a 2 d mathematical model 平面二维数学模型
The characteristics of the flow over a backward facing step are studied by use of a 3 D viscous flow mathematical model.
利用三维粘性流动数学模型，研究了台阶突扩流动的三维特性。
A 3-d dynamic mathematical model of gas explosion flow field was built based on explosion mechanics, explosion dynamic mechanics and thermodynamics.
根据爆炸力学、爆炸动力学和热力学理论，建立了瓦斯爆炸流场三维动态数学模型。
A mathematical model for the inverse problem of unsteady aerodynamic design of 2-d oscillating airfoil based on Euler equations is proposed.
建立了基于欧拉方程组的二维振荡机翼非定常气动设计反命题方法的数学模型。
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