基于Lattice-Boltzmann方法的纳米流体流动与传热分析

FLOW AND HEAT TRANSFER SIMULATION OF NANOFLUIDS WITH LATTICE-BOLTZMANN METHOD

纳米流体是由流体与纳米粒子组成的悬浮体。由于悬浮的纳米粒子会受到各种内力或外力的影响,这使得其运动规律和换热规律及其复杂。本文运用Lattice-Boltzmann(LB)方法建立纳米流体的传热模型,并对纳米流体和水的流动换热参数进行比较分析。

The Lattice Boltzmaim method is used to analyze the dynamic of nanofluid, in which nanoparticles are suspended. Some types of internal and external forces acting on nanoparticles are taken into account. All these forces make the thermal and dynamic mechanism inside the nanofluid very complicated. The LB flow and thermal models are established for simulation of nanoparticles behavior in the fluid system. Also, the convective heat transfer coefficient of the nanofluid is computed and compared with that for pure water under the same Reynolds number.