Two-equation turbulence models, such as the k–epsilon (k–ε) and shear stress transport (SST) have limited accuracy in calculating film cooling effectiveness. Previous studies focused on modifying turbulent Prandtl number from perspective of thermal diffusion to improve prediction simulations. However, flow jet is crucial for simulating cooling. The calculated effectiveness differs experimental ...

The aim of our study is to analyze the impact of insertion holes in the middle of obstacles on the flow around a surface-mounted cube, In order to do this; we studied four configurations of obstacles in a channel with a Reynods number based on obstacle height ReH = 40000. The hexahedral structured meshes were used to solve the fluid dynamics equations .The finite volume method are employed to s...

Abstract The paper presents an investigation of the slip length effect on flow around a circular cylinder at Reynolds number Re = 2.5·10 5 . study was performed by means numerical simulation with URANS approach based k -ω SST model. Calculations show significant patterns. With increase in length, drag coefficient noticeably decreases and pulsations lift force reduce. separation from is delayed,...

Abstract The paper focuses on implementing the wall model developed by Manhart, in Reynolds Averaged Navier - Stokes (RANS) turbulence models used field of Computational Fluid Dynamics (CFD). This considers influence streamwise pressure gradient addition to existing usual CFD codes. In present work, two RANS numerical simulations are carried out using k-ω Shear Stress Transport (SST) an asymmet...

We calibrate the k-ωSST turbulence model for free surface flows in channel or on slope using machine learning techniques. To model, an experiment is carried out inclined rectangular research chute. In experiment, pressure values flow are measured at different distances from bottom; after transforming data, velocity profile obtained. The calibrated based experimental data Nelder-Mead optimizatio...