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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
Books
  • Dehling, Herold G.; Gottschalk, Timo; Hoffmann, Alex Christian. 2007. Stochastic modelling in process technology. Elsevier. 279 pages. ISBN: 978--0444-52026-5.
  • Hoffmann, Alex Christian; Stein, Louis E. 2007. Gas cyclones and swirl tubes: principles, design and operation. Springer. 426 pages. ISBN: 978-3-540-74694-2.
  • Hoffmann, Alex Christian; Stein, Louis E. 2002. Cyclones and Swirl Tubes, Principles, Design and Operation. 347 pages. ISBN: 3-540-43326-0.
Journal articles
  • Dries, Huub; Hoffmann, Alex Christian. 2019. A correlation giving improved description of the capacity and efficiency of vane-type gas-liquid separators. AIChE Journal. doi: 10.1002/aic.16566
  • Ghaffari, Maryam; Hoffmann, Alex Christian; Skjold, Trygve; Eckhoff, Rolf Kristian; Wingerden, Kees van. 2019. A brief review on the effect of particle size on the laminar burning velocity of flammable dust: Application in a large-scale CFD tool. Journal of Loss Prevention in the Process Industries. 62.
  • Hoffmann, Alex Christian; Pletten, Sandra; Mania, Mirko. 2019. A study of transfer rates of phenols from caustic to crude oil. Separation and Purification Technology. 212: 515-519. doi: 10.1016/j.seppur.2018.11.058
  • Hoffmann, Alex Christian; Skorpen, Åshild; Chang, Yu-Fen. 2019. Positron emission particle tracking and CFD investigation of hydrocyclones acting on liquids of varying viscosity. Chemical Engineering Science. 200: 310-319. doi: 10.1016/j.ces.2019.01.061
  • 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. 1: 136-145.
  • 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. 781: 1-7. doi: 10.1088/1742-6596/781/1/012039
  • Karakitsiou, Stamatina; Holst, Bodil; Hoffmann, Alex Christian. 2017. Pressure-Driven Gas Flow through Nano-Channels at High Knudsen Number. Journal of Nano Research. 50: 116-127. doi: 10.4028/www.scientific.net/JNanoR.50.116
  • 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. 250: 270-279. doi: 10.1016/j.jmatprotec.2017.07.007
  • 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. 78: 875-887. doi: 10.1149/07801.0875ecst
  • Thambiraj, Nelson; Suciu, C.; Warnhus, I.; Vik, A.; Hoffmann, Alex Christian. 2017. SOFC Cathode Degradation due to Salt Contamination. ECS Transactions. 78: 915-925. doi: 10.1149/07801.0915ecst
  • 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. 153: 45-57. doi: 10.1016/j.ces.2016.07.010
  • 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. 38: 611-620. doi: 10.1080/01932691.2016.1185015
  • Karakitsiou, Stamatina; Holst, Bodil; Hoffmann, Alex Christian. 2016. Apparatus for measuring pressure-driven transport through channels at high Knudsen numbers. Review of Scientific Instruments. 87:125104. doi: 10.1063/1.4963695
  • 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. 56:4. Published 2015-01-10. doi: 10.1007/s00348-014-1875-5
  • 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. 257: 47-54. doi: 10.1016/j.powtec.2014.02.041
  • 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. 70: 674-687. doi: 10.1016/j.ijheatmasstransfer.2013.11.052
  • 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. 89. doi: 10.1103/PhysRevE.89.049901
  • 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. 108: 169-175. doi: 10.1016/j.ces.2014.01.008
  • 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. 10: 5606-5615. doi: 10.1021/ct500459x
  • 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. 59: 4045-4057. doi: 10.1002/aic.14162
  • 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. 50. 8 pages. doi: 10.1051/epjconf/20135005001
  • 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. 58: 107-116. doi: 10.1016/j.ijheatmasstransfer.2012.11.011
  • 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. 237: 87-96. doi: 10.1016/j.powtec.2013.01.024
  • Balakin, Boris V; Hoffmann, Alex Christian; Kosinski, Pawel Jan. 2012. The collision efficiency in a shear flow. Chemical Engineering Science. 68: 305-312. doi: 10.1016/j.ces.2011.09.042
  • 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. 228: 108-114.
