Similarity analysis on heat and mass transfer of absorption process for the falling film flow on a porous medium.

Heat and mass transfer of absorption process for the falling film flow on a porous medium is modeled by Darcy-Brinkman equations and solved by using similarity solution technique. The governing coupled nonlinear partial differential equations are transformed into coupled nonlinear ordinary differential equations by using a similarity transformation and solved analytically and numerically by using shooting technique in MATLAB. Boundary layer velocity, temperature and concentration profiles are determined numerically and graphically for various values of Darcy number, dimensionless film thickness, Prandlt number, Schmidt number and other driving parameters. Moreover, the physical parameter such as local Nusselt number and local Sherwood number are presented both analytically and graphically.