An Enhanced Flux Treatment in Solving Incompressible Flow in a Forward-Facing Step

Document Type: Research Paper

Authors

1 Faculty of Mechanical Engineering, K.N. Toosi University of Technology, Tehran, Iran.

2 Islamic Azad University, Ahar Branch, Iran

Abstract

The aim of this paper is to give a detailed effect of several parameters such as step height, Reynolds number, contraction ratio, and temperature difference between the entrance and solid boundaries, of a forward-facing step. An accurate length of separation and reattachment zones are achieved. A finite-volume method (FVM) has been developed to study incompressible flow in a forward-facing step along with artificial compressibility technique. The governing equations are solved by time marching using a fifth-order Runge-Kutta time stepping. The proposed explicit finite volume method uses a new biasing discretization in space. The proposed model reveals that pressure and velocity fields are determinable in a wide range of Reynolds numbers up to 330 without artificial dissipation. The numerical results agree well with the available experimental and numerical data.

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