本文通过用焓模型求解非线性生物传热方程,研究了低温外科中冷冻探针周围组织的瞬态温度场,使生物组织的“冷冻损伤”形状、成长速率及最终稳态冷冻区域大小得以确定.本文旨在一方面为低温外科提供必要的理论依据,另一方面使一般相变导热问题的焓法求解得以进一步深入及推广. In this paper, by solving the nonlinear heat transfer equation with enthalpy model, the transient temperature field around the cryoprobe in cryogenic surgery was studied, and the shape of the “frozen injury”, the growth rate and the size of the final steady-state frozen area were determined The purpose of this paper is to provide the necessary theoretical basis for cryogenic surgery on the one hand, and to further expand and popularize the enthalpy method of general phase change heat conduction problem.