Develops the two dimensional mathematical models for direct-buried pipes and in-duct pipes and solves them using the boundary discretization method.

建立了供热管网直埋、地沟敷设管道的二维数学模型，通过边界离散方法进行了求解。

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By introducing the concept of "nihility point" and the method of "spherule bounding" in the algorithm, we have simply and effectively realized boundary discretization in 3-d space.

这种算法采用“虚点”概念，按照一定的规则用“小球跳跃法”简单而有效地实现了三维场域边界的三角形离散。

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The finite volume discretization method and treatment of boundary condition were presented.

采用有限容积法离散方程，附加源项法处理边界条件。

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