Application of a Large Eddy Simulation Model to Study Room Airflow.
Application of a Large Eddy Simulation Model to Study
Emmerich, S. J.; McGrattan, K. B.
ASHRAE Transactions, Vol. 104, No. 1, 1-9, 1998.
air flow; computational fluid dynamics; turbulence;
simulation; ventilation; mathematical models
A three-dimensional, large eddy simulation (LES) model
developed for studying the transport of smoke and hot
gases during afire in an enclosure is described. The
model uses finite digerence techniques to solve the
Navier-Stokes equations with an approach emphasizing
high spatial resolution and efficient flow-solving
techniques. The model uses the Smagorinsky subgrid-scale
model. The LES model with Smagorinsky subgrid-scale
model was applied to ventilation airflow in a
three-dimensional room. Airflow results were in
excellent agreement with both measured values and LES
simulations with the more complicated, dynamic SGS model
(reported by Davtdson and Nielsen 1996) in the main
portion of the room. Agreement was not as good near the
floor and ceiling; however, no empirical near-wall model
was used. Also, some interaction between Smagorinsky
constant and grid resolution was found.