Numerical investigation on bubble dynamics during pool nucleate boiling in presence of a non-uniform electric field by LBM

被引：40
作者：
Feng, Yuan [1 ]
Li, Huixiong [1 ]
Guo, Kaikai [1 ]
Lei, Xianliang [1 ]
Zhao, Jianfu [2 ,3 ]
机构：
[1] Xi An Jiao Tong Univ, State Key Lab Multiphase Flow Power Engn, Xian 710049, Peoples R China
[2] Chinese Acad Sci, Inst Mech, CAS Key Lab Micrograv, Beijing 100190, Peoples R China
[3] Univ Chinese Acad Sci, Sch Engn Sci, Beijing 100049, Peoples R China
来源：
APPLIED THERMAL ENGINEERING | 2019年 / 155卷
基金：
中国国家自然科学基金;
关键词：
Lattice Boltzmann method; Electrohydrodynamics; Bubble departure diameter; Bubble release frequency; LATTICE BOLTZMANN MODEL; HEAT-TRANSFER; SIMULATION; GROWTH; DEPARTURE; SURFACE; PHASES; FLOWS; FLUX; WALL;
D O I：
10.1016/j.applthermaleng.2019.04.110
中图分类号：
O414.1 [热力学];
学科分类号：
摘要：
Previous experimental studies proved that an external electric field could accelerate the detachment of vapor bubble. However, it was difficult to investigate the influencing mechanism of an electric field on bubble dynamics because of the limit of experimental technical methods. To solve this problem, a two-dimensional lattice Boltzmann model was developed in this paper to simulate the pool boiling in presence of an external electric field by coupling the pseudopotential model with phase-change model and electric field model. The growth and detachment of a single bubble on a horizontal wall during pool nucleate boiling with a non-uniform electric field was simulated. The influence of gravitational acceleration and electric field intensity on bubble dynamics was investigated in detail, and the influencing mechanism of an external electric field on bubble dynamics during pool nucleate boiling was analyzed. The numerical results showed that increasing electric filed intensity could decrease both bubble departure diameter and bubble release period. Decreasing gravitational acceleration could strengthen the influence of electric field intensity on bubble departure diameter and bubble release frequency. In other words, the non-uniform electric field established at present study could effectively reduce the possibility of heat transfer deterioration under microgravity.
引用
收藏
页码：637 / 649
页数：13
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