in this research, the effect of surface roughness and bubble injection on skin friction and hydrodynamic drag force has been numerically considered. this research is based on taylor-couette flow. considered flow includes two concentric cylinders which internal cylinder is movable and external is immovable. the effective equations on the flow includes: equations of momentum, continuous, turbulen...

A numerical study based on two-fluid model describes the thermal and fluid-dynamic behaviour of the two-phase flow inside ducts -condensers and evaporators-. The discretization of the governing equations has been developed by means of the finite volume technique using a staggered mesh. A semi-implicit pressure based method SIMPLE-like is used to solve the pressure distribution, the velocity fie...

Abstract: This paper proposed three-dimensional numerical simulation method by coupling of electrostatic and fluid fields to evaluating the performance of electrical sensor in the concentration measurement of gas/solid two-phase flow. Compared with the static numerical simulation, this real-time dynamic 3-D simulation method can research on a designed capacitance sensor combining the dynamic ch...

basic understanding of the process of coolant heat transfer inside an engine is an indispensable prerequisite to devise an infallible cooling strategy. coolant flow and its heat transfer affect the cooling efficiency, thermal load of heated components, and thermal efficiency of a diesel engine. an efficient approach to studying cooling system for diesel engine is a 3d computational fluid dynami...

We propose a two-phase model having a Newtonian rheology for the fluid phase and friction for the particle phase to describe bed-load transport in laminar pipe flows. This model is able to provide a description of the flow of the mobile granular layer. When the flow is not significantly perturbed, simple analytical results of the particle flux varying cubically with the Shields number can be ob...

The two-fluid (Euler–Euler) model and large-eddy simulation are used to compute the turbulent two-phase flow of air water in a cyclonic flotation device known as an Air-Sparged Hydrocyclone (ASH). In operation ASH, is injected through porous cylindrical wall. study considers 48 mm diameter hydrocyclone uses block-structured fine mesh 10.5 million hexagonal elements. air-to-water injection ratio...