%0 Journal Article
%T Evaporation induced solidification of cyclohexane drops under acoustic levitation condition<br>声悬浮条件下环己烷液滴的蒸发凝固
%A Du Ren-Jun
%A Xie Wen-Jun
%A <br>杜人君
%A 解文军
%J 物理学报
%D 2011
%I 
%X The evaporation process of a cyclohexane drop is investigated by single-axis acoustic levitation method. It is found that the evaporation of the cyclohexane drop results in the decrease of its temperature below the melting point, and leading to solidification. The real-time observation with a high speed camera shows that the cyclohexane nucleates near the equator of the drop surface and grows dendritically with an average velocity ranging from 12.5 to 160.4 mm/s. Further studies indicate that the ratio Sh/Nu of the average Sherwood number to Nusselt number under acoustic levitation condition is 1.3 times of that under natural convection condition. This suggests that the acoustic streaming boundary layer effectively strengthens the evaporation but has less promotion effect on the heat transfer. Therefore, the drop temperature declines to a lower value and the evaporation induced solidification occurs under acoustic levitation condition. Accordingly, a necessary condition for the occurrence of evaporation induced solidification of volatile liquids is proposed.
%K acoustic levitation
%K acoustic streaming
%K cyclohexane
%K evaporation induced solidification<br>声悬浮
%K 声流
%K 环己烷
%K 蒸发凝固
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=6E709DC38FA1D09A4B578DD0906875B5B44D4D294832BB8E&cid=47EA7CFDDEBB28E0&jid=29DF2CB55EF687E7EFA80DFD4B978260&aid=7FB288757ED284A09EBBA335D0E42424&yid=9377ED8094509821&vid=BFE7933E5EEA150D&iid=708DD6B15D2464E8&sid=26748DF47E199750&eid=26748DF47E199750&journal_id=1000-3290&journal_name=物理学报&referenced_num=0&reference_num=21