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Journal of Porous Media
Impact-faktor: 1.49 5-jähriger Impact-Faktor: 1.159 SJR: 0.43 SNIP: 0.671 CiteScore™: 1.58

ISSN Druckformat: 1091-028X
ISSN Online: 1934-0508

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Journal of Porous Media

DOI: 10.1615/JPorMedia.v16.i4.40
pages 315-334

THERMO-DIFFUSION AND DIFFUSION-THERMO EFFECTS ON FREE CONVECTION FLOW PAST A HORIZONTAL CIRCULAR CYLINDER IN A NON-DARCY POROUS MEDIUM

V. Ramachandra Prasad
Department of Mathematics, Madanapalle Institute of Technology and Science, Madanapalle, India
Vasu B
Department of Mathematics, Motilal Nehru National Institute of Technology Allahabad
O. Anwar Bég
Fluid Mechanics, Nanosystems and Propulsion, Aeronautical and Mechanical Engineering, School of Computing, Science and Engineering, Newton Building, University of Salford, Manchester M54WT, United Kingdom

ABSTRAKT

An analysis is presented for the steady free convection heat and mass transfer past a horizontal circular cylinder plate in a non-Darcy porous medium with Soret (thermo-diffusion) and Dufour (diffusion-thermo) effects included. The non-Darcy effects are simulated via a second-order Forchheimer drag force term in the momentum boundary-layer equation. A parametric study illustrating the influence of Darcy parameter Da, Forchheimer parameter Λ, Grashof number Gr, Schmidt number Sc, Soret number Sr, Dufour number Du, transpiration parameter fw, on the fluid velocity, temperature, and concentration profiles, as well as local skin friction, Nusselt, and Sherwood numbers, is conducted. Increasing Darcy number accelerates the flow due to a corresponding rise in permeability of the regime and concomitant decrease in Darcian impedance. Applications of the model arise in metallurgical materials processing, chemical engineering, flow control, etc.