摘要
采用高频电控热激发汽泡的方式构造微通道人工泡状流,可以有效抑制微通道沸腾流动的不稳定性和强化传热。本文基于Lattice Boltzmann大密度比多相流复合模型,数值研究了通道内人工泡状流的流动和传热,通过比较分析不同发泡频率的泡状流,量化分析了汽泡运动和增长对微通道流动与传热的相互影响。一方面着重分析了汽泡运动对微通道运动边界层以及汽泡相变增长对热边界层的影响,另一方面也研究了边界层对汽泡动力行为的影响,所得结论对研究抑制微通道沸腾流动不稳定性和强化传热有参考意义。
The artificial bubble flow is triggered by the Pt micro-coheater guided by periodical pulse voltage in micro-channel,which is applied to restrain instability of flow boiling and strengthen heat transfer.Based on the hybrid multi-phase lattice Boltzmann model of larger density ratio,numerical investigation on fluid flow and heat transfer of artifical bubble flow in micro-channel is presented in this article.Through comparison of different frequency bubble flows,bubble motion and growth effect on fluid flow and heat transfer is quantitively analyzed.In addition,the micro-channel boundary effect on bubble dynamic behavior is also analyzed.The investigation results have presented a significant reference on study of flow boiling instability and heat transfer in micro-channel.
出处
《计算力学学报》
EI
CAS
CSCD
北大核心
2012年第2期262-266,共5页
Chinese Journal of Computational Mechanics
基金
国家杰出青年科学基金(50825603)
国家青年科学基金(51106162)资助项目
