Atmospheric Boundary Layer Simulation Using Wall Function Approach in OpenFoam CFD Software

Abstract

The significant development in computer resources in the past years has increased the awareness of computational fluid dynamics as an alternative tool to the costly wind tunnel testing. The paper presented the application of CFD technique for a case study in simulating an existing site together with a proposed building and the local landscape. Finally, the limitations of the code analytical methods to the CFD method for wind around building analysis were discussed. From the result obtained, it was observed that the British standard (BS6399-2:1997) procedures are based on general assumptions and are not always conservative and do not provide accurate wind load results due to complex geometrical shapes, aerodynamic interaction, torsion, and load combinations as discussed in section VII.

CFD Analysis of Wind-Driven Natural Ventilation in Building Models

“…For the ground, a rough wall boundary condition was imposed. According to [9], in open foam CFD codes, the logarithmic law with sand grain roughness parameter is expressed as follows:…”