APPROXIMATE CLOSED-FORM ANALYTICAL SOLUTION OF THE DESUBLIMATION PROBLEM IN A POROUS-MEDIUM

An approximate analytical method for solving a desublimation problem i s presented. The method is based on the criterion that the total error over the domain of interest which results from introducing an approxi mate solution into the governing equation of a boundary-value problem must be kept to a minimum. The results thus obtained are compared with the corresponding exact solution and are in good agreement. The metho d has now been applied to a problem where the Luikov number is a linea r function of moisture concentration. The effect of variability of Lui kov number with nondimensional moisture concentration, nondimensional frozen-moisture concentration as well as the location of the moving de sublimation front are shown graphically.