Application of a large eddy simulation model to study room airflow

Conference · Thu Oct 01 04:00:00 EDT 1998

OSTI ID:649443

Emmerich, S J; McGrattan, K B ^[1]

---

1. National Inst. of Standards and Technology, Gaithersburg, MD (United States). Building and Fire Research Lab.

A three-dimensional, large eddy simulation (LES) model developed for studying the transport of smoke and hot gases during a fire in an enclosure is described. The model uses finite difference 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 Davidson 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.

• OSTI ID: 649443
• Report Number(s): CONF-980123--
• Country of Publication: United States
• Language: English

Related Subjects

32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
AIR FLOW
BUILDINGS
FINITE DIFFERENCE METHOD
FLOW MODELS
INDOOR AIR POLLUTION
N CODES
THREE-DIMENSIONAL CALCULATIONS
VENTILATION