摘要
采用格子玻尔兹曼方法的单组份伪势模型与有限差分耦合的混合热格子玻尔兹曼模型,对在横向交变质量力作用下的单汽泡核态沸腾过程进行了研究,探讨了在不同接触角和过热度下,横向交变质量力的振幅和交变频率对汽泡脱离底壁的脱离特性的影响。结果表明,施加横向交变质量力会造成汽泡脱离直径减小,同时加速汽泡脱离底壁。其次,壁面越疏水,汽泡的脱离行为受到横向交变质量力的影响越大;壁面过热度越大,汽泡的脱离行为受到横向质量力的影响也越大。另外,在模拟工况下,当横向交变质量力的振幅大于0.01时,添加横向交变质量力会使汽泡的脱离直径与脱离周期均减小;而横向交变质量力的交变频率仅在某一频段时,使得汽泡的脱离周期减小。
The hybrid thermal lattice Boltzmann method coupling single component pseudopotential model of lattice Boltzmann method with finite difference was used to investigate the nucleate boiling process of single bubble under the action of transverse alternating mass force.The effect of amplitude and alternating frequency of transverse alternating mass force on the detachment characteristics of single bubble from the bottom wall was investigated at different contact angles and superheat degrees.Results show that the addition of transverse alternating mass force can result in the reduction of bubble detachment diameter and accelerate the bubble detachment from the bottom wall simultaneously.Secondly,the transverse alternating body force has greater effect on the detachment behavior of bubble on the hydrophobic wall. The transverse alternating body force has greater effect on the detachment behavior of bubble on the wall with greater superheat. In addition, when the amplitude of transverse alternating mass force is greater than 0.01, the addition of transverse alternating mass force decreases the detachment diameter and period of bubble, while its alternating frequency only decreases the detachment period of bubble in a certain frequency range.
作者
陈启明
杨帆
龚旺
CHEN Qiming;YANG Fan;GONG Wang(School of Energy and Power Engineering/Shanghai Key Laboratory of Multiphase Flow and Heat Transfer in Power Engineering,University of Shanghai for Science and Technology,Shanghai 200093,China)
出处
《能源研究与信息》
CAS
2024年第2期94-103,共10页
Energy Research and Information
关键词
核态沸腾
交变质量力
格子玻尔兹曼方法
伪势模型
nucleate boiling
alternating mass force
lattice Boltzmann method
pseudo-potential model
