液体通流微小槽道内气泡动力学行为模拟_周吉第62卷第10期化工学报Vol.62No.102022年10月CIESCJournalOctober2022研究论文液体通流微小槽道内气泡动力学行为模拟周吉,朱恂,丁玉栋,王宏,廖强,谢建(重庆大学低品位能源利用技术及系统教育部重点实验室,重庆大学工程热物理研究所,重庆400044)摘要:采用VOF方法,对液体通流微小通道内壁面逸出气泡的形成、生长及脱离运动进行了数值模拟,并讨论了壁面浸润性、液体流速、气体流速对气泡动力学行为的影响。结果表明:气泡生长壁面亲水性增强有利于其从壁面脱离;气泡生长壁面气相覆盖率随壁面接触角的增大而增大;流动阻力因子随壁面接触角的增大而减小。较高的液体流速会导致气泡的脱离时间和脱离体积、壁面气相覆盖率及流动阻力因子减小;而较高的气体逸出速率(气相Reynolds数高于14时)对气泡脱离体积、壁面气相覆盖率和流动阻力因子影响不大。关键词:气泡;VOF方法;小槽道;动力特性;数值模拟DOI:10.3969/j.issn.0438-1157.2022.10.010中图分类号:TM911.4文献标志码:A文章编号:0438-1157(2022)10-2740-07Numericalsimulationofgasbubbleemergingfromporeintoliquidflowmicro-channelZHOUJi,ZHUXun,DINGYudong,WANGHong,LIAOQiang,XIEJian(KeyLaboratoryofLow-gradeEnergyUtilizationTechnologiesandSystems,InstituteofEngineeringThermophysics,ChongqingUniversity,Chongqing400044,China)Abstract:Thedynamicbehaviorofagasbubbleenteringaliquidflowmicro-channelthroughaporewithprescribedmassflowratewassimulatedbyusingcomputationalfluiddynamicsinconjunctionwithavolumeoffluid(VOF)method.Simulationsoftheprocessesofgasbubbleemergence,growth,deformationanddetachmentwereperformedtoexplicitlytracktheevolutionoftheliquid-gasinterface,andtocharacterizethedynamicsofagasbubblesubjectedtowaterflowintermsofdeparturevolume,flowresistancecoefficient,andgascoverageratio.Theeffectsofwettabilityofthewallwherethebubbleemergesfrom,waterandairmassflowrateswerediscussedwithaparticularfocusontheeffectofthewettabilityofthebottomwallwhilethestaticcontactanglesoftheotherchannelwallsweresetto90°.Thesimulatedresultsshowedthatthehydrophilicwallfacilitatedthedepartureofbubblewhilegascoverageratioincreasedanddimensionlessflowresistancecoefficientdecreasedforhydrophobicwall.Highwaterinletmassflowrateresultedinanearlierdepartureanddecreaseddeparturevolumeofthebubbleaswellaslowgascoverageratioandflowresistancecoefficient.Itwasfoundthatincreasingairmassflowrateledtoearlierdetachmentofthebubble.However,higherairmassflowrateshowedscarceinfluenceonthedynamicbehaviorofthebubbleoncetheReynoldsnumberofairwasover14.Keywords:bubble;volumeoffluidmethod;mini-channel;dynamics;numericalsimulation2022-01-10收到初稿,2022-04-28收到修改稿。联系人:朱恂。第一作者:周吉(11016—),男。基金项目:国家自然科学基金项目(50876119);重庆市自然科学基金项目(CSTC,2022BB6212);教育部新世纪优秀人才支持计划项目(NCET-07-0912)。Receiveddate:2022-01-10.Correspondingauthor:Prof.ZHUXun,zhuxun@https://www.sodocs.net/doc/b22637138.htmlFoundationitem:supportedbytheNationalNaturalScienceFoundationofChina(50876119),theNaturalScienceFoundationofChongqing(CSTC,2022BB6212)andtheProgramforNewCenturyExcellentTalentsinUniversity(NCET-07-0912).本文来源：网络收集与整理，如有侵权，请联系作者删除，谢谢！