Developing numerical wall function for large eddy simulation using eddy – viscosity models in the embedded RANS domain

B. E.O. Iyamabo, I. Afgan, D. Laurance, A. Revell

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

– This paper presents the methodology of a new wall function for large eddy simulation (LES). The numerical wall function for LES simulates two regions of the flow domain concurrently. The first region covers the entire flow domain and solves LES transport equations, and the grid is coarse in the near-wall region. The second region is much smaller and covers the near-wall area of the LES grid. The second region solves transient Reynolds Averaged Navier Stokes (RANS) transport equations and supplies the LES grid with wall shear stress information. In return, the RANS grid receives partial time-averaged quantities from the LES grid enabling the use of more advanced turbulence models in the RANS domain. The paper also presents results of testing the new method in a plane channel flow and a pipe bend geometry.

Original languageBritish English
Title of host publicationTHMT 2018 - Proceedings of the 9th International Symposium on Turbulence Heat and Mass Transfer
PublisherBegell House Inc.
Pages735-738
Number of pages4
ISBN (Electronic)9781567004687
DOIs
StatePublished - 2018
Event9th International Symposium on Turbulence Heat and Mass Transfer, THMT 2018 - Rio de Janeiro, Brazil
Duration: 10 Jul 201813 Jul 2018

Publication series

NameProceedings of the International Symposium on Turbulence, Heat and Mass Transfer
Volume2018-July
ISSN (Electronic)2377-2816

Conference

Conference9th International Symposium on Turbulence Heat and Mass Transfer, THMT 2018
Country/TerritoryBrazil
CityRio de Janeiro
Period10/07/1813/07/18

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