Wall-modeled large-eddy simulations on non-body-conforming cartesian grids: Analysis of the conservation laws

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)

Abstract

To realize wall-modeled large-eddy simulations on Cartesian grids, a wall-boundary condition for non-body-conforming grids is developed. A slip-wall velocity boundary condition is introduced to reduce the error of the conservation law caused by the under-resolved velocity profile near the wall boundary. Corresponding to the slip velocity, the stress balance near the wall boundary is analyzed. To satisfy the stress balance, an anisotropic expression of the viscous-stress tensor is introduced that tends not to inhibit the wall-normal mixing by the turbulence. In the simulation of the flat-plate turbulent boundary layer, the result obtained by the developed wall-boundary condition shows a significant improvement from the results using the non-slip boundary condition in predicting both velocity and Reynolds shear stress profiles in the boundary layer.

Original languageEnglish
Title of host publicationAIAA Scitech 2020 Forum
PublisherAmerican Institute of Aeronautics and Astronautics Inc, AIAA
ISBN (Print)9781624105951
DOIs
Publication statusPublished - 2020
EventAIAA Scitech Forum, 2020 - Orlando, United States
Duration: 2020 Jan 62020 Jan 10

Publication series

NameAIAA Scitech 2020 Forum
Volume1 PartF

Conference

ConferenceAIAA Scitech Forum, 2020
CountryUnited States
CityOrlando
Period20/1/620/1/10

ASJC Scopus subject areas

  • Aerospace Engineering

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