This paper presents a computational study of the separated flow in a planer asymmetric diffuser. The steady RANS equations for turbulent incompressible fluid flow and six turbulence closures are used in the present study. The commercial software code, FLUENT 6.3.26, was used for solving the set of governing equations using various turbulence models. Five of the used turbulence models are availa...

Isothermal turbulent flow around circular cylinders arranged side-by-side was numerically simulated on a commercial finite-volumes platform, ANSYS® CFX, version 2020 R2. The turbulence modeled by using k-ω shear stress transport (k-ω SST). Three different Reynolds numbers were computed, Red = 200, 1000, and 3000, which based the cylinder diameter, d, free stream velocity, U∞, kinematic viscosit...

Abstract In order to study the influence of deformations nozzle’s flexible sections on its inner wall’s heat transfer, this research uses two-dimensional axisymmetric model and k − ω SST turbulence numerically analyze tail flow field flexible-extendible nozzle under multiple working conditions. The transfer with without are simulated analyzed. simulation results show that when deformed, new sho...

As one of the typical negative factors affecting vortex structure and flow characteristics hydraulic machinery, TLV has a non-negligible impact on energy performance. In order to improve utilization efficiency machinery in marine energy, parallel grooves is proposed applied NACA0009 hydrofoil. Subsequently, an exhaustive numerical analysis carried out adopting SST k-ω turbulence model, effects ...

Some areas of the Lanzhou-Xinjiang Railway are accompanied by strong crosswinds all year. The lateral force it generates pose a threat to safe operation railway freight trains. This paper conducts numerical simulation study on three trains under five crosswind angles using CFD method in order aiming at relationship between angle and aerodynamic force. SIMPLE algorithm is used solve Reynolds-ave...

Abstract Computational fluid dynamics analysis of a building plan has been investigated with predominant wind velocity for different directions. The flow properties’ variation in the computational domain modeled by solving Reynolds-Averaged Navier–Stokes (RANS) equations finite volume second-order discretization scheme. turbulence airflow distribution and around Shear Stress Transport (SST) k–ω...

This paper explores the response of the tropical hydrologic cycle to surface warming through the lens of large-domain cloud-system-resolving model experiments run in a radiative–convective equilibrium framework. Simulations are run for 55 days and are driven with fixed insolation and constant sea surface temparatures (SSTs) of 298 K, 300 K, and 302 K. In each experiment, convection organizes in...

The effect of supersonic air temperature on the mixing characteristics liquid hydrocarbon fuel injected into three different airflows elevated in steps from 373 K to 673 was investigated numerically. Compressible Reynolds-averaged Navier–Stokes (RANS) equations were solved together with species conservation equation using ANSYS Fluent for two-phase flow simulations including droplet breakup and...

The unsteady separated turbulent flow around an oscillating airfoil pitching in a sinusoidal pattern in the regime of low Reynolds number is investigated numerically employing the URANS approach with two advanced turbulence models, namely the RNG kmode and Transition SST model, and the DES approach based on the SST kmodel. A comparison with experimental data shows that the SST kbased D...