Solução analítica e numérica do modelo de difusão aplicado à secagem de bananas.

Abstract

In this work, is presented the diffusion equation analytical solution and the development of the numerical solution based on the finite difference explicit method. The diffusional model for infinite cilinder was used for representing drying kinetics of bananas, considering constant diffusion coefficient and equilibrium boundary condition on the fruit surface. The method precision is analysed by comparing both solutions. Results show that the method is adequate to this type of problem, considering a grid with 40 subdivisions on the radius and time step of 0,001 hour.