  • 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. doi: 10.1109/I2MTC.2012.6229306
  • 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. 1479: 193-196. doi: 10.1063/1.4756095
  • 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. 1479: 217-219. doi: 10.1063/1.4756101
  • 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. 58: 1371-1380. doi: 10.1002/aic.12695
  • 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. 222: 101-107. doi: 10.1016/j.powtec.2012.02.006
  • 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. 116: 5933-5940. doi: 10.1021/jp300230p
  • 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. 66: 755-765. doi: 10.1016/j.ces.2010.11.034
  • Balakin, Boris V; Kosinski, Pawel Jan; Hoffmann, Alex Christian. 2011. Untitled Reply. AIChE Journal. 57: 2288-2288. doi: 10.1002/aic.12674
  • 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. 1389: 110-113. doi: 10.1063/1.3636682
  • 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. 66: 4203-4211. doi: 10.1016/j.ces.2011.06.001
  • 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. 1389: 183-186. doi: 10.1063/1.3636698
  • Ilea, Catalin Grigore; Kosinski, Pawel Jan; Hoffmann, Alex Christian. 2011. Numerical study on the dynamics of a jet-vortex interaction. Applied Mathematics and Computation. 217: 5103-5112. doi: 10.1016/j.amc.2010.07.081
  • 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. 84. doi: 10.1103/PhysRevE.84.031303
  • 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. 1389: 135-138. doi: 10.1063/1.3636688
  • 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. 217: 5016-5022. doi: 10.1016/j.amc.2010.07.050
  • 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. 31: 1733-1739. doi: 10.1016/j.jeurceramsoc.2011.03.015
  • Tikkanen, Hanna-Mari Viktoria; Suciu, Crina S.; Wærnhus, Ivar; Hoffmann, Alex Christian. 2011. Dip-coating of 8YSZ nanopowder for SOFC applications. Ceramics International. 37: 2869-2877. doi: 10.1016/j.ceramint.2011.05.006
  • 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. 56: 2052-2062. doi: 10.1002/aic.12122
  • 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. 65: 5007-5017. doi: 10.1016/j.ces.2010.06.005
  • 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. 1281: 151-154. doi: 10.1063/1.3498074
  • 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. 4: 116-126.
  • 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. 70: 177-182. doi: 10.1016/j.petrol.2009.11.007
  • 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. 195: 6764-6773. doi: 10.1016/j.jpowsour.2010.03.090
  • 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. 35: 4276-4285. doi: 10.1016/j.ijhydene.2010.02.016
  • Kosinski, Pawel Jan; Hoffmann, Alex Christian. 2010. An extension of the hard-sphere particle-particle collision model to study agglomeration. Chemical Engineering Science. 65: 3231-3239. doi: 10.1016/j.ces.2010.02.012
  • Kosinski, Pawel Jan; Hoffmann, Alex Christian. 2010. Quantification of the adhesive impulse for the extended hard-sphere model. AIP Conference Proceedings. 1281: 163-166. doi: 10.1063/1.3498144
  • 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. 158: 11-18. doi: 10.1016/j.cej.2008.07.014
  • 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. 68: 209-217. doi: 10.1016/j.petrol.2009.06.012
  • 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. 34: 3488-3499. doi: 10.1016/j.ijhydene.2009.02.016
  • 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. 64: 3000-3009. doi: 10.1016/j.ces.2009.03.043
  • 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. 25: 1231-1240. doi: 10.1149/1.3205652
  • Ilea, Catalin Grigore; Kosinski, Pawel Jan; Hoffmann, Alex Christian. 2009. Jet-vortex interaction: a numerical study. AIP Conference Proceedings. 1168: 617-620. doi: 10.1063/1.3241538
  • Ilea, Catalin Grigore; Kosinski, Pawel Jan; Hoffmann, Alex Christian. 2009. The effect of polydispersity on dust lifting behind shock waves. Powder Technology. 196: 194-201. doi: 10.1016/j.powtec.2009.07.023
  • 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. 79: 061302. doi: 10.1103/PhysRevE.79.061302
  • Kosinski, Pawel Jan; Kosinska, Anna; Hoffmann, Alex Christian. 2009. Simulation of solid particles behaviour in a driven cavity flow. Powder Technology. 191: 327-339. doi: 10.1016/j.powtec.2008.10.025
  • Kosinski, Pawel; Kosinska, Anna Dorota; Hoffmann, Alex Christian. 2009. Simulation of solid particles behaviour in a driven cavity flow. Powder Technology. 191: 327-339.
  • 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. 29: 2537-2547. doi: 10.1016/j.jeurceramsoc.2009.03.013
  • 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. 1168: 641-644.
  • 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. 25: 1679-1686. doi: 10.1149/1.3205706
  • 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.. 54: 261-272.
  • 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. 87: 1281-1288. doi: 10.1016/j.fuel.2007.07.022
  • Austrheim, Trond; Gjertsen, Lars H.; Hoffmann, Alex Christian. 2008. An experimental investigation of scrubber internals at conditions of low pressure. Chemical Engineering Journal. 138: 95-102. doi: 10.1016/j.cej.2007.05.048
  • 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. 1048: 723-726.
  • Gottschalk, Timo; Dehling, Herold G.; Hoffmann, Alex Christian. 2008. Multiphase stochastic model for fluidized beds. Physical Review E. Statistical, Nonlinear, and Soft Matter Physics. 77. doi: 10.1103/PhysRevE.77.031306
  • 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. 63: 5356-5365. doi: 10.1016/j.ces.2008.07.021
  • Ho, Thinh Xuan; Kosinski, Pawel Jan; Hoffmann, Alex Christian; Vik, Arild. 2008. Numerical modeling of solid oxide fuel cells. Chemical Engineering Science. 63: 5356-5365. doi: 10.1016/j.ces.2008.07.021
  • Ilea, Catalin Grigore; Kosinski, Pawel Jan; Hoffmann, Alex Christian. 2008. Simulation of a dust lifting process with rough walls. Chemical Engineering Science. 63: 3864-3876. doi: 10.1016/j.ces.2008.04.056
  • 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. 1048: 815-818.
  • 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. 34: 869-878. doi: 10.1016/j.ijmultiphaseflow.2008.02.007
  • Suciu, Crina S.; Hoffmann, Alex Christian; Dorolti, Eugen; Tetean, Romulus. 2008. NiO/YSZ nanoparticles obtained by new sol-gel route. Chemical Engineering Journal. 140: 586-592. doi: 10.1016/j.cej.2008.02.006
  • 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. 202: 316-320. doi: 10.1016/j.jmatprotec.2007.09.009
  • 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. 138: 608-615. doi: 10.1016/j.cej.2007.09.020
  • 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. 21: 2969-2976. doi: 10.1021/ef070109t
  • 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. 62: 5715-5727. doi: 10.1016/j.ces.2007.06.014
  • 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. 171: 118-125. doi: 10.1016/j.powtec.2006.10.008
  • 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. 7: 1901-1908. doi: 10.1149/1.2729302
  • Ilea, Catalin Grigore; Kosinski, Pawel Jan; Hoffmann, Alex Christian. 2007. Dust Lifting Simulations with Particles of Distributed Sizes. AIP Conference Proceedings. 936: 631-634. doi: 10.1063/1.2790227
  • Kosinski, Pawel Jan; Hoffmann, Alex Christian. 2007. An Eulerian-Lagrangian model for dense particle clouds. Computers & Fluids. 36: 714-723. doi: 10.1016/j.compfluid.2006.06.003
  • Kosinski, Pawel Jan; Kosinska, Anna; Hoffmann, Alex Christian. 2007. Consequences of particle-particle interaction in a 2D square domain. AIP Conference Proceedings. 936: 639-642. doi: 10.1063/1.2790229
  • Kosinski, Pawel; Kosinska, Anna Dorota; Hoffmann, Alex Christian. 2007. Consequences of particle-particle interaction in a 2-D square domain. AIP Conference Proceedings. 936: 639-642.
  • 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. 53: 589-597. doi: 10.1002/aic.11121
  • Suciu, Crina S.; Hoffmann, Alex Christian; Vik, Arild; Goga, Firuta. 2007. Fuel cells and nanoparticles. Studia Universitatis Babeş-Bolyai Chemia.. 52: 3-12.
  • Gottschalk, T; Dehling, HG; Hoffmann, Alex Christian. 2006. Danckwerts' law for mean residence time revisited. Chemical Engineering Science. 61: 6213-6217.
  • 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. 20: 1691-1697.
  • 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. 45: 6525-6530.
  • Kosinski, Pawel Jan; Hoffmann, Alex Christian. 2006. An investigation of the consequences of primary dust explosions in interconnected vessels. Journal of Hazardous Materials. 137: 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. 52: 2736-2741.
  • Schaafsma, Stefan H.; Marx, Tom; Hoffmann, Alex Christian. 2006. Investigation of the particle flowpattern and segregation in tapered fluidized bed granulators. Chemical Engineering Science. 61: 4467-4475. doi: 10.1016/j.ces.2006.01.040
  • 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. 61: 7831-7835. doi: 10.1016/j.ces.2006.09.006
  • van der Spoel, D; Wensink, Erik Johannes; Hoffmann, Alex Christian. 2006. Lifting a wet glass from a table: A microscopic picture. Langmuir. 22: 5666-5672.
  • 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. 83.
  • 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. 51.
  • Hoffmann, Alex Christian. 2005. Fremtidens energi. Bergens Tidende. 1 pages.
  • 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. 16.
  • Kosinski, Pawel Jan; Hoffmann, Alex Christian. 2005. Mathematical modelling of dust explosions in interconnected vessels. Nonlinear Analysis. 63: 1087-1096.
  • Kosinski, Pawel Jan; Hoffmann, Alex Christian. 2005. Dust explosions in connected vessels: Mathematical modelling. Powder Technology. 155: 108-116.
  • Kosinski, Pawel Jan; Hoffmann, Alex Christian. 2005. Modelling of dust lifting using the Lagrangian approach. International Journal of Multiphase Flow. 31: 1097-1115.
  • Kosinski, Pawel Jan; Hoffmann, Alex Christian; Klemens, R. 2005. Dust lifting behind shock waves: comparison of two modelling techniques. Chemical Engineering Science. 60: 5219-5230.
  • 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. 16: 2405-2414.
  • 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. 60: 6919-6928.
  • 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. 48: 199-202.
  • 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. 44: 179-185.
  • Peng, Weiming; Hoffmann, Alex Christian; Dries, Huub. 2004. Separation characteristics of swirl-tube dust separators. AIChE Journal. 50: 87-96. doi: 10.1002/aic.10008
  • 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. 130: 162-168.
  • Bosma, J.C.; Hoffmann, Alex Christian. 2003. On the capacity of continuous powder classification in a gas fluidized bed with horizontal baffles. Powder Technology. 134: 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. 119: 7308-7317.
  • 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. 42: 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. 127: 212-222.
  • Reuvekamp, R.J.; Ray, M.B.; Hoffmann, Alex Christian. 2002. Deposition of Fine Powder in Horizontal Pipelines and Bends. Chemical Engineering Communications. 189: 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. 41: 595-602.
  • Cioffi, M.; Janssen, L.P.B.M.; Hoffmann, Alex Christian. 2001. Instabilities in free radical polymerization. Nonlinear Analysis: Real world applications. 47: 897-906.
  • Cioffi, M.; Janssen, L.P.B.M.; Hoffmann, Alex Christian. 2001. Reducing the gel effect in free radical polymerization. Chemical Engineering Journal. 56: 911-915.
  • Hoffmann, Alex Christian. 2001. Book review, Transport Phenomena by W.J. Beek et al. Chemical Engineering Journal. 81: 337.
  • 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. 47: 2452-2460.
  • 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. 40: 5649-5655.
Reports and theses
  • Amundsen, P. A.; Hoffmann, Alex Christian; Olsson, G. 2009. Søknad om akkreditering av Doktorgrad i prosess,-energi- og automatiseringsteknikk ved Høgskolen i Telemark: Rapport fra sakkyndig komie. Norgesnettrådets rapporter. NA. NOKUT. 26 pages.
  • Peng, Weiming; Hoffmann, Alex Christian; Foo, Kee-Khoon. 2004. Visualization of the vortex end in the Shell swirl tube Controlling the vortex end in the Shell swirl tube Controlling the vortex end and crosstalk, and finding the optimal geometry for the Shell TSS swirl-deck. UiB, Bergen. 54 pages.
Book sections
  • Karakitsiou, Stamatina; Eder, Sabrina Daniela; Holst, Bodil; Hoffmann, Alex Christian. 2015. Design, development and testing of apparatus to study gas diffusion in nanochannels. artikkel, pages 214-217. In:
    • NSTI, Nanotechnology. 2015. Biotech, Biomaterials and Biomedical. TechConnect Briefs 2015. CRC Press. 342 pages. ISBN: 978-1-4987-4729-5.
  • Suciu, Crina S.; Dorolti, E.; Hoffmann, Alex Christian. 2015. Properties of xYSZ nanoparticles and pellets with x varying from 1 to 15%. artikkel, pages 235-238. In:
    • NSTI, Nanotechnology. 2015. Advanced Materials: TechConnect Briefs 2015. CRC Press. 632 pages. ISBN: 9781498747271.
  • Hoffmann, Alex Christian. 2011. Stochastic Modeling Techniques in Powder Technology. Kapitel 9, pages . In:
    • Barker, Jason M. 2011. Powder Engineering, Technology and Applications. Nova Science Publishers, Inc.. 400 pages. ISBN: 9781617612169.

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