Multidimensional Characteristic Modeling of Combined Convection Flows

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Rostamzadeh Khosroshahi Alireza; esmaeel Razavi Seied; MIRSAJEDI SEYED MEHDI

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Journal: Modares Mechanical Engineering Year:2018 | Volume:18 | Issue:6 Page(s): 1-11

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Title

Multidimensional Characteristic Modeling of Combined Convection Flows

Author(s)

Rostamzadeh Khosroshahi Alireza | esmaeel Razavi Seied | MIRSAJEDI SEYED MEHDI | Issue Writer Certificate

Keywords

Multidimensional characteristicQ2

Artificial compressibilityQ2

Navier-Stokes equationsQ1

Combined ConvectionQ2

Abstract

Present study proposes a new multidimensional artificially characteristic-based (MACB) scheme for simulation of Combined Convection flows. Multidimensional characteristic structure for energy propagation in incompressible flow is derived for the first time. Four pseudo-waves are selected and equations are discretized along them to observe the physical behavior of domain. Viscous fluxes are computed by variables derivatives at the cell interfaces and for time discretization, a 4th-order Runge-Kutta method was used. According to the new scheme, two-dimensional flow with heat transfer in a square cavity and forced convection around a circular cylinder are solved for a wide range of Reynolds and Grashof numbers. Also, for comparison purposes, the CB scheme with averaging for energy equation is used. It was found that MACB has remarkable faster convergence in comparison with CB scheme and averaging methods. Also, by using MACB scheme, maximum permissible CFL number can be increased 80 percent in comparison to CB scheme. At higher Richardson numbers, the conventional flux averaging was failed to converge properly while MACB scheme presents the most rapid convergence. The computed results of MACB scheme are in good agreement with the benchmark solutions.

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APA: Copy

Rostamzadeh Khosroshahi, Alireza, esmaeel Razavi, Seied, & MIRSAJEDI, SEYED MEHDI. (2018). Multidimensional Characteristic Modeling of Combined Convection Flows. MODARES MECHANICAL ENGINEERING, 18(6 ), 1-11. SID. https://sid.ir/paper/178104/en

Vancouver: Copy

Rostamzadeh Khosroshahi Alireza, esmaeel Razavi Seied, MIRSAJEDI SEYED MEHDI. Multidimensional Characteristic Modeling of Combined Convection Flows. MODARES MECHANICAL ENGINEERING[Internet]. 2018;18(6 ):1-11. Available from: https://sid.ir/paper/178104/en

IEEE: Copy

Alireza Rostamzadeh Khosroshahi, Seied esmaeel Razavi, and SEYED MEHDI MIRSAJEDI, “Multidimensional Characteristic Modeling of Combined Convection Flows,” MODARES MECHANICAL ENGINEERING, vol. 18, no. 6 , pp. 1–11, 2018, [Online]. Available: https://sid.ir/paper/178104/en

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