Numerical and Experimental Studies on Selfsustaining Equilibrium Atmosphere Boundary Layer

Abstract:

In this study, computational fluid dynamics(CFD) simulation is compared with results from the wind tunnel test. The good agreement of wind profile between simulation and wind tunnel test confirms the validation and precision of the CFD simulation.A comparative study is made of the impact of Y+ on the simulation results between CFD simulation and wind tunnel test.The study reveals that validation of CFD simulation relies on fine grid system near the wall.A numerical experiment which modeled an infinitely long wind tunnel is conducted using CFD and the profile of a selfsustaining equilibrium atmosphere boundary layer is obtained.The result shows the simulated wind profile differs from those commonly used in computational wind engineering. Thus, a further study is necessary to analyze the nature of the difference.

Key words:computational fluid dynamics; equilibrium atmosphere boundary layer; horizontal homogeneity; wind tunnel test