Evaporation of Ethanol Drops on a Heated Substrate Under Microgravity Conditions

被引：30

作者：

Brutin, David ^{[1
]}

Zhu, Zhi-Qiang ^{[2
]}

Rahli, Ouamar ^{[1
]}

Xie, Jing-Chang ^{[2
]}

Liu, Qiu-Sheng ^{[2
]}

Tadrist, Lounes ^{[1
]}

机构：

[1] Ecole Polytech Univ Marseille, Lab IUSTI, Polytech Marseille, F-13453 Marseille, France

[2] Chinese Acad Sci, Inst Mech, Natl Micrograv Lab, Key Lab Micrograv, Beijing 100190, Peoples R China

来源：

MICROGRAVITY SCIENCE AND TECHNOLOGY | 2010年 / 22卷 / 03期

关键词：

Infrared visualization; Sessile drop; Liquid spreading; Capillary forces; Drop evaporation; CONTACT-ANGLE; LIQUID DROPLETS; TEMPERATURE; SURFACES; THERMOGRAPHY; CONVECTION;

D O I：

10.1007/s12217-010-9200-2

中图分类号：

V [航空、航天];

学科分类号：

08 ; 0825 ;

摘要：

We present in this paper results obtained from a parabolic flight campaign regarding ethanol sessile drop evaporation under reduced gravity conditions. Drops are created using a syringe pump by means of injection through a PTFE (polytetrafluoroethylene) substrate. The drops are recorded using a video camera and an infrared camera to observe the thermal motion inside the drop and on the heating substrate. The experimental set-up presented in this paper enables the simultaneous visualization and access to the heat flux density that is transferred to the drop using a heat flux meter placed between the heating block and the PTFE substrate. We evidence original thermal spreading phenomena during the ethanol drop creation on a heated PTFE substrate. The drop exhibits specific behaviour which is discussed here. This work is performed in the frame of a French-Chinese collaboration (project IMPACHT) for future experiments in a Chinese scientific satellite.

引用

页码：387 / 395

页数：9

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