Numerical investigation of mixture generation due to different inlet and outlet positions

Numerical simulation is a method used to carry out a study of the flow characteristics of compressible fluid through different channels. Two approaches using the air as a working substance were used to study the flow characteristics. In the first approach, two inlets and one outlet horizontally in x direction were intended to generate different flow characteristics with the flow properties calculated along diagonal lines inside the channel. In the second approach, one inlet and outlet horizontally with sudden change in the area of the channel was employed. In this research, the flow pr1operties were calculated along the centre line inside the channel and the flow fields have been investigated. A non-linear k-ε model was employed to solve the flow characteristics by using the finite difference method with a curvilinear coordinate system near the dead zone. The k-ε and Reynolds stress model are semi-empirical models based on the equations of transport that contain of dissipation rate (ε) as well as turbulent kinetic energy (k). The turbulent kinetic energy and its rate of dissipation is derived from the Navier-Stokes equation. In this work, the simulation outcomes of proposed k-ε turbulence model indicated good compatibility with published correlations. In order to get an accurate solution, the value of 10-8 for maximum normalised equation residual was considered to be the converging between computation and steady solution. The model applied for flow velocity 30 m/s and the obtained results presented as curves, surface and contours for velocities turbulent kinetic energy, rate of dissipation of turbulent kinetic energy and vortices. The builder model can be utilised for academic purposes since it can be widely used for many physical and engineering applications.