相界面变形、运动、相变与界面运输机理边界元数值模拟

The boundary element methods for numerically simulating multiple phase change moving boundary, nonlinear variational thermophysical properties, non-Fourier heat conduction and unsteady free surface problems are developeted. Bridgman crystal growth process in microgravity environment, two-phase flow and phase-change heat transfer in the evaporator of microgravity capillary pump loop (CPL), the distortion and trajectory variation of discrete bubbles in multiphase pump and mutiple phase-change problems in the materials of heat storage are numerically simulated with the boundary element methods. The transport mechanism of the momentum, work and heat on distortion and phase change interface, the special process and law on the interface under the transnormal conditions of microgravity and rapid heat transfer are revealed. It has important scientific meaning for developting boundary element method, perfecting and developting the numerical methods and theoretics of multiphase flow and themophysics.

建立与发展数值模拟非定常自由面与相变运动界面问题的边界元方法。数值模拟一些典型的力学与热物理环境下相界面变形、相变与运动过程，揭示相界面上动量、功与热输运机理，及其在微重力、超急速传热超常条件下的特殊过程与特殊规律。对发展多相流热物理数值方法，建立与完善多相流热物理新理论体系具有重要的科学意义，并有一定的工程应用前景。..