一些研究人员分析了商业软件的不足，提出了新的渗流数学模型。

Some researchers analyzed the shortcomings of the multi continuum models and presented some new percolation models.

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通过编制C语言程序在CFD商业软件FLUENT中引入颗粒动力学模型，实现对颗粒成长的数学模拟。

The growth of titania nanoparticles in flames is simulated by using the commercial CFD-code FLUENT & it′s UDF.

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