Bubble Resident Characteristics and Stabilization Mechanism on Liquid-infused Porous Surfaces

doi:10.3901/JME.2024.21.232

Abstract

Abstract: The precipitation and resident behavior of bubbles on liquid-infused porous surfaces significantly affect the gas-liquid two-phase flow field and the functional properties of porous surfaces. The subjects of the study are microporous pores of both stainless steel and polytetrafluoroethylene (PTFE) materials. A numerical model is established to analyze the changes in bubble precipitation morphology and the effect of bubble residence behavior on the gas-liquid two-phase flow field and to reveal the bubble resident characteristics and stable resident mechanism on the porous surface. The study shows gas precipitates as a convex interface in stainless steel pores. The bubbles reside and grow steadily in the orifice until the precipitation volume is too large, and the bubbles neck and detach from the orifice. PTFE pore gas precipitation in the form of a concave interface. The bubble resides at the orifice briefly and then undergoes several destabilization processes such as lateral spreading, retraction, necking, and detachment. When the bubble precipitates, its three-phase contact line pinning causes a vortex phenomenon in the flow field. The surface vortex of stainless steel occurs near the bubble center and the gas-liquid interface; the surface vortex of PTFE occurs in the bubble center, near the gas-liquid interface, and in the