Simulation of Wood Drying Process with a Sensitivity Analysis
摘要
Nowadays, wood drying at an industrial level is a process of enormous importance as well as the need to have computational tools that offer a prediction of the results of this process. This paper deals with the numerical simulation of the wood drying process for pine, analyzing the conditions that lead to a more uniform drying in a slab of this type of wood. The partial differential equations system proposed by Luikov (Heat and mass transfer in capillary-porous bodies. Pergamon Press, Oxford, 1966) for heat and mass transfer that govern the drying process, was simulated with finite element method using the commercial solver, COMSOL Multiphysics. Profiles of moisture potential and temperature were obtained and analyzed at different drying times and positions on the sample. A sensitivity study of moisture uniformity was carried out over the driving parameters for moisture and heat fluxes. The convective moisture transfer coefficient resulted the most influent parameter over the drying uniformity for the pine wood sample, although for values starting from 8 × 10−6 kg/m2 s, it is not possible to increase the uniformity in the drying for the studied wood.