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Study of Heat and Mass Transfer in Complex Mixing devices using a Hybrid LES-Monte-Carlo PDF Method

DOI: 10.1615/ICHMT.2006.TurbulHeatMassTransf.1170
pages 557-560

Clemens Olbricht
Department of Energy and Powerplant Technology, Darmstadt University of Technology, Petersenstr. 30, 64287 Darmstadt, Germany

Amsini Sadiki
Institute of Energy and Power Plant Technology, Technische Universität Darmstadt, 64287 Darmstadt, Germany

Johannes Janicka
Institute of Energy and Power Plant Technology, TU Darmstadt, Jovanka-Bontschits-Strasse 2, 64287 Darmstadt, Germany; Darmstadt Graduate School of Excellence Energy Science and Engineering, TU Darmstadt, Jovanka-Bontschits-Strasse 2, 64287 Darmstadt, Germany

Jyh-Yuan Chen


Abstrakt

This contribution introduces a hybrid LES-Monte-Carlo method for a coupled solution of the flow and the multi-dimensional scalar joint pdf in two complex mixing devices. For this purpose an Eulerian Monte-Carlo method is used. First, a complex mixing device (jet-in-crossflow, JIC) is presented in which the stochastic convergence and the coherency between the scalar field solution obtained via finite-volume methods and that from the stochastic solution of the pdf for the hybrid method are evaluated. Results are compared to experimental data. Secondly, an extensive investigation of the micromixing on the basis of assumed shape and transported SGS-pdfs in a configuration with practical relevance is carried out. This consists of a mixing chamber with two opposite rows of jets penetrating a crossflow (multi jet-in-crossflow, MJIC). Some numerical results are compared to available experimental data and to RANS based results.

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