Analysis and Solution of Whisker Formation from Vapour

The process of Sublimation and formation of the solid phase from a vapour bypasses the intermediate liquid phase, can be used to purify substances or to create new forms of the solid without crystallization from a solution. There are many commercial applications including those in the consumer industry where sublimation and freeze-drying are applied. In this paper, a model for sublimation using cylindrical coordinate geometries is assumed and solved by similarity variables using an integral method. The eigenvalues of the solution indicate the rate of transformation. A closed-form solution is obtained and applied to various boundary conditions. The singularity at the origin for cylindrical solutions is discussed.