微通道内两相流动的耗散粒子动力学模拟

DISSIPATIVE PARTICLE DYNAMICS SIMULATION OF TWO PHASE FLOW IN THE MICROCHANNEL

使用了一种两相的耗散粒子动力学模型来模拟微通道内两相流动相变过程,采用改进了的Verlet速度算法,得到了微通道内流体的速度分布图.DPD粒子流动过程中,粒子出现团聚和稀化的现象,表明流体开始出现汽化.计算结果表明,耗散粒子动力学(DPD)方法可以用于对微通道里的相变过程进行模拟.

A two-phase model for dissipative particle dynamics was used to simulate the flow boiling in microchannel on the basis of a corrected Verlet method. The velocity distribution diagrams were obtained for two phase flow in the microchannel. During the flowing process of DPD particle, the phenomenon of reunion and thinning appears, which indicates that the fluid began to vaporize.The computational results showed that dissipative particle dynamics can be used to simulate the flow process with phase change in microchannels.