Effects of Reduced Mesh Resolution on Large Eddy Simulations of Atmospheric Boundary Layer Flow
This study explores simulation of turbulent atmospheric boundary layer (ABL) flow felds using reduced mesh resolution as a means for reducing time and computational requirements.
A full resolution simulation is performed using previously developed flow felds, within OpenFOAM, in an effort to reproduce the statistical results of the original study. The reduced resolution simulation is run on a personal computer (PC) and the results are compared to the full resolution simulation as well as the original study. As previously observed, the sub-grid scale (SGS) model produces
inaccurate results near the ground and a large z-component of the velocity gradient still exists.
There is a exacerbation of these issues within the reduced resolution simulation, but the increase
in variance and vertical velocity gradient is more pronounced.