Prediction of Coupled Heat and Water Transfer in Soil Under Relatively High Temperature Condition Using Generalized Finite Element Method Software COMSOL.

Using hot water (253-368K) for soil sterilization has been popular in Japan as an alternative for using methylbromide having negative effect on environment. One of challenges using hot water is to decide how much amount of hot water be appropriate. Computer simulation is one of the methods that can easily determine appropriate amount of hot water. However, there is few soil heat and water transfer prediction model under such a high temperature condition. Thus we extended a coupled soil heat and water transfer model for a high temperature condition and tested the model compared with measurement results of heat and solute movement during and after hot water application in a field. Result will be discussed.