Characteristics-Based Finite-Volume Solution for Natural Convection Around a Horizontal Cylinder

Razavi, Seyed Esmail; Barar, Farzad; Farhangmehr, Vahid

doi:10.3923/jas.2008.1905.1911

J. of Applied Sciences

2008

DOI: 10.3923/jas.2008.1905.1911

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Characteristics-Based Finite-Volume Solution for Natural Convection Around a Horizontal Cylinder

Seyed Esmail Razavi¹,

Farzad Barar²,

Vahid Farhangmehr³

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Cited by 4 publications

References 15 publications

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A comparative investigation of hydrofoil at angles of attack

Razavi

Orang

2011

Numerical Methods in Fluids

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SUMMARYIn this paper, a numerical investigation of incompressible flow around a hydrofoil is presented. The laminar flow was modeled at different angles of attack. Momentum and continuity equations were coupled by the artificial compressibility scheme. In finite-volume method, convective fluxes were calculated and compared by four schemes. Flux averaging with pressure correction was used. The other characteristic-based (CB) methods consisted of Roe scheme and original CB scheme. A revised CB scheme was implemented in this research, which demonstrated very accurate solutions with respect to others. The results confirmed the superiority of the revised upwind scheme regarding accuracy and convergence without any requirement to artificial viscosity. The problem was studied at high Reynolds numbers at the onset of turbulence. For time discretization, the fifth-order Runge-Kutta scheme was used. Results were compared with those of others in which good agreement was observed. Numerical experiments were performed on the NACA0012 hydrofoil.

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A comparative investigation of hydrofoil at angles of attack

Razavi

Orang

2011

Numerical Methods in Fluids

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Incompressible Roe‐like scheme for turbulent flows

Orang

Razavi

2012

Numerical Methods in Fluids

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SUMMARYIn the current study, numerical investigation of incompressible turbulent flow is presented. By the artificial compressibility method, momentum and continuity equations are coupled. Considering Reynolds averaged Navier–Stokes equations, the Spalart–Allmaras turbulence model, which has accurate results in two‐dimensional problems, is used to calculate Reynolds stresses. For convective fluxes a Roe‐like scheme is proposed for the steady Reynolds averaged Navier–Stokes equations. Also, Jameson averaging method was implemented. In comparison, the proposed characteristics‐based upwind incompressible turbulent Roe‐like scheme, demonstrated very accurate results, high stability, and fast convergence. The fifth‐order Runge–Kutta scheme is used for time discretization. The local time stepping and implicit residual smoothing were applied as the convergence acceleration techniques. Suitable boundary conditions have been implemented considering flow behavior. The problem has been studied at high Reynolds numbers for cross flow around the horizontal circular cylinder and NACA0012 hydrofoil. Results were compared with those of others and a good agreement has been observed. Copyright © 2012 John Wiley & Sons, Ltd.

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Thermal computations of temperature distribution and bulb heat transfer in an automobile headlamp

et al. 2013

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Characteristics-Based Finite-Volume Solution for Natural Convection Around a Horizontal Cylinder

Cited by 4 publications

References 15 publications

A comparative investigation of hydrofoil at angles of attack

A comparative investigation of hydrofoil at angles of attack

Incompressible Roe‐like scheme for turbulent flows

Thermal computations of temperature distribution and bulb heat transfer in an automobile headlamp

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