Skip to main content
U.S. flag

An official website of the United States government

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

Application of a Large Eddy Simulation Model to Study Room Airflow.



Steven J. Emmerich, Kevin B. McGrattan


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.
ASHRAE Transactions
Publisher Info
, -1


air flow, computational fluid dynamics, turbulence, simulation, ventilation, mathematical models


Emmerich, S. and McGrattan, K. (1998), Application of a Large Eddy Simulation Model to Study Room Airflow., ASHRAE Transactions, , -1, [online], (Accessed June 15, 2024)


If you have any questions about this publication or are having problems accessing it, please contact

Created January 1, 1998, Updated June 2, 2021