Conjugate Effects of Heat and Mass Transfer on Natural Convection Flow Across an Isothermal Horizontal Circular Cylinder with Chemical Reaction

Natural convection flow across an isothermal cylinder immersed in a visc ous incompressible fluid in the presence of species concentration and chemic al reaction has been investigated. The governing boundary layer equations are transformed into a system of non-dimensional equations and the resulting nonlinear system of partial differential equations is reduced to a system of local non-similarity boundary layer equations, which is solved numerically by a very efficient implicit finite difference method tog ether with the Keller-box scheme. Numerical results are presented by the velocity, temperature and species concentration profiles of the fluid as well as the local skin-friction coefficient, local heat transfer rate and local species concentration transfer rate for a wide range of chemical reaction parameter ( = 0.0,0.5,1.0,2.0,4.0), buoyancy ratio parameter N (N = 1.0, 0.5,0.0,0.5,1.0), Schmidt number Sc (Sc = 0.7,10.0,50.0,100.0) and Prandtl number Pr (Pr = 0.7,7.0).