Novel algorithm for compressible Newtonian axisymmetric thermal flow

Anas Al-Haboobi and Alaa H. Al-Muslimawi
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Anas Al-Haboobi: Department of Mathematics, College of Sciences, University of Basrah, Basra, Iraq†Faculty of Postgraduate Studies, University of Kufa, Kufa, Iraq
Alaa H. Al-Muslimawi: Department of Mathematics, College of Sciences, University of Basrah, Basra, Iraq

International Journal of Modern Physics C (IJMPC), 2024, vol. 35, issue 03, 1-17

Abstract: In this paper, we mainly focus on the development of the Taylor-Galerkin/Pressure-Correction method (TG/PC) method to solve the flow of a compressible Newtonian fluid under nonisothermal conditions. The process of development needs applying the two-step Lax–Wendroff method on the energy equation, after which two new steps for energy equations will be obtained within the TG/PC algorithm. In addition, for the density component, the Tait equation of state is adopted to relate density to pressure, which also yields a new step within the novel method to give the correction formula of compressible pressure. To perform the analysis of the new algorithm, Poiseuille flow through axisymmetric rectangular channel for the Newtonian thermal flow is utilized as a simple problem test. The effect of nondimensional factors such as Reynolds number (Re) and Prandtl number (Pr) is discussed in this study. The influence of thermal conductivity (k) and viscosity (μ) on the solution components is presented as well. Also, comparison for both compressible and incompressible flows is provided in addition to a comparison between both cases’ convergence, as it turns out that the convergence of the incompressible case is better than the compressible case. All the results of the effects presented in this study agree well with the approved physical trend.

Keywords: Finite element method; Taylor-Galerkin/Pressure-Correction method; thermal flow; compressible flow; Newtonian flow (search for similar items in EconPapers)
Date: 2024
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DOI: 10.1142/S0129183124500256

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