Resumo

AHMED, S  e  KALITA, K. Mathematical modeling for porous media transport in newtonian radiating/chemically reacting fluid over an impulsively-started vertical plate: A finite difference approach. Lat. Am. appl. res. [online]. 2014, vol.44, n.1, pp. 71-80. ISSN 1851-8796.

Theoretical investigation is presented here for the model of unsteady MHD thermal convection flow of a viscous incompressible absorbing-emitting optically thin gray gas along an impulsively-started semi-infinite vertical plate adjacent to the Darcian porous regime in the presence of a first order chemical reaction and significant thermal radiation effects. The conservation equations are nondimensionalized and are solved by an accurate and unconditionally stable implicit finite difference scheme of Crank-Nicholson type. The flow is found to be accelerated with increasing porosity parameter (K), whereas the temperature and concentration distributions are reduced in the Darcian regime. Flow velocity and Temperature are found to be depressed with progression of thermal radiation (R_a) contribution, but enhanced the concentration distribution. Applications of the model arise in solar energy collector analysis, magneto-fluid dynamics and industrial materials processing

Palavras-chave : Optically Thick Gray Gas; Magneto-Fluid Dynamics; Thermal Radiation; Solar Energy Collectors; Crank-Nicolson Scheme; Darcian Regime; Chemically Reacting Fluid.