Numerical Simulation of Atmospheric Boundary Layer Over Laboratory Scale Two-Dimensional Hill Using Pressure-Driven Boundary Condition

The atmospheric boundary layer (ABL) is the lowest part of the atmosphere directly impacted by the earth's surface. ABL simulation is essential for predicting wind load, pollutant dispersion, and wind capacity over a terrain. ABL can be modeled using the computational fluid dynamics (CFD) tool. Maintaining horizontal homogeneity is critical for a more accurate ABL simulation. Researchers have proposed various boundary conditions for obtaining homogeneously homogeneous ABL. This study investigates pressure-driven boundary conditions for the atmospheric boundary layer over a laboratory-scale two-dimensional (۲D) hill. For complex terrains, such as a ۲D hill, the numerical analysis of pressure-driven flow has not yet been considered. The validation was done using the experimental results from the ERCOFTAC ۶۹ case, namely a simplified ۲D hill. The results are also compared with the shear-driven boundary conditions. The results of simulations of ABL employing pressure-driven boundary conditions using different turbulence models have also been compiled. From MAPE analysis, it is found that the results of ABL simulation using pressure-driven boundary conditions produced lower MAPE values, resulting in superior outcomes compared to the shear-driven boundary conditions.

Keywords:

Turbulence Modeling , OpenFOAM , Atmospheric boundary layer , RANS , Boundary conditions