TY - JOUR ID - 2268 TI - Numerical Modeling of Wind Distribution Around a Tall Building in a 3D Urban Environment JO - Renewable Energy Research and Applications JA - RERA LA - en SN - 2717-252X AU - Ahmadi, M. AU - Mirjalily, S.A.A. AU - Oloomi, Seyed A. A. AD - Department of mechanical engineering, Yazd Branch, Islamic Azad University, Yazd, Iran. Y1 - 2022 PY - 2022 VL - 3 IS - 1 SP - 93 EP - 102 KW - Hybrid RANS-LES approach KW - Wind Distribution KW - Tall Building KW - Bluff Body KW - Pressure Distribution DO - 10.22044/rera.2021.11110.1073 N2 - This study applies an appropriate turbulence model to simulate the wind distribution in a 3D urban area around a tall building as a bluff body which is one of the most important research topics due to the increasing concerns about human health risks due to air pollution in recent decades. Hybrid RANS/LES approach, was used to reduce computation time while maintaining computational accuracy. On the other hand, since no homogeneous direction exists in the flow in the Hybrid (RANS-LES) approach, the LES and Smagorinsky Sub Grid-Scale (SGS) approach are implemented with the standard k-ε turbulence model as RANS. To obtain more accurate results, the second-order Van Leer Method (VLM) was employed in advection terms. The sensitivity study of the input parameters shows that the intensity of the input turbulence has a significant effect on the surface pressure fluctuations. The results of velocity and pressure distribution showed a very close agreement to wind tunnel experimental data. Finally, the effects of the inflow characteristics on the peak pressure on the lateral sides is also studied. As the results, fluctuation pressure distribution was strongly dependent on the turbulence of the flow. UR - https://rera.shahroodut.ac.ir/article_2268.html L1 - https://rera.shahroodut.ac.ir/article_2268_ca3887f424fc5c96be88704b1f0443ba.pdf ER -