深圳海岸复杂地形气流与湍流特征的数值模拟

利用三维非静力能量闭合（Ｅ－ε）的边界层模式，以深圳海岸复杂地形进行了实际模拟。结果给出了该地区海陆风情形下气流和湍流孤变化特征。在海风发展盛期，气流方向由大面积的水域和内陆的位置决定，不规则海岸线对局地气流影响不大，夜间陆风时，不规则海岸线对局地气流影响较大，湍流能量高值颁在陆地上空的不稳定层内，水面上湍能很小。模拟结果与实测结果上比较吻合。

THE SIMULATION ON CHARACTERISTIC OF AIRFLOW AND TURBULENCE OVER COASTAL COMPLEX TERRAIN IN SHENZHEN REGIONS

A three-dimension nonhydrostatic PBL model using energy closure scheme,which canprovide the initial input data of transport and diffusion model,was used to simulate the time-dependent variation of the air flow and turbulence over coastal complex terrain in Shenzhenregions. Mainly due to very irregular coasts and complex mountain,hydrostatic assumptionwhich has been used mostly in field of meteorology was abandoned. To give some turbulencedata to diffusion model,simple energy closure scheme,which comprised turbulence predictionequation and its dissipation rate equation,was used. Time -dependent variation characteris-tics of air flow and tubulence were well simulated in the above-mentioned regions. Resultsobtained from PBL model agree with those from observation.