Flow and migration of nanoparticle in a single channel
Flow and migration of nanoparticle in a single channel
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DOI：
10.1007/s00231-009-0479-8
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发表时间：
2009-02
影响因子：
2.2
通讯作者：
D. Wen;L. Zhang;Yurong He
中科院分区：
文献类型：
--
作者：
D. Wen;L. Zhang;Yurong He
这项工作研究了基于欧拉和拉格朗日组合方法的数值模拟，以模拟纳米颗粒在单通道中的流动和迁移。离散纳米粒子的运动由基于牛顿第二定律的拉格朗日轨迹法确定，包括体力、各种流体动力、布朗运动和热泳力的影响。通过修改连续方程的源项，实现离散颗粒与连续流的耦合。结果揭示了纳米颗粒悬浮液的两相流性质及其对纳米流体对流传热的影响。
A numerical simulation based on a combined Euler and Lagrange method is investigated in this work to simulate the flow and migration of nanoparticles in a single channel. The motion of discrete nanoparticles is determined by the Lagrangian trajectory method based on the Newton’s second law that includes the influence of the body force, various hydrodynamic forces, the Brownian motion and the thermophoresis force. The coupling of discrete particles with continuous flow is realized through the modification of the source term of the continuous equation. The results reveal the two-phase flow nature of nanoparticle suspensions and their implications to the convective heat transfer of nanofluids.