Numerical Solution of Unsteady Free Convective Flow Past a Vertical Plate with Heat and Mass Fluxes Considering Chemical Reaction and Heat Absorption

摘要

Laminar boundary layer natural convection flow with heat and mass transfer of an optically thick heat-radiating and heat-absorbing fluid along with first-order chemical reaction has been investigated numerically. The partial differential equations (PDEs) governing the flow model are non-dimensionalized and solved using finite element technique. A grid independence analysis is carried out to ensure the convergence of solutions, and the code has been validated by comparing the results obtained via utilized method with those of earlier published results. To gain a better perspective of flow field, the solution of non-dimensional velocity, temperature, and concentration of the fluid is presented in a graphical form. Fluid temperature is observed to decrease through-out the thermal boundary layer on increasing the heat absorption. Chemical reaction has an adverse effect on species concentration.