According to the theory and method of particle flow code in two dimensions (PFC2D), the block caving law of natural caving mining method was investigated.

以自然崩落采矿法为研究对象，利用二维颗粒流数值模拟(PFC2D)的原理和方法，研究了自然崩落法矿体崩落规律。

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The air-liquid two-phase flow of the seed precipitation process in two air-agitated tanks with different structures was numerical simulated in three dimensions.

以两种不同结构的空气搅拌式种分槽为研究对象，完成了晶种分解过程气—液两相流动的三维数值模拟。

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The paper researches intensively the flood model of two dimensions not steadying flow being used on the design flood of power plant in plain taking Guohua Dingqu power plant of Hebei for example.

以河北国华定曲发电厂为例，深入研究了二维不稳定流洪水模型在平原电厂设计洪水中的应用。

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