The numerical simulation of the cabin indicates : the normal k - model is adaptive to simulate the air flow ; the simplen algorithm can satisfy the requirement of calculation for its rapid convergence velocity ; the second order accurate supg in advection discretization scheme can attain more precise result 模拟结果得出如下结论：标准k -模型对系统流动模拟是适合的； simplen算法收敛更快，满足运算的需要；采用二阶supg的对流项分离方案可以获得更高的计算精度。
First conceptual models , 3d surface computer modelling , product technical development , injection moulds , mould flow simulations , rapid prototyping , first units to be tested in fairs , post analysis and last improvements , etc , are all just part of our daily routine and represent the steps to be taken to have the product ready on the market , as soon as possible , and with success guaranteed 概念模型、 3d电脑模型、产品技术开发、注塑模具、流动模拟、快速成型、后分析、最后的改进等等，都是我们常规工作的部分，是将产品投放到市场之前和保证产品获得市场成功的必要步骤。
