中文摘要：

本文提出了直接热源算法（Directheat source）使得颗粒壁面温度满足Dirichlet边界条件，同时采用Wang等提出的内嵌边界方法（Immersed boundary method）和多重直接力算法（Multi—direct forcing）全尺度模拟二维颗粒的运动。本文计算了运动的冷颗粒在不同Grashof数时的运动状态。本文的计算结果与其他学者的计算结果符合得很好，从而验证了本文采用的方法的精确性与有效性。

英文摘要：

In present paper, the immersed boundary method which has been apphed tor the simulation of particulate flow is extended to the simulation of multiphase flow with heat transfer. A direct heat source scheme is proposed for the satisfaction of the temperature Dirichlet boundary condition at the immersed boundary. And the multi-direct forcing scheme proposed by Wang et al[4] is applied for the simulation of two dimensional particulate flows with full scale resolution. The case of a cold particle settling in a hot fluid is conducted to verify the accuracy of the algorithm proposed in this paper. Good agreement between present results and previous results validates the accuracy and efficiency of present direct heat source scheme.