Evaluation of CFD URANS Turbulence Models for the Building under Environmental Wind Flow with Experimental Validation

Wind flow on and around buildings attains more importance among architectures, builders, urban planners, structural engineers, wind engineers. tunnel experiments assessments of full-scale are expensive complex in varied terrain conditions. Hence, flows extensively assessed using Computational Fluid Dynamics (CFD). By following the turbulence parameters, CFD models create atmospheric environments. No literature has till elucidated which model is suitable for predicting high-rise buildings. The efficiency models, their performance, accuracy must be validated with experimental results, indispensable before practice. Therefore, this investigation aims to validate Unsteady Reynolds–Averaged Navier-Stokes (URANS) simulations a setback tall building under open conditions enclosed within dimensions. URANS simulation accompanied Standard k– ε, Realizable k-ε, RNG k–ω, k–ω SST RSM. k –ω RSM have reproduced pressure coefficients observed from tunnel. However, all failed produce same velocity profiles at downstream recirculation, as they vary sampling time. transient feature, RMS (Root Mean Square), better by while most unsteady features like across spectra eddies were captured Realizable, iso-surface. predict similar results experiment. Where less computational time was required SST, it promising that provides both mean encouraging accurate