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Multipseudopotential interaction models for thermal lattice Boltzmann method simulations.
Physical Review E ( IF 2.2 ) Pub Date : 2020-07-28 , DOI: 10.1103/physreve.102.013311
Kamil Pasieczynski 1 , Baixin Chen 1
Affiliation  

In this work, in the first instance, the multipseudopotential interaction (MPI) model's capabilities are extended for hydrodynamic simulations. This is achieved by combining MPI with the multiple-relaxation-time collision operator and with surface tension modification methods. A method of approaching thermodynamic consistency is also proposed, which consists of splitting the ɛj term into separate terms. One of these terms is used in the calculation of the interparticle force, and the second one is used in the forcing scheme. Secondly, MPI is combined with thermal models in order to simulate droplet evaporation and bubble nucleation in pool boiling. Thermal coupling is implemented using a double distribution function thermal model and a hybrid thermal model. It is found that MPI thermal models obey the D2-law closely for droplet evaporation. MPI is also found to correctly simulate bubble nucleation and departure from the heating element during nucleate pool boiling. It can be suggested that MPI thermal models are comparatively better suited to thermal simulations at low reduced temperatures than single pseudopotential interaction models, although such cases remain very challenging. Droplet evaporation simulations are carried out at a reduced temperature (Tr) of 0.6 by setting the parameters in the Peng-Robinson equation of state to a=1/6272 and b=1/168.

中文翻译:

用于热晶格玻尔兹曼方法模拟的多重伪势相互作用模型。

在这项工作中,首先,将多潜势相互作用(MPI)模型的功能扩展到流体动力学模拟中。这是通过将MPI与多重松弛时间碰撞算子以及表面张力修改方法结合起来实现的。还提出了一种接近热力学一致性的方法,该方法包括分解ɛĴ术语分为单独的术语。这些术语之一用于计算粒子间力,第二项用于强制方案。其次,MPI与热模型相结合,以模拟池沸腾中的液滴蒸发和气泡成核。使用双分布函数热模型和混合热模型实现热耦合。发现MPI热模型服从d2-紧密地进行液滴蒸发。还发现MPI可以正确模拟气泡成核以及在成核池沸腾过程中从加热元件脱离。可以认为,MPI热模型比单一的伪电势相互作用模型更适合在低温下进行热模拟,尽管这种情况仍然非常具有挑战性。在降低的温度下进行液滴蒸发模拟Ť[R 通过将Peng-Robinson状态方程中的参数设置为0.6 一种=1个/6272b=1个/168
更新日期:2020-07-28
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