针对SIMPLE系列算法,通过分别求解控制容积界面和节点两个位置的对流-扩散方程来提高数值计算精度,提出了一种流动与传热数值模拟的新方法。采用新的数值方法对顶盖驱动流与正方腔自然对流进行了数值模拟。数值模拟结果表明,在相同网格划分时,新的数值方法相对迎风格式、乘方格式、QUICK格式SIMLE算法的计算精度高;而在计算精度基本相同时,新方法有较高的计算效率。 Aiming at the SIMPLE algorithm, a new method of numerical simulation of flow and heat transfer is proposed, which solves the convection - diffusion equation of two positions of volume interface and node respectively to improve numerical accuracy. A new numerical method was used to simulate the natural convection of the cap-driven flow and the square cavity. The numerical simulation results show that the new numerical method is more accurate than the upwind, power and QUICK SIMLE algorithms for the same mesh, while the new method has higher computational efficiency when the computational accuracy is basically the same.