摘要
Basedonthevolumeoffluid(VOF)method,weconductanumericalsimulationtostudythehydrodynamicbinarycoalescenceofdropletsunderairflowinahydrophobicrectangularmicrochannel.Twodistinctregimes,coalescencefollowedbyslidingmotionandthatfollowedbydetachingmotion,areidentifiedanddiscussed.Additionally,thedetailedhydrodynamicinformationbehindthebinarycoalescenceisprovided,basedonwhichadynamicmechanicalanalysisisconductedtorevealthehydrodynamicmechanismsunderlyingthesetworegimes.Thesimulationresultsindicatethattheslidingmotionofdropletsisdrivenbythedragforceandrestrainedbytheadhesionforceinducedbytheinterfacialtensionalongthemainflowdirection.Thedetachment(i.e.,upwardmotion)ofthedropletisdrivenbytheliftforceassociatedwithanaerodynamicliftingpressuredifferenceimposedonthecoalescentdroplet,andalsorestrainedbytheadhesionforceperpendiculartothemainflowdirection.Especially,theliftforceismainlyinducedbyanaerodynamicliftingpressuredifferenceimposedonthecoalescentdroplet.TwotypicalregimescanbequantitativelyrecognizedbyaregimediagramdependingonReandWe.ThehigherReandWerespectivelyleadtorelativelylargerliftforcesandsmalleradhesionforcesactingonthedroplet,bothofwhicharehelpfultodetachmentofthecoalesceddroplet.
出版日期
2019年02月12日（中国期刊网平台首次上网日期，不代表论文的发表时间）
