Li, Q;
Kang, QJ;
Francois, MM;
He, YL;
Luo, KH;
(2015)
Lattice Boltzmann modeling of boiling heat transfer: The boiling curve and the effects of wettability.
International Journal of Heat and Mass Transfer
, 85
pp. 787-796.
10.1016/j.ijheatmasstransfer.2015.01.136.
Preview |
Text
Luo_1501.03857.pdf - Accepted Version Download (298kB) | Preview |
Abstract
A hybrid thermal lattice Boltzmann (LB) model is presented to simulate thermal multiphase flows with phase change based on an improved pseudopotential LB approach (Li et al., 2013). The present model does not suffer from the spurious term caused by the forcing-term effect, which was encountered in some previous thermal LB models for liquid–vapor phase change. Using the model, the liquid–vapor boiling process is simulated. The boiling curve together with the three boiling stages (nucleate boiling, transition boiling, and film boiling) is numerically reproduced in the LB community for the first time. The numerical results show that the basic features and the fundamental characteristics of boiling heat transfer are well captured, such as the severe fluctuation of transient heat flux in the transition boiling and the feature that the maximum heat transfer coefficient lies at a lower wall superheat than that of the maximum heat flux. Furthermore, the effects of the heating surface wettability on boiling heat transfer are investigated. It is found that an increase in contact angle promotes the onset of boiling but reduces the critical heat flux, and makes the boiling process enter into the film boiling regime at a lower wall superheat, which is consistent with the findings from experimental studies.
| Type: | Article |
|---|---|
| Title: | Lattice Boltzmann modeling of boiling heat transfer: The boiling curve and the effects of wettability |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1016/j.ijheatmasstransfer.2015.01.136 |
| Publisher version: | http://doi.org/10.1016/j.ijheatmasstransfer.2015.0... |
| Language: | English |
| Additional information: | Copyright © 2015 Elsevier Ltd. All rights reserved. This manuscript version is made available under a Creative Commons Attribution Non-commercial Non-derivative 4.0 International license (CC BY-NC-ND 4.0). This license allows you to share, copy, distribute and transmit the work for personal and non-commercial use providing author and publisher attribution is clearly stated. Further details about CC BY licenses are available at https://creativecommons.org/licenses/. Access may be initially restricted by the publisher. |
| Keywords: | Science & Technology, Physical Sciences, Technology, Thermodynamics, Engineering, Mechanical, Mechanics, Engineering, Lattice Boltzmann method, Pseudopotential model, Liquid-vapor phase change, Boiling heat transfer, Wettability, DIRECT NUMERICAL-SIMULATION, DENSITY RATIO, CONTACT-ANGLE, PHASE-CHANGE, FLUID-FLOWS, BUBBLE, SURFACE, LIQUID, POOL, DISSIPATION |
| 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/1494021 |
Archive Staff Only
 |
View Item |
