A three-phase model capable of predicting the heat transfer and moisture migration for soil freezing process was developed based on the Shen-Chen model and the mechanisms of heat and mass transfer in unsaturated soil freezing. The pre-melted film was taken into consideration. and the relationship between film thickness and soil temperature was used to calculate the liquid water fracti... https://www.freaknleather.com/product-category/tig-torch-accessory-kit/