A numerical simulation is a method carried out to study the flow characteristics of compressible fluid through different channels. Two approaches using air as a working substance were used to study the flow characteristics. In the first approach, two inlets and one outlet horizontally in the x direction was depended on to generate different flow characteristics; the flow properties were calculated along the diagonal line 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 properties were calculated along the center line inside the channel and the flow fields have been investigated. A non-linear k-Є model is employed to solve the flow characteristics by using the finite difference method with a curvilinear coordinate system near the dead zone and the k-Є and Reynolds stress model area semi-empirical model based on modeling of the equations of transport that contain the dissipation rate (ε) as well as turbulent kinetic energy (k). The derivation of turbulent kinetic energy and its rate of dissipation derived from the Navier–Stokes equation. In this work, the simulation outcomes of the proposed k-ε turbulence model indicated a good compatibility with published correlations. In order to get an accurate solution, the value of 10–8 for the maximal normalized equation residual was considered to be the convergence 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 utilized for academic purposes since it is widely used for many physical and engineering applications.

中文翻译：

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由于入口和出口位置不同而产生混合物的数值研究

数值模拟是研究可压缩流体通过不同通道的流动特性的一种方法。使用空气作为工作物质的两种方法被用来研究流动特性。在第一种方法中，依靠沿x方向水平的两个入口和一个出口来产生不同的流动特性。沿通道内的对角线计算流动特性。在第二种方法中，采用了一个水平方向的进口和出口，通道面积突然变化。在这项研究中，沿通道内部的中心线计算了流动特性，并对流场进行了研究。非线性k - Є采用模型通过使用有限差分法用曲线坐标系统中的死区和近解决流动特性ķ - Є基于运输的包含耗散速率方程的建模和雷诺应力模型区域半经验模型（ε）以及湍动能（k）。湍动能及其耗散率的推导是根据Navier–Stokes方程得出的。在这项工作中，拟议的k - ε的仿真结果湍流模型表明与已发表的相关性具有良好的兼容性。为了获得准确的解，最大归一化方程残差的10–8的值被视为计算和稳定解之间的收敛。该模型适用于流速为30 m / s的情况，所得结果以曲线，表面和轮廓的形式表示了湍流动能的速度，湍动能的耗散率和涡旋。构建器模型可广泛用于许多物理和工程应用，因此可用于学术目的。