Computation of the flow in a ventilated room using non-linear RANS, LES and hybrid RANS/LES

The isothermal flow in an empty ventilated room is computed. Performances of linear and non‐linear RANS, LES and a hybrid RANS/LES (LNS) models are compared. When compared to linear equivalents, the non‐linear RANS models are found to modestly improve predicted velocities and Reynolds stresses. Gene...

Full description

Saved in:
Bibliographic Details
Published in:International journal for numerical methods in fluids 2005-05, Vol.48 (1), p.99-106
Main Authors: Jouvray, Alexandre, Tucker, Paul G.
Format: Article
Language:English
Subjects:
Applied sciences
Building technical equipments
Buildings
Buildings. Public works
Computational methods in fluid dynamics
Environmental engineering
Exact sciences and technology
Fluid dynamics
Fundamental areas of phenomenology (including applications)
hybrid RANS/LES
LNS
non-linear eddy-viscosity RANS
Physics
room-ventilation
turbulence
Turbulence simulation and modeling
Turbulent flows, convection, and heat transfer
Ventilation. Air conditioning
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:The isothermal flow in an empty ventilated room is computed. Performances of linear and non‐linear RANS, LES and a hybrid RANS/LES (LNS) models are compared. When compared to linear equivalents, the non‐linear RANS models are found to modestly improve predicted velocities and Reynolds stresses. Generally, best agreement is found between measurements and LES. Also, the LNS appears a promising model, giving the best velocity agreement and overall good agreement with measured Reynolds stresses. However, the method has the potential for LES zones to occur downstream of RANS zones. This gives rise to poor LES boundary conditions. Hence the current LNS results could be fortuitous. Copyright © 2005 John Wiley & Sons, Ltd.
ISSN:0271-2091
1097-0363
DOI:10.1002/fld.945