Capillary flow along rounded interior corner of right angle under microgravity

Qi Kang; Rui Hou; Li Duan; Liang Hu

doi:10.1117/12.839078

24 August 2009 Capillary flow along rounded interior corner of right angle under microgravity

Qi Kang, Rui Hou, Li Duan, Liang Hu

Proceedings Volume 7375, ICEM 2008: International Conference on Experimental Mechanics 2008; 73751X (2009) https://doi.org/10.1117/12.839078
Event: International Conference on Experimental Mechanics 2008 and Seventh Asian Conference on Experimental Mechanics, 2008, Nanjing, China

Abstract

It is crucial to investigate the capillary driven flows along interior corners because of the interior corners of space fluid management devices provide the main conduits for the transfer of fluids. In many instances, the interior corners are not perfectly sharp but rather possess a degree of roundedness due to the design or fabrication. In this work, the problem of capillary flows along rounded interior corners is revisited experimentally. Four test cells which are made of PMMA are designed. The cross sections of the four cells are the same pentagon except that one 90° corners are rounded with different radius R0 (sharp corner), R2.4, R4.8, R6, respectively. Four kinds of liquids are used in the microgravity drop tower tests, i.e. KF96-5 silicone oil, KF96-10, KF96-50 and Fluorinert liquid FC-70. The experimental results show that the advancing meniscus tip location of the fluid in the corner L (mm) is affected by container geometry and fluid properties. These experimental results are valuable to better understand the capillary flow and also can provide scientific guidance for the design and analysis of space fluid management systems.

Citation Download Citation

Qi Kang, Rui Hou, Li Duan, and Liang Hu "Capillary flow along rounded interior corner of right angle under microgravity", Proc. SPIE 7375, ICEM 2008: International Conference on Experimental Mechanics 2008, 73751X (24 August 2009); https://doi.org/10.1117/12.839078

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