Investigation of mass transfer in a system of impinging jets with focus on homogeneity

• Applicant: Professor Dr.-Ing. Wilhelm Schabel
• Subject Area: Chemical and Thermal Process Engineering
• Term: from 2013 to 2016
• Project identifier: Deutsche Forschungsgemeinschaft (DFG) - Project number 230617660

• Final Report Year: 2016

Final Report Abstract

The heat transfer coefficient distribution under arrays of impinging jets, with and without removal of the spent fluid has been investigated. We used numerical and experimental methods to show that due to removal of the spent fluid the cross-flow effect can be minimized and unit cells can be created. Furthermore, an array structure “CN12” has been found, that allows for maximum homogeneity of the heat transfer coefficient at target plate. This system has been fully characterized for a wide range of Reynolds numbers and separation distances.

Publications

• Numerical and experimental investigation of the heat transfer coefficient distribution at target plate under an array of impinging jets with local removal of the spent fluid. European Coating Symposium 2013, 11. – 13.09.2013, Mons, Belgium
  P. Cavadini, P. Scharfer, W. Schabel
  
• Entwicklung eines Prallstrahlsystems zur homogenen und definierten Trocknung mittels experimenteller und numerischer Methoden. Jahrestreffen der ProcessNet Fachgruppe Trocknungstechnik, 19.-21. Februar 2014, Karlsruhe, Germany
  P. Cavadini, P. Scharfer, W. Schabel
  
• Numerical and experimental investigation of the heat transfer coefficient distribution under an array of impinging jets with local removal of the spent fluid. Proceedings of the 15th International Heat Transfer Conference, IHTC-15, August 10th -15th , 2014, Kyoto, Japan, IHTC15-8875, 2014
  Cavadini, P., Scharfer, P., Schabel, W.
  
• Untersuchung der Verteilung des Wärmeübergangskoeffizienten in Prallstrahlsystemen mit lokaler Absaugung. ProcessNet- Fachausschuss Wärme- und Stoffübertragung, 24.-25.03.2014, Fulda, Germany
  P. Cavadini, P. Scharfer, W. Schabel
  (See online at https://doi.org/10.1002/cite.201450383)
• Local heat transfer characteristics of a slot nozzle array for batch drying of thin films under industrial process conditions. Journal of Coatings Technology and Research 12 (5), 915–920, 2015
  Baunach, M., Jaiser, S., Cavadini, P., Scharfer, P., Schabel, W.
  (See online at https://dx.doi.org/10.1007/s11998-015-9712-1)