Numerical study on air-conditioned indoor airflow by dynamic large eddy simulation.

The aim of this research is to apply dynamic Large Eddy Simulation (LES) to predicting the complex turbulent flow field in an air-conditioned room. LES is a method to calculate turbulent flows where only the small-scale (subgrid-scale) motions are modelled and the large-scale (grid-scale) motions are computed directly. Recently, a dynamic subgrid-scale model has been developed that can evaluate a model coefficient dynamically. This paper presents a numerical simulation of LES with a dynamic mixed subgrid-scale model of a flow field in an air-conditioned room model. A full-scale model experiment is also carried out for comparison with the computational results. The distribution of the velocity field is measured with a three-dimensional ultrasonic anemometer. Good agreement between the computational and experimental results is found for time-averaged velocity and Reynolds stress.