Capillary Flow in Cylindrical Containers with Rounded Interior Corners

Chen, Yongkang; Weislogel, Mark; Bolleddula, Daniel

doi:10.2514/6.2007-745

Cited by 6 publications

(3 citation statements)

References 11 publications

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“…Given sufficient time another equilibrium state will be reached in a finitevolume container but generally not during the shortduration provided by drop tower tests. Capillary driven flow has been studied in a variety of geometries such as perfect interior corners (Weislogel and Lichter 1998) and rounded interior corners (Smedley 1990b;Chen et al , 2007. Note that the capillary driven flow defined above is different from interface reorientation which is also driven by capillary forces in similar situations, as an example can be found in Weislogel and Ross (1990).…”

Section: Drop Tower Experimentsmentioning

confidence: 96%

Studies of the Wetting of Gaps in Weightlessness

Collicott

Chen

2010

Microgravity Sci. Technol.

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The geometry of a thin sheet metal vane terminating near a wall in a surface tension propellant management device (PMD) is common in devices designed by various people. A research program into the capillary fluid physics of the common vane-wall gap began in 1998 with the arrival of the second author at the School of Aeronautics and Astronautics at Purdue University. Drop tower experiments, Surface Evolver computations, and analysis were combined to explore the details of the fluid behavior in the vane-wall gap geometry. Results of four vane-wall gap experiment topics: critical wetting, advance rates, sensitivity to vane orientation, and effect of imperfect initial conditions, are discussed here. This work led to a desire by Weislogel to incorporate this type of geometry into his "Capillary Fluids Experiment" (CFE) that operated flawlessly on the International Space Station in 2006 and 2007. It is found that the wetting of vanewall gaps is predicted correctly through use of the critical wetting analysis of Concus and Finn. Furthermore, the dynamics of the wetting flows are found to have scaling of flow rates versus time similar to those known for capillary advances in solid corners. In some

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Section: Drop Tower Experimentsmentioning

confidence: 96%

Studies of the Wetting of Gaps in Weightlessness

Collicott

Chen

2010

Microgravity Sci. Technol.

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“…And a similarity solution of the spontaneous capillary flow in rounded corners is obtained. Furthermore, Chen et al [9] performed drop tower experiments to benchmark the analytical results. It is shown that the analytical predictions compare well with experiments.…”

Section: Introductionmentioning

confidence: 99%

Capillary flow along rounded interior corner of right angle under microgravity

Kang

Hou

et al. 2008

SPIE Proceedings

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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 0 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. Downloaded From: http://proceedings.spiedigitallibrary.org/ on 07/15/2016 Terms of Use: http://spiedigitallibrary.org/ss/TermsOfUse.aspx R 6 R2.4 R4.8 Proc. of SPIE Vol. 7375 73751X-2 Downloaded From: http://proceedings.spiedigitallibrary.org/ on 07/15/2016 Terms of Use: http://spiedigitallibrary.org/ss/TermsOfUse.aspx

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“…Namely, the liquid can form stable interfacial structure easily. Chen et al (2006Chen et al ( , 2007 set up suitable non-dimensional flow resistance equations with appropriate non-dimensional methods, obtained the approximate analytical solution of capillary driven flow in the rounded interior corner, and verified the results with experiments in drop tower. The results showed that the climbing velocity would be reduced in rounded corner.…”

Section: Introductionmentioning

confidence: 99%

Study of Capillary Driven Flow in an Interior Corner of Rounded Wall Under Microgravity

Liu

et al. 2015

Microgravity Sci. Technol.

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The capillary driven flow in cylindrical interior corners satisfying the Concus-Finn condition was investigated under microgravity. The governing equation of capillary driven flow in cylindrical interior corners was established, and the approximate analytical solution was obtained. The relationship between liquid's front position and time was derived, which was then compared with the results of drop tower experiments and numerical simulation using the FLOW-3D software. The influence of different parameters on the interior corner flow was studied. The results showed that the meniscus height decreased as contact angle increased, and increased as the radius of rounded wall increased. The influence of decreasing the contact angle on a rounded wall was greater than that on a straight wall. Our findings can be referred to designing tanks or choosing the suitable solution in the space fluid management.

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Capillary Flow in Cylindrical Containers with Rounded Interior Corners

Cited by 6 publications

References 11 publications

Studies of the Wetting of Gaps in Weightlessness

Studies of the Wetting of Gaps in Weightlessness

Capillary flow along rounded interior corner of right angle under microgravity

Study of Capillary Driven Flow in an Interior Corner of Rounded Wall Under Microgravity

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