Combined Two-Phase Thermal Control System with Parallel Capillary Pumps

Shilkin, O. V.; Kishkin, A. A.; Shevchenko, Yu. N.; Делков, А В; Лавров, Н. А.

doi:10.1007/s10556-021-00935-8

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“…In microfluidics, one of the most interesting phenomena is the capillarity. Due to the small sizes of components, generally in the sub millimeter or even smaller scale, the capillarity is very strong and is widely employed in various applications, such as capillary pumps [ 1 , 2 , 3 ] and valves [ 4 , 5 , 6 , 7 ], gas debubbling [ 8 ], and other applications [ 9 ]. Differently to external operations based on instruments, the capillarity is an inherent phenomenon of liquids and can be employed independently.…”

Section: Introductionmentioning

confidence: 99%

Experiment—Simulation Comparison in Liquid Filling Process Driven by Capillarity

et al. 2022

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This paper studies modifications made to the Bosanquet equation in order to fit the experimental observations of the liquid filling process in circular tubes that occurs by capillary force. It is reported that there is a significant difference between experimental observations and the results predicted by the Bosanquet equation; hence, it is reasonable to investigate these differences intensively. Here, we modified the Bosanquet equation such that it could consider more factors that contribute to the filling process. First, we introduced the air flowing out of the tube as the liquid inflow. Next, we considered the increase in hydraulic resistance due to the surface roughness of the inner tube. Finally, we further considered the advancing contact angle, which varies during the filling process. When these three factors were included, the modified Bosanquet equation was well correlated with the experimental results, and the R square—which indicates the fitting quality between the simulation and the experiment—significantly increased to above 0.99.

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