Numerical and experimental investigation of the turbulent flow and mixing in a static T-mixer
Peukert W, Schwertfirm F, Manhart M, Gradl J, Schwarzer HC (2006)
Publication Language: English
Publication Status: Published
Publication Type: Conference contribution, Conference Contribution
Publication year: 2006
Publisher: ASME
City/Town: Miami, Florida
Book Volume: 2006
Pages Range: 1101-1110
Conference Proceedings Title: ASME 2006 2nd Joint U.S.-European Fluids Engineering Summer Meeting Collocated With the 14th International Conference on Nuclear Engineering
Event location: Miami, FL
ISBN: 0-7918-4750-0
Abstract
Turbulent mixing plays an important role in chemical engineering, especially when the chemical reaction is fast compared to the mixing time. In this context a detailed knowledge of the flow field, the distribution of turbulent kinetic energy (TKE) and its dissipation rate is important, as these quantities are used for many mixing models. For this reason we conduct two direct numerical simulations (DNS) of a confined impinging jet reactor (CIJR) at Re = 500 and Sc = 1, with and without modelling the feeding pipes. The data is compared with particle image velocimetry (PIV) measurements and it is shown that only the simulation which includes the feeding pipes gives the correct flow field. This flow field is dominated by a stable vortex in the main mixing duct. High intensities of turbulent kinetic energy and dissipation are found in the impingement zone and decrease rapidly towards the exit of the CIJR. In the whole CIJR the turbulence is not in equilibrium. The mixing of the scalar is rapid in the impingement zone, but due to the fast decrease of the turbulent intensities and due to the relaminarisation of the flow the PDFs of the scalar distributions in cross sections of the CIJR take a bimodal form after the impingement zone. Copyright © 2006 by ASME.
Authors with CRIS profile
Wolfgang Peukert
Lehrstuhl für Feststoff- und Grenzflächenverfahrenstechnik
Michael Manhart
Lehrstuhl für Informatik 14 (Bild- und Sprachverarbeitung)
Involved external institutions
Germany (DE)How to cite
APA:
Peukert, W., Schwertfirm, F., Manhart, M., Gradl, J., & Schwarzer, H.-C. (2006). Numerical and experimental investigation of the turbulent flow and mixing in a static T-mixer. In ASME (Eds.), ASME 2006 2nd Joint U.S.-European Fluids Engineering Summer Meeting Collocated With the 14th International Conference on Nuclear Engineering (pp. 1101-1110). Miami, FL, US: Miami, Florida: ASME.
MLA:
Peukert, Wolfgang, et al. "Numerical and experimental investigation of the turbulent flow and mixing in a static T-mixer." Proceedings of the 2006 2nd ASME Joint U.S.-European Fluids Engineering Summer Meeting, FEDSM 2006, Miami, FL Ed. ASME, Miami, Florida: ASME, 2006. 1101-1110.
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