摘要
Thecharacteristicsofavaporbubblewithinthethermalboundarylayerweretheoreticallyanalyzed.ThePhysicalmodelsaccountingforthevariationofinterfacialtensionandfluiddensitywithtemperaturewerepropsedtoinvestigatebubbleinterfaceaspectsandthefluidflowaroundthebubble.Theanalysesdemonstratedthatthevariationininterfacialtensionresultsinveriationsintheliquid-vaporinterfaceshpaeandbubbledynamics,whichmayplayssignificantroleinthedepartureprocessofavaporbubblefromaheatedwallsurface,Increasingtemperaturegradientsintheboundarylayerandthegravitationalfieldinduceacontactlinecontractionandcorrespondinglypromotesbubbledeparture.Thesimulationofliquidflowaroundthebubbleshowsthatnaturalconvectiondominatestheflowforearthconditions;however,thethermocapillaryforcesprovidetheprincipalcatalystforbubbledepartureinamicrogravityenvironment.TheresultsindicatethatboththevaporbubblecontractionandtheMarangoniflowmayincreasetheheattransferaroundthevaporbubbleandmaycausethebubbletomoveawayfromtheheatingsurface,furtherincreasingheattransfer.
出版日期
1998年01月11日(中国期刊网平台首次上网日期,不代表论文的发表时间)