أثر محاسبة الأصول المعنوية على تقييم الأداء المالي

Abstract

In this thesis, we numerically study a flow around a two-dimensional obstacle using the technique of computational fluid dynamics (CFD). Navier-Stockes equations with several turbulence models are studied to evaluate the performance of ANSYS CFX. The assessment is based on the comparison of experimental results (CEDVAL 1-3) produced in a wind tunnel at the Metrological Institute of the University of Hamburg. Our main objective is to find the appropriate turbulence model for the simulation of a complex flow in the presence of separation and reattachment. We consider five turbulence models, namely the standard k-ε turbulence model, the feasible k-ε model, the k-ε RNG model, the standard k-ω model and the k-ω (Shear Stress Transport) SST model. Adequate meshes are used to meet the required criteria (the y+ approach) for each turbulence model.