Capillary Phenomena in Tubes Under Microgravity

Chen, Shangtong; Wu, Di; Li, Wen; Ding, Fenglin; Kang, Qi; Li, Yong

doi:10.1007/s13538-023-01328-3

Cited by 3 publications

(2 citation statements)

References 43 publications

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“…Static liquid–gas interfaces under microgravity and normal gravity have also been deeply analyzed. Theoretical expressions for profiles of liquid drops on walls of revolutions under microgravity have been derived from the Young–Laplace equation. − Michielsen et al obtained the static position and free surfaces of liquid drops in conical fibers by seeking the minimum free-surface energy. Chen et al − used the shooting method to predict the free surfaces for a given liquid volume.…”

Section: Introductionmentioning

confidence: 99%

“…Theoretical expressions for profiles of liquid drops on walls of revolutions under microgravity have been derived from the Young–Laplace equation. − Michielsen et al obtained the static position and free surfaces of liquid drops in conical fibers by seeking the minimum free-surface energy. Chen et al − used the shooting method to predict the free surfaces for a given liquid volume. Theoretical expressions of profiles of capillary bridges between different structures under microgravity have also been derived from the Young–Laplace equation. − …”

Section: Introductionmentioning

confidence: 99%

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Profiles of Static Liquid–Gas Interfaces in Axisymmetric Containers with Different Accelerations

Chen,

Gao,

et al. 2024

Langmuir

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Second-order perturbation solutions of profiles of bubbles suspended in liquid and liquid−gas interfaces when liquid all sinks in the bottom with different accelerations are derived. Six procedures are developed based on these solutions, and they are divided into two types. One type takes the coordinates of end points of profiles as input, and the other type takes liquid volume or gas volume as input. Numerical simulations are performed with the Volume of Fluid method, and numerical results are in good agreement with the predictions of these procedures. The greater the acceleration, the flatter the bubble until all liquid sinks to the bottom. Effects of acceleration on bubble shape must be considered; otherwise, it will cause a volume prediction error of up to 10%. When all liquid sinks to the bottom, predictions of liquid volume with the same liquid meniscus height as inputs differ considerably for different accelerations. The most significant change in liquid volume occurs when the bond number Bo ≪ 1. Effects of acceleration and liquid contact angle on the liquid−gas interfaces must be considered when evaluating liquid residue. These findings should be quite helpful for liquid residue measurement and fine management in spacecraft.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Profiles of Static Liquid–Gas Interfaces in Axisymmetric Containers with Different Accelerations

Chen,

Gao,

et al. 2024

Langmuir

Self Cite

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Synthesis of Co@CoO/C by micro-tube method and their electrochemical performances

Du,

Jin,

Liu

et al. 2024

Heliyon

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Static analysis and contact angle hysteresis study of bubbles in Chinese space station tank models under different gravity effects

Chen,

et al. 2024

Physics of Fluids

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In most space shuttle fuel tanks, a central column is used to secure the Propellant Management Devices. This study focuses on the distribution of fluids in such tanks. Microgravity experiments are conducted on the Chinese Space Station, and annular bubbles surrounding the central column have been observed for the first time. An in-depth study is carried out on the distribution and profile of these bubbles using perturbation methods and the Young–Laplace equation. Theoretical values for the gas–liquid interface morphology of annular bubbles under different gravity levels are obtained and compared with numerical simulation results, showing substantial agreement. The phenomenon of contact angle hysteresis of bubbles under gravity conditions was studied through simulation and theoretical analysis. Detailed analysis of the characteristics of contact angle hysteresis and corresponding drag resistance using the Wenzel model was carried out. Based on this, a numerical calculation program based on the shooting method was developed to obtain the morphology of the same bubble under different gravities. Furthermore, it was found that the theoretical maximum Bond number for circular bubbles suspended on the central column is 2, and it was observed that bubbles with equilibrium contact angles closer to 90° exhibit greater upward displacement of their centroids under varying gravity, providing theoretical support for bubble management in aerospace engineering.

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Capillary Phenomena in Tubes Under Microgravity

Cited by 3 publications

References 43 publications

Profiles of Static Liquid–Gas Interfaces in Axisymmetric Containers with Different Accelerations

Profiles of Static Liquid–Gas Interfaces in Axisymmetric Containers with Different Accelerations

Synthesis of Co@CoO/C by micro-tube method and their electrochemical performances

Static analysis and contact angle hysteresis study of bubbles in Chinese space station tank models under different gravity effects

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