A Comparison of the Drying Simulation Codes TRANSPORE and WOOD2D which are used for the Modelling of Two-Dimensional Wood Drying Processes

摘要

This study is devoted to investigating the heat and mass transfer phenomena that occur during the conyective drying of wood at high temperatures. A comparison will be made between an existing two-dimensional computer code known as TRANSPORE, which was developed by Perre in France, and another two-dimensional code which was developed independently by Turner in Australia. Both numerical codes use a comprehensive set of macroscopic equations to describe the drying process, and most importantly treat the anisotropic behaviour of the wood. The porous medium is defined by three state variables: temperature, moisture content and gaseous pressure and the numerical simulation codes allow the evolution of the distributions of these state variables to be analysed throughout the drying process. The numerical investigation presented in this research work will compare the results obtained from both simulation codes and comments will be made on their consistencies. The influence that the drying air characteristics (moist air and super-heated steam) have on the overall drying kinetics, together with the effect that varying the mesh structure or changing the relative permeability curves have on the results will be thoroughly scrutinised.