Title: Numerical simulation of particle-laden turbulent flows using LES
Authors: Breuer, Michael  
Alletto, Michael 
Language: eng
Issue Date: Aug-2012
Editors: Nagel, Wolfgang E.
Publisher: Springer
Document Type: Conference Proceedings
Source: In: High performance computing in science and engineering '11 / Nagel, Wolfgang E.. - Heidelberg [u.a.] : Springer, 2012 . - 2012, Seite 337-352
Page Start: 337
Page End: 352
Published in (Book): High performance computing in science and engineering '11 : transactions of the High Performance Computing Center, Stuttgart (HLRS) 2011 ; [15th [i.e. 14th]] Annual Results and Review Workshop on High Performance Computing in Science and Engineering
Publisher Place: Heidelberg
© 2012 Springer-Verlag Berlin Heidelberg. All rights are reserved. The paper is concerned with the simulation of particle-laden two-phase flows based on the Euler-Lagrange approach. The methodology developed is driven by two compulsory requirements: (i) the necessity to tackle complex turbulent flows by eddy-resolving schemes such as large-eddy simulation (LES); (ii) the demand to predict dispersed multiphase flows at high mass loadings. First, a highly efficient particle tracking algorithm was developed working on curvilinear, block-structured grids in general complex 3D domains. Second, to allow the prediction of dense two-phase flows, the fluid-particle interaction (two-way coupling) as well as particle-particle collisions (four-way coupling) had to be taken into account. For the latter instead of a stochastic collision model, in the present study a deterministic collision model is considered. Nevertheless, the computational burden is minor owing to the concept of virtual cells, where only adjacent particles are taken into account in the search for potential collision partners. The methodology is applied to different test cases. Here results of the two-phase flows in a plane channel and in a model combustion chamber are reported. The influence of particle-fluid (two-way coupling) as well as particle-particle interactions (four-way coupling) is investigated for a mass loadings of 22%. The computational results are compared with experimental measurements and an encouraging agreement is found. Results for a higher mass loading of 110% will be published in a subsequent report. The methodology developed will be further extended in the near future, e.g., to account for rough walls. Then even more challenging test cases will be tackled.
Organization Units (connected with the publication): Strömungsmechanik 
ISBN: 9783642238697
Publisher DOI: 10.1007/978-3-642-23869-7_25
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