物理学报2024，Vol.73Issue(2)：220-232,13.DOI:10.7498/aps.73.20231141
电场作用下锥翅表面强化池沸腾换热的介观数值方法
A mesoscopic numerical method for enhanced pool boiling heat transfer on conical surfaces under action of electric field
摘要
Abstract
The saturated pool boiling heat transfer on a conical structure surface under the action of an electric field is numerically investigated by using the lattice Boltzmann(LB)model coupled with an electric field model.A comparison study of boiling heat transfer phenomenon smooth surface and conical surface without the action of an electric field is first conducted in order to quantitatively analyze the mechanism of the electric field effect on boiling heat transfer on the conical structure surface.It is discovered that the conical structure has more active nucleation sites during the nucleate boiling regime,improving the boiling heat transfer efficiency and enhancing the critical heat flux(CHF).However,in the transition boiling stage and film boiling stage,the conical structure increases the flow resistance of the fluid on the fin surface,hindering heat transfer between the vapor and liquid and producing lower heat transfer performance than smooth surface.Based on the aforementioned findings,the boiling heat transmission on the conical structure surface is enhanced by applying an electric field.Numerical results indicate that the effect of the electric field on the boiling heat transfer performance on the conical structure surface is related to the boiling regime.In the earlier stage of the nucleation boiling regime,when an electric field is present,the onset time of bubble nucleation is slightly delayed,bubble size decreases a little,and boiling is slightly suppressed.However,the combination effect of electric field and conical structure,especially the tip effect,prevents the spread and diffusion of dry areas on the heating surface,thereby enhancing boiling heat transfer in the fully developed nucleate boiling stage.The tip effect grows more evidently in the transition boiling regime and film boiling regime,and increasing electric field intensity causes boiling to continue in the nucleate boiling regime at a higher superheat level.As a result,boiling heat transfer performance is greatly improved,and CHF steadily rises.关键词
锥翅结构/电场/格子Boltzmann方法/池沸腾Key words
conical structure/electric field/lattice Boltzmann method/pool boiling引用本文复制引用
张森,娄钦..电场作用下锥翅表面强化池沸腾换热的介观数值方法[J].物理学报,2024,73(2):220-232,13.基金项目
国家自然科学基金(批准号:51976128,52376068)和上海市浦江计划(批准号:22PJD047)资助的课题. Project supported by the National Natural Science Foundation of China(Grant Nos.51976128,52376068)and the Shanghai Pujiang Program,China(Grant No.22PJD047). （批准号:51976128,52376068）
