Abstract The accuracy of wind flow simulation in mountain area micro-topography is related to discrete scheme, turbulence model and wall function. In this paper, the standard hill adopt analyze calculation different models. Four models, including RNG k-ε, k-ω , SST TSST were used calculation, compared with result tunnel test. results second-order upwind or scalable function are basically consis...

CCHE3D model is developed at the National Center for Computational Hydroscience and Engineering, The University of Mississippi, for simulating unsteady, free surface, three-dimensional turbulent flows and sediment/pollutant transport and water quality. This model is based on Efficient Element Method, a collocation version of the Galerkin approach. The basic element is a cube with twenty-seven n...

In this study, the numerical analysis of turbulent flow and heat transfer of double pulsating impinging jets on a flat surface has been investigated. The unsteady two-dimensional numerical solution for two similar and dissimilar jets was performed using the RNG k-ε model. The results showed that the RNG k-ε model has more satisfactory predictions of the Nusselt number distribution. Comparisons ...

Bu çalışmada, çatı eğim açısının 15°, 30° ve 45° saçak 0°, 30°, 60° olduğu beşik çatılı alçak bina modelleri etrafında sürekli rejimdeki üç boyutlu akış alanları, Reynolds sayısının 40000 değeri için Standard k-ε, RNG k-ε Realizable türbülans ile hesaplanmıştır. Çatı açılarındaki değişikliğin basınç dağılımları üzerindeki etkisi model yüzeylerinde ortalama katsayısı şeklinde incelenmiştir. Sayı...

In numerous industries such as drilling, peening, cleaning, etc., a cavitating jet is adopted. However, it challenging to simulate the flow field numerically with accuracy. The of organ pipe cavitation nozzle simulated in this research using RNG k−ε, DES, and LES turbulence models. model can more accurately predict periodic shedding cloud, which basically consistent morphology captured high−spe...