Open AccessTHERMAL AND MASS DIFFUSIVE STUDIES ON A MOVING CYLINDER ENTRENCHED IN A POROUS MEDIUM
Author(s) -
P. Loganathan,
M. Dhivya
Publication year - 2018
Publication title -
latin american applied research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.123
H-Index - 23
eISSN - 1851-8796
pISSN - 0327-0793
DOI - 10.52292/j.laar.2018.269
Subject(s) - nusselt number , laminar flow , mechanics , cylinder , sherwood number , boundary layer , materials science , compressibility , heat transfer , porous medium , mass transfer , thermodynamics , mathematics , reynolds number , physics , geometry , porosity , turbulence , composite material
A numerical investigation is accomplished for an unsteady laminar free convective flow of a viscous incompressible fluid over an impulsively started semi-infinite vertical cylinder embedded in a porous medium. The level of temperature and concentration at the surface area of the cylinder are assumed to vary as functions of power law type, in the axial coordinate. The problem is governed by a system of coupled nonlinear boundary layer equations with appropriate variable surface boundary conditions and the numerical results are obtained using an implicit finite difference scheme of Crank-Nicholson type. The effects of physical parameters on velocity, temperature and concentration profiles and also on local and mean skin-friction coefficient, Nusselt number and Sherwood number are interpreted graphically. It is observed that the variable temperature and concentration exists in the boundary of cylinder relegates the rate of heat and mass transfer.