The wind loads considerably influence lightweight spatial structures. An example of spatial structures is scallop domes that contain various configurations and forms and the wind impact on a scallop dome is more complex due to its additional curvature. In our work, the wind pressure coefficient (Cp ) on the scallop dome surface is studied numerically and experimentally. Firstly, the programming...

Somatostatin (somatotropin release-inhibiting factor [SRIF]) is known to modulate the excitability of retinal ganglion cells, but the membrane mechanisms responsible and the extent to which intracellular calcium signaling is affected have not been determined. We show that somatostatin receptor subtype 4 (sst(4)) is expressed specifically in rat ganglion cells and that the generation of repetiti...

The underexpanded microjet emerging from a rectangular convergent nozzle with high aspect ratio at the exit is investigated numerically using Reynolds-averaged Navier-Stokes (RANS) simulation Menter’s shear stress transport (SST) k-ω turbulence model. performed pressure of 5.0 to produce strong shock and it validated by comparison rainbow schlieren picture microjet. three-dimensional structure ...

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...

In order to measure flow rate in open channels, including irrigation hydraulic structures are used with a relatively high degree of reliance. Venturi flumes among the most common and efficient type, they can discharge using only water level at specific point within converging section an empirical relationship. There have been limited number attempts simulate venturi flume computational fluid dy...