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Journal of Porous Media

年間 12 号発行

ISSN 印刷: 1091-028X

ISSN オンライン: 1934-0508

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UNSTEADY MIXED CONVECTION OVER AN EXPONENTIALLY STRETCHING SURFACE: INFLUENCE OF DARCY-FORCHHEIMER POROUS MEDIUM AND CROSS DIFFUSION

巻 24, 発行 2, 2021, pp. 29-47
DOI: 10.1615/JPorMedia.2020026016
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Prabhugouda Patil
KLE Technological University, BV Bhoomaraddi Campus, Vidyanagar, Hubballi-580031
Nafisabanu Kumbarwadi
Department of Mathematics, Karnatak University, Pawate Nagar, Dharwad-580 003, Karnataka, India
Ali J. Chamkha
Faculty of Engineering, Kuwait College of Science and Technology, Doha District, Kuwait; Center of Excellence in Desalination Technology, King Abdulaziz University, P.O. Box 80200, Jeddah 21589, Saudi Arabia; Mechanical Engineering Department, Prince Sultan Endowment for Energy and Environment, Prince Mohammad Bin Fahd University, Al-Khobar 31952, Saudi Arabia; RAK Research and Innovation Center, American University of Ras Al Khaimah, P.O. Box 10021, Ras Al Khaimah, United Arab Emirates

要約

This paper deals with the unsteady double-diffusive mixed convection flow over an exponentially permeable vertical stretching surface in the presence of Darcy-Forchheimer, Dufour, and Soret (cross diffusion) effects. The unsteadiness in the flow, temperature, and the species concentration fields are due to a time-dependent free stream velocity as well as an exponentially stretching surface velocity. The boundary layer equations are transformed into nondimensional form and solved numerically using an efficient, implicit finite difference scheme in combination with the quasilinearization technique for various governing physical parameters. Numerical computations are displayed graphically to illustrate the Soret, Dufour, and permeability effects on the velocity, temperature, and species concentration profiles. Numerical results for the skin friction coefficient, heat transfer, and mass transfer rates are also presented. The present results are compared with previously published work and are found to be in excellent agreement.

キーワード: unsteady mixed convection, exponentially stretching surface, nonsimilar solution, Dufour and Soret effects, Darcy-Forchheimer porous medium
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