Dr Perelman proved Poincaré's conjecture by taking an equation normally used to model heat dissipation in three-dimensional objects, known as Ricci flow.
佩雷尔曼博士利用广为人知的“瑞奇流（Ricci flow）”这样一个热方程来证明了庞加莱猜想。
2
The mixing temperature of the flow is gained from the heat balance equation.
通过建立热平衡方程，求出流体混合温度。
3
The mass conservation equation, energy conservation equation, flowequation and heat transfer equation are described in this paper.