Publications

Peer reviewed journal papers

Rohlfs, W., Thiel, G. P., Lienhard V, J.H.: Modeling reverse osmosis element design using superposition and an analogy to convective heat transfer, J. of Membrane Science, forthcoming, 2016.

Scheid, B., Kofman, N., Rohlfs, W.: Critical inclination for Absolute/Convective instability transition in inverted falling films, Physics of Fluids, forthcoming, 2016.

Rohlfs, W., Lienhard V, J.H.: Entrance length effects on Graetz number scaling in laminar duct flows with periodic obstructions: Transport number correlations for spacer-filled membrane channel flows, Int. J. of Heat and Mass Transfer, 97, 842-852, 2016.

Sabelberg, E., Cardenas, M., Kneer, R., Rohlfs, W.: Design, development, and validation of concepts for generating passive pulsation in cooling nozzles. Case Studies in Thermal Engineering, forthcoming, 2016.

Gronarz, T., Frekers, Y., Kneer, R., Rohlfs, W.: The influence of subsurface temperature measure-ments on the determination of transient wall-side boundary conditions: An analytical tool, Heat Transfer Engineering, forthcoming, 2016.

Seel, K., Reddemann, M., Verbaere, V. Mathieu. F., Cárdenas, M., Rohlfs, W., Haustein, H. D., Kneer, R.: A spin coating device for the investigation of spray-film interactions under engine relevant conditions. Atomization and Sprays, forthcoming, 2016.

Rohlfs, W., Scheid, B.: Phase diagram for the onset of circulating waves and flow reversal in inclined falling films, J. of Fluid Mechanics, 763, 322-351, 2015.

Rietz, M., Rohlfs, W., Kneer, R., Scheid, B.: Experimental investigation of thermal structures in regular three-dimensional falling films, European Physics J. Special Topic, 224, 355-368, 2015.

Gronarz, T., Frekers, Y., Kneer, R., Rohlfs, W.; The influence of subsurface temperature measure-ments on the determination of transient wall-side boundary conditions: An analytical tool, Heat Transfer Engineering, forthcoming, 2015.

Rohlfs, W., Ehrenpreis, C., Haustein, H., Kneer, R.: Influence of viscous flow relaxation time on self-similarity in free-surface jet impingement, Int. J. of Heat and Mass Transfer, 78, 435-446, 2014.

Rohlfs W., Madlener R.: Optimal Investment Strategies in Power Generation Assets: The Role of Technological Choice and Existing Portfolios in the Deployment of Low-Carbon Technologies. Int. J. Greenhouse Gas Control, 28, 114-125, 2014.

Rohlfs, W., Binz, M., Kneer, R.: On the stabilizing effect of a liquid film on a cylindrical core by oscillatory motions. Physics of Fluids, 26, 022101, 2014.

Binz, M., Rohlfs, W., Kneer, R.: Direct numerical simulations of a thin liquid film coating an axially oscillating cylindrical surface. Fluid Dynamics Research, 46, 041402, 2014.

Dietze, G. F., Rohlfs, W., Nährich, K., Kneer, R., Scheid, B.: Three-dimensional flow structures in laminar falling liquid films. J. of Fluid Mechanics, 743, 75-123, 2014.

Rohlfs, W., Madlener, R.: Multi-Commodity Real Options Analysis of Power Plant Investments: Discounting Endogenous Risk Structures. Energy Systems J., 5 (3), 423-447, 2014.

Tsvelodub, O., Rohlfs, W., Kneer, R.: Modeling of wave modes on a vertical film of a viscous ferromagnetic fluid flowing down a cylindrical electric conductor, Physics of Fluids, 25, 092101, 2013.

Rohlfs, W., Madlener, R.: Assessment of Clean-Coal Strategies: The Questionable Merits of Carbon Capture-Readiness Energy, 52, 27-36, 2013.

Rohlfs, W., Dietze, G., F., Haustein, D., Kneer, R.: Experimental investigation of 3-dimensional wavy liquid films under the coupled influence of thermo-capillary and electrostatic forces European Physics J. Special Topic, 219, 111-119, 2013.

Rohlfs, W., Haustein, H., Garbrecht, O., Kneer, R.: Insights into the local heat transfer of a submerged impinging jet: Influence of local flow acceleration and vortex-wall interaction Int. J. of Heat and Mass Transfer, 55, 7728-7736, 2012.

Haustein, H., Tebrügge, G., Rohlfs, W., Kneer, R.: Local heat transfer coefficient measurement through a visibly-transparent heater under jet-impingement cooling Int. J. of Heat and Mass Transfer, 55, 23-24, 6410-6424, 2012.

Haustein, H., Rohlfs, W., Al-Sibai, F., Kneer, R.: Evaluation of the Sensitivity and Response of IR Thermography from a Transparent Heater in the Case of Liquid Jet Impingement J. of Physics: Conference Series, 395, 012083, 2012.

Rohlfs, W., Dietze, Georg, F., Haustein, D., Kneer, R.: Two-phase electrohydrodynamic simulations using a volume-of-fluid approach: A comment. J. of Computational Physics, 231, 4454-4463, 2012.

Rohlfs, W., Dietze, G. F., Haustein, H. D., Tsvelodub, O., Kneer, R.: Experimental investigation of 3-dimensional wavy liquid films under the influence of electrostatic forces. Experiments in Fluids, 53 (4), 1045-1056, 2012.

Rohlfs, W., Madlener, R.: Valuation of CCS-ready coal-fired power plants: a multi-dimensional real options approach. Energy Systems J., 2 (3-4), 243-261, 2011.

 

Papers published in proceedings of professional conferences

Lienhard V, J. H., Thiel, G. P., Rohlfs, W.: Making desalination an energy efficient alternative. Proceedings Proceedings of the First Pacific Rim Thermal Engineering Conference, PRTEC, March 13th-17th, 2016, Hawaii’s Big Island, USA.

Hundhausen A., Rietz, M., Allelein, H.-J., Belt, A., Garbrecht, O., Kneer, R., Rohlfs, W.: Experimental assessment of single lens volumetric PIV with a commercial light field camera, Proceedings of the 11th International Symposium on Particle Image Velocimetry, PIV15, September 14th -16th , 2015, Santa Barbara, California, USA.

Rohlfs W., Jörg, J., Ehrenpreis, C., Rietz, M., Haustein, H., Kneer, R.: Flow Structures and heat transfer in submerged laminar jet impingement, TFESC-12816, Proceedings of the 1st Thermal and Fluids Engineering Summer Conference, TFESC-1, August 9th-12th, 2015, New York City, USA.

Rohlfs, W., Kneer, R., Scheid, B..: Influence of gravity and electrostatic surface forces on the onset of rolling waves and flow reversal in falling liquid films, Proceedings of the 7th International Berlin Workshop – IBW7 on Transport Phenomena with Moving Boundaries, October 30th-31st, 2014, Berlin, Germany, Published VDI Fortschritt-Bericht VDI Reihe 3, Verfahrenstechnik 947, Düsseldorf VDI-Verlag, 2015.

Rietz, M., Garbrecht, O., Rohlfs, W., Kneer, R.: Combined Three-Dimensional Flow- and Temperature Field Measurements Using Digital Light Field Photography, IHTC15-8605, Proceedings of the 15th International Heat Transfer Conference, IHTC-15, August 10th -15th , 2014, Kyoto, Japan.

Rohlfs, W., Ehrenpreis. C., Haustein, H.D., Garbrecht, O., Kneer, R.: Influence of local flow acceleration on the heat transfer of submerged and free-surface jet impingement, IHTC15-8378, Proceedings of the 15th International Heat Transfer Conference, IHTC-15, August 10th -15th , 2014, Kyoto, Japan.

Kneer, R., Haustein, H.D., Ehrenpreis, C., Rohlfs, W.: Flow Structures and Heat Transfer in Submerged and Free Laminar Jets, IHTC15-KN11, Proceedings of the 15th International Heat Transfer Conference, IHTC-15, August 10th -15th , 2014, Kyoto, Japan.

Haustein, H.D., Jörg, J., Rohlfs, W., Al-Sibai, F., Kneer, R.: Influence of Micro-scale Aspects and Jet-to-jet Interaction on Free-surface Liquid Jet Impingement for Micro-jet Array Cooling, Proceedings of the IEEE Intersociety Conference on Thermal and Thermomechanical Phenomena in Electronic Systems – ITHERM 2014, May 27th-30th, Orlando, FL, USA, 2014.

Haustein, H.D., Rohlfs, W., Al-Sibai, F., Kneer, R.: Development of Heat Transfer in a Two-Dimensional Wavy Falling Film of Water and its Influence on Wave Stability, Proceedings of the ASME Summer Heat Transfer Conference, Paper No. HT2013-17453 July 14th-19th, Minneapolis, MN, USA, 2013.

Rohlfs, W., Madlener, R.: Investment decisions under uncertainty: CCS competing with green energy technologies, Energy Procedia 37, 7029-7038, 2013 Proceedings of the 11th International Conference on Greenhouse Gas Technology – GHGT-11, November 18th-22nd, Kyoto, Japan.

Rohlfs, W., Haustein, H. D., Dietze, G. F., Kneer, R.: Experimental and numerical investigation of falling liquid films influenced by the presence of electric fields, Proceedings of the 6th International Berlin Workshop – IB63 on Transport Phenomena with Moving Boundaries, November 24th-25th, 2011, Berlin, Germany, Published VDI Fortschritts-Bericht VDI Reihe 3, Verfahrenstechnik 929, Düsseldorf VDI-Verlag, 2012.