谈谈稻麦亩产量的计算方法 子粘性应力张量和平均速度梯度场之间的关联，提出一个各向同性化 的涡粘性系数（ m ε 或 t ν ）和涡粘性模型（EVM，eddy-visc osity-model）的概念。 2． 1925 年，普朗特（L. Prandlt）提出混合长度假设（MLH ，mixed
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采用两层涡粘性模型和速度剖面的指数律导出机械能方程的耗散积分解析表示式。
An analytical expression of dissipation integral for kinetic energy integral equation is derived by two-layer eddy viscosity turbulence model and the power law of the velocity profile.
计算中采用了半正交曲线坐标系和涡粘性各向异性湍流模型。
The curvilinear semiorthogonal coordinate system and a turbulence model considering the anisotropy of eddy-viscosity are used.
计算结果表明，采用本文改进的涡粘性模型和涡粘性分布的平滑办法，对文中所计算的几种情况，都给出了满意的结果。
For several situation presented in this paper satisfactory results are obtained using an improved eddy viscosity model and a smooth method of the eddy viscosity distribution.
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