Abstract Numerical modeling of thermophysical processes in the air cooling channel titanium sponge reduction reactor is performed. The an area bounded by a retort filled with liquid magnesium and wall on which heating elements are mounted. Air flows inside channel, retort. A mathematical model constructed based unsteady Navier-Stokes equations axisymmetric formulation using k −ω SST turbulence ...

Abstract A computational study of a supersonic flow in the base region and nearest wake cylindrical body moving at speed has been carried out. In this case, “prehistory” was taken into account, i.e. configuration domain as close possible to real one. The use various RANS turbulence models for calculating analyzed. following were considered: 1) SST model; 2) Standard k– ε 3) RNG 4) Reynolds Stre...

This paper presents the reverse hinge spoiler, a novel spoiler concept, for flight load control. The is control surface mounted on upper of wing. Unlike conventional hinged spoilers that are at their front and rotate forward toward leading edge wing, proposed concept its rear rotates backward trailing aerodynamic performance compared contrasted with different conditions locations using two-dime...

In turbulent mixed convection conditions, flow and heat transfer can deteriorate under specific thus affecting the performance of safety system, which could imperil nuclear reactor. this paper, by analyzing velocity, temperature distributions, other thermal-hydraulic parameters, steady-state computational fluid dynamics approach with SST k–? turbulence model used in study was verified. Then, ch...

The reduction of energy consumption cars is always a significant issue in automotive design. Turbulent flow around car body very difficult to simulate accurately due the complexity conditions body, such as complex separation and laminar turbulent transition. In particular, over Ahmed with rear angle 25o considered challenging problem for RANS approach two-equation turbulence models. this study,...

Abstract The objective of this paper is to experimentally and numerically investigate the transient cavitation flow during startup process mixed pump with emphasis on studying influence blade numbers. simulation was studied based improved SST k-ω turbulence model Zwart model. Firstly, in order obtain relationship between rate variation rotational speed at startup, a theoretical analysis fast tr...

Reynolds-Averaged Navier-Stokes (RANS) methods have become an important design tool in aerospace industry. Turbulence models, which are required for closure of the RANS equations, are a substantial component in these methods. Several flow regimes exist where the accuracy of flow predictions depends strongly on the turbulence model used. Turbulence has a major influence on the growth rate of bou...