Study on Paper Drying Rate Based on Lattice Boltzmann Method

Abstract

The lattice Boltzmann method and the law of conservation of kinetic energy were used to simulate and analyze moisture transfer during the drying process. The effects of paper porosity, paper basis weight, drying temperature and hot air velocity on the drying characteristic curve were investigated. The results show that porosity has a strong influence on the drying characteristic curve in the constant drying stage but less of an influence in the falling rate drying stage. Different paper basis weights have a significant effect on drying characteristics. The greater the weight is, the longer the drying time is. Increasing the drying temperature and hot air velocity could shorten the drying time, but the effect became weaker as these parameters were increased. These results indicated that the drying efficiency cannot be significantly improved by increasing the temperature and flow rate.