海气界面动量、热量及水汽交换系数的数值模拟

Numerical simulation of momentum heat and moisture transfer on air-sea interface

本文采用有效波加表面粗糙度的风浪模型 Rodi( 1980 )的浮力修正 k-ε模式数值模拟了不同风速、大气稳定度及风浪发展状态下的海面大气湍流边界层。计算了不同海气状况下的速度、温度、湿度湍流流场。得出阻力系数 CD 、Stanton数 CH 、Dalton数 CE随风速 U10 和大气稳定度的变化规律 ,也讨论了它们与波龄的依赖关系。与理论及实测数据进行比较 。

Velocity, temperature and moisture of air turbulence in air-sea boundary layer with variation of windspeed, atmosphere stratification and wind-wave development are numerical simulated. Rodi(1980)′s modified k-ε turbulence model is adopted and the effect of wind waves is considered by a model of significant wave with surface roughness. Variation of drag coefficient C D, Stanton number C H and Dalton number C E with windspeed U 10 , atmosphere stratification and wave age is discussed. All these numerical results agree well with the theoretical predication and observation in the open sea.