The experiments regarding the contact angle behavior of pendant and sessile evaporating drops were carried out in microgravity environment. All the experiments were performed in the Drop Tower of Beijing, which could supply about 3.6 s of microgravity (free-fall) time. In the experiments, firstly, drops were injected to create before microgravity. The wettability at different surfaces, contact angles dependance on the surface temperature, contact angle variety in sessile and pendant drops were measured. Different influence of the surface temperature on the contact angle of the drops were found for different substrates. To verify the feasibility of drops creation in microgravity and obtain effective techniques for the forthcoming satellite experiments, the authors tried to inject liquid to create bigger drop as soon as the drop entering microgravity condition. The contact angle behaviors during injection in microgravity were also obtained.
Experimental investigation of pendant and sessile drops in microgravity
Experimentelle Untersuchung hängender und nicht gleitender Tropfen unter Mikrogravitätsbedingungen
International Topical Team Workshop on Two-Phase Systems for Ground and Space Applications, 5 ; 339-345
Microgravity Science and Technology ; 22 , 3
2010
7 Seiten, 9 Bilder, 2 Tabellen, 19 Quellen
Conference paper
English
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