三维热扩散预测模型

A Three-Dimensional Prediction Method for Thermal Diffusion

根据Ｋｏｌｍｏｇｏｒｏｖ和Ｐｒａｎｄｔｌ的假设，将均匀流体的湍粘性与局部能量联系起来，引入计算网格无法分辨的次网格能量，计算出质量、热量和动量的水平、垂直交换系数，建立了三维湍能封闭模型。将此模型用于热污染预测技术研究中，通过数值方法计算出瞬时潮流场，进而预测温排水引起海水升温程度与范围。

Based on the hypothesis of Kolmogorov and Prandtl, by linking the coefficient of eddy viscosity of homogeneous fluid with the local energy, the horizontal and vertical exchange coefficients of mass, heat and momentum are computed with the introduction of the subgridscale turbulence energy and a threedimensional turbulent closure model is developed and this model is applied to the prediction of thermal pollution. An instantaneous tidal current field is given by using the numerical method, the distribution of temperature rise is predicted and the effect of wind on thermal discharge is discussed.