Li, Q;
Luo, KH;
(2014)
Thermodynamic consistency of the pseudopotential lattice Boltzmann model for multiphase flows.
Applied Thermal Engineering
, 72
(1)
10.1016/j.applthermaleng.2014.03.030.
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Abstract
In this paper, the effects of the equation of state on the thermodynamic consistency and the interface thickness are examined in the pseudopotential lattice Boltzmann modeling of liquid–vapor flows. It is shown that, with the increase of the slope of the equation of state in the vapor-phase region (θV), the influence of the droplet size on the vapor density can be reduced. Numerically, it is found that, when the vapor-phase sound speed (View the MathML source) is of the same order of magnitude as the lattice sound speed (cs), the vapor density can be generally kept around its equilibrium value. Hence, to achieve thermodynamically consistent simulations, the vapor-phase sound speed should be comparable with the lattice sound speed. Furthermore, the interface thickness in the pseudopotential LB modeling is found to be related to the slope of the equation of state in the mechanically unstable region (θM). It is shown that |θM| should be decreased when the interface thickness needs to be widened to reduce the spurious currents.
| Type: | Article |
|---|---|
| Title: | Thermodynamic consistency of the pseudopotential lattice Boltzmann model for multiphase flows |
| Event: | The Asian Symposium on Computational Heat Transfer and Fluid Flow |
| Location: | Hong Kong, China |
| Dates: | 2013-06-03 - 2013-06-06 |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1016/j.applthermaleng.2014.03.030 |
| Publisher version: | http://dx.doi.org/10.1016/j.applthermaleng.2014.03... |
| Language: | English |
| Additional information: | This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/3.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Mechanical Engineering |
| URI: | https://discovery.ucl.ac.uk/id/eprint/1401556 |
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