|Influence of bond number on behaviors of liquid drops deposited onto solid substrates|
|Zhu ZQ(朱志强); Wang Y(汪洋); Liu QS(刘秋生); Jie JC(解京昌); Liu, QS; Chinese Acad Sci, Inst Mech, Key Lab Micrograv, Natl Micrograv Lab, Beijing 100190, Peoples R China.
|Source Publication||MICROGRAVITY SCIENCE AND TECHNOLOGY
|Abstract||The problem of spreading behaviors of pendant and sessile drops was studied experimentally and numerically under the action of gravity force and surface tension. Bond number was considered to be a main factor of the influence on shape behaviors of liquid drops. This study was performed in the framework of an experimental investigation of drop behaviors in microgravity onboard a Chinese satellite in future. The experiments were carried out in the Drop Tower of Beijing, which could supply about 3.6 s of microgravity (free-fall) time. The surface shape change of liquid drops was investigated and the contact angle variety in sessile and pendant drops were measured from normal gravity to microgravity. A sharp decrease and oscillatory variation of the contact angle for both sessile and pendant drops were found with the sudden decrease of Bond number. The succedent comparison between experimental and numerical results suggests that Bond number has a significant influence on the drop contact angle. Additionally, the drop shapes and the bulk flows inside sessile and pendant drops were analyzed numerically, and it was found that the bulk flows could affect the free-surface shape of liquid drops apparently. Comparison of the moving velocity of contact line between sessile and pendant drops indicated that the pendant drops had a faster response to Bond number.|
|Funding Organization||This research was financially supported by the National Natural Science Foundation of China (Grant Nos. 11072249 and 50890182) and the Knowledge Innovation Project of Chinese Academy of Sciences (CXJJ-10-M55), the Knowledge Innovation Project of Institute of Mechanics/CAS.
|Corresponding Author||Liu, QS; Chinese Acad Sci, Inst Mech, Key Lab Micrograv, Natl Micrograv Lab, Beijing 100190, Peoples R China.|
Zhu ZQ,Wang Y,Liu QS,et al. Influence of bond number on behaviors of liquid drops deposited onto solid substrates[J]. MICROGRAVITY SCIENCE AND TECHNOLOGY,2012,24(3):181-188.
Zhu ZQ,Wang Y,Liu QS,Jie JC,Liu, QS,&Chinese Acad Sci, Inst Mech, Key Lab Micrograv, Natl Micrograv Lab, Beijing 100190, Peoples R China..(2012).Influence of bond number on behaviors of liquid drops deposited onto solid substrates.MICROGRAVITY SCIENCE AND TECHNOLOGY,24(3),181-188.
Zhu ZQ,et al."Influence of bond number on behaviors of liquid drops deposited onto solid substrates".MICROGRAVITY SCIENCE AND TECHNOLOGY 24.3(2012):181-188.
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