Numerical simulation of bubble growth and departure during flow boiling period by lattice Boltzmann method

作者：Sun, Tao; Li, Weizhong^*; Yang, Shuai

来源：International Journal of Heat and Fluid Flow, 2013, 44: 120-129.

DOI：10.1016/j.ijheatfluidflow.2013.05.003

• Lattice Boltzmann method
• Flow boiling
• Phase change
• Bubble departure diameter
• Bubble release frequency

Nucleate boiling flows on a horizontal plate are studied in this paper by a hybrid lattice Boltzmann method, where both quiescent and slowly flowing ambient are concerned. The process of a single bubble growth on and departure from the superheated wall is simulated. The simulation result supports the transient micro-convection model. The bubble departure diameter and the release frequency are investigated from the simulation result. It is found that the bubble departure diameter and the release frequency are proportional to g(-0.425) and g(0.678) in quiescent fluid, respectively, where g is the gravitational acceleration. Nucleate boiling in slowly flowing ambient is also calculated in consideration of forced convection. It is presented that the bubble departure diameter and the release frequency have exponential relationship and linear relationship with inlet velocity in slowly flowing fluid, respectively.

• 出版日期2013-12
• 单位大连理工大学