulent flow.
  • Suciu, Crina S.; Mæland, Dagfinn; Hoffmann, Alex Christian; Vik, Arild; Wærnhus, Ivar. 2008. The Use of Nanoparticles for Solid Oxide Fuel Cell Components.
  • Sæthre, Bjørn Steen; Hoffmann, Alex Christian. 2008. Surface-fluctuations on clathrate hydrate structure I and II slabs in selected environments.
  • Suciu, Crina S.; Mæland, Dagfinn; Hoffmann, Alex Christian; Vik, Arild; Wærnhus, Ivar. 2008. Priorities in Material Design for Solid Oxide Fuel Cells -With Emphasis on the Anode and the Electrolyte.
  • Ho, Thinh Xuan; Kosinski, Pawel Jan; Hoffmann, Alex Christian; Vik, A. 2008. Numerical study of an SOFC with direct internal reforming using charge diffusion-based model.
  • Suciu, Crina S.; Hoffmann, Alex Christian; Goga, A.; Tetean, R.; Dorolti, E. 2008. NiO nanoparticles for SOFC anodes. Comparison of two synthesis methods.
  • Barth, Tanja; Talatori, Shiva; Erstad, Kristin; Borgund, Anna Elisabet; Genov, Georgi Yordanov; Sæthre, Bjørn Steen; Kosinski, Pawel Jan; Hoffmann, Alex Christian. 2008. Hydrates in petroleum production-assessment of plug risk. Project HYPERION enters it s third and final year.
  • Ilea, Catalin Grigore; Kosinski, Pawel Jan; Hoffmann, Alex Christian. 2007. Simulation of a dust lifting process in a two-dimensional domain with rough walls.
  • Kosinski, Pawel Jan; Kosinska, Anna; Hoffmann, Alex Christian. 2007. Numerical simulation of particle-flow interactions: formation of agglomerates.
  • Peng, Weiming; Jacobsson, Siri; Hoffmann, Alex Christian. 2007. Neutrally buoyant tracer in gas cleaning equipment. A case study.
  • Suciu, Crina Silvia; Hoffmann, Alex Christian. 2006. Sol-Gel Production of ZrO2 and YSZ with a New Organic Precursor.
  • Kosinski, Pawel Jan; Kosinska, Anna; Hoffmann, Alex Christian. 2006. Fluid-particle flows in a driven cavity.
  • Ho, Thinh Xuan; Kosinski, Pawel Jan; Hoffmann, Alex Christian. 2006. Direct numerical simulation of particle-fluid flow: The state-of-the-art.
  • Ilea, Catalin Grigore; Kosinski, Pawel Jan; Hoffmann, Alex Christian. 2006. 3-D Eulerian-Lagrangian Simulation of Dust Lifting.
  • Hoffmann, Alex Christian. 2005. The physics of cyclones.
  • Kosinski, Pawel Jan; Hoffmann, Alex Christian. 2004. Mathematical modelling of dust explosions in interconnected vessels.
  • Hoffmann, Alex Christian; Dechsiri, C.; Wiel, F. van de; Ghione, A.; Dehling, H.G.; Paans, A.M.J. 2003. Tracking individual particles in a fluidized bed using a medical PET-Camera.
  • Dechsiri, C.; Wiel, F. van de; Dehling, H.G.; Paans, A.M.J.; Hoffmann, Alex Christian. 2003. Positron emission tomography applied to fluidization engineering.
  • Hoffmann, Alex Christian. 2003. Brændselcellekursus.
  • Dechsiri, C.; Dehling, H.G.; Hoffmann, Alex Christian. 2002. Stochastic Model for Fluidization.
  • Dechsiri, C.; Zwan, E. van der; Bosma, J.C.; Paans, A.M.J.; Hoffmann, Alex Christian. 2002. Positron Emission Tomography (PET) for Fluidization.
  • Wright, P.C.; Makkawi, Y.T.; Meeyoo, V.; Dechsiri, C.; Zwan, E. van der; Paans, A.M.J.; Hoffmann, Alex Christian. 2002. Observation of Cross-Sectional Non-Uniformity in Fluidized Beds Using Two Different Imaging Techniques.
  • Apol, M.E.F.; Berendsen, H.J.C.; Mark, A.E.; Hoffmann, Alex Christian. 2002. Interparticle Forces for DEM by MD Simulations.
  • Hoffmann, Alex Christian. 2002. Gas Cyclone Separators -- Potential and Limitations.
  • Hoffmann, Alex Christian. 2002. Gas Cyclone Separators -- Potential and Limitations.
  • Bosma, J.C.; Hoffmann, Alex Christian. 2002. Feasibility Study of Particle Classification in Fluidized Beds with Internal Baffles.
  • Hoffmann, Alex Christian. 2002. Brenselscelleteknologi.
  • Hoffmann, Alex Christian. 2001. Hvordan levere kompetence til gasindustrien?
  • Peng, W.; Hoffmann, Alex Christian; Boot, P.J.A.J.; Udding, A.; Dries, H.W.A. 2001. Determining the best modelling assumptions for cyclones and swirl tubes by CFD and LDA.
  • Biggs, C.A.; Sanders, C.F.W.; Scott, A.C.; Willemse, A.W.; Hoffmann, Alex Christian; Instone, T.; Salman, A.D.; Hounslow, M.J. 2001. Coupling granule properties and granulation rates in high-shear granulation.
  • Dechsiri, C.; Bosma, J.C.; Hoffmann, Alex Christian; Hui, G.; Dehling, H.G. 2001. A Stochastic Model for Particle Mixing and Segregation in Fluidized Beds with Baffles.
  • Torres, CA; Hoffmann, Alex Christian; Kloss-Quiroga, B; Lindtjørn, Bernt. 1999. Towards an European Masters in International: the experience of TropEdEurope since 1996.
Book review
  • Hoffmann, Alex Christian. 2001. Book review, Transport Phenomena by W.J. Beek et al. Chemical Engineering Journal. 337.
Academic monograph
  • Dehling, Herold G.; Gottschalk, Timo; Hoffmann, Alex Christian. 2007. Stochastic modelling in process technology.
  • Hoffmann, Alex Christian; Stein, Louis E. 2007. Gas cyclones and swirl tubes: principles, design and operation.
  • Hoffmann, Alex Christian; Stein, Louis E. 2002. Cyclones and Swirl Tubes, Principles, Design and Operation.
Feature article
  • Hoffmann, Alex Christian. 2005. Fremtidens energi. Bergens Tidende. 1 pages.
Doctoral dissertation
  • Karakitsiou, Stamatina. 2018. Experimental and theoretical study of pressure-driven transport of gases in micro and nanopores .
  • Chang, Yu-Fen. 2016. Study of the flow in a hydrocyclone using positron emission particle tracking and computational fluid dynamics simulation.
  • Tveit, Jesper. 2016. A Nonlinear Differential Equation Solver With Potential Application to Pelton Turbines.
  • Sæthre, Bjørn Steen. 2015. Interfacial free energies in gas-hydrate/fluid interfaces.
  • Pisarev, Gleb. 2011. Experimental and numerical study of the End of the Vortex phenomenon.
  • Balakin, Boris V. 2010. Experimental and theoretical study of the flow, aggregation and.
  • Ho, Thinh Xuan. 2009. Modeling of Transport, Chemical and Electrochemical Processes in Solid Oxide Fuel Cells.
  • Ilea, Catalin Grigore. 2008. Numerical Simulations of Dust Lifting.
  • Ilea, Crina Silvia. 2007. New Materials for Solid Oxide Fuel Cells Based on Nanoparticles.
  • Austrheim, Trond. 2006. Experimental Characterization of High-Pressure Natural Gas Scrubbers.
  • Wensink, Erik Johannes. 2005. Molecular Simulations of Complex Liquids and Confined Systems.
  • Dechsiri, Chutima. 2004. Particle Transport in Fluidized Beds; Experiments and Stochastic Models.
Documentary
  • Eckhoff, Rolf Kristian; Hoffmann, Alex Christian; Csernai, László Pál; Vaagen, Jan S. 2017. Overdrevet "klimagevinst".
  • Eckhoff, Rolf Kristian; Hoffmann, Alex Christian; Csernai, László Pál; Vaagen, Jan S. 2017. Full elektrifisering er et blindspor.
  • Eckhoff, Rolf Kristian; Hoffmann, Alex Christian; Csernai, László Pál; Vaagen, Jan S. 2017. Full electrification is dead-end, Article in Bergens Tidende, 3. oktober (2017).
  • Eckhoff, Rolf Kristian; Hoffmann, Alex Christian; Csernai, László Pál; Vaagen, Jan S. 2017. Exaggerated "climate gains" article in Bergens Tidende.
Academic chapter/article/Conference paper
  • Suciu, Crina S.; Dorolti, E.; Hoffmann, Alex Christian. 2015. Properties of xYSZ nanoparticles and pellets with x varying from 1 to 15%. 4 pages.
  • Karakitsiou, Stamatina; Eder, Sabrina Daniela; Holst, Bodil; Hoffmann, Alex Christian. 2015. Design, development and testing of apparatus to study gas diffusion in nanochannels. 4 pages.
  • Hoffmann, Alex Christian. 2011. Stochastic Modeling Techniques in Powder Technology. 46 pages.
Errata
  • Kosinski, Pawel Jan; Hoffmann, Alex Christian. 2014. Extended hard-sphere model and collisions of cohesive particles (vol 84, 031303, 2011). Physical Review E. Statistical, Nonlinear, and Soft Matter Physics.

More information in national current research information system (CRIStin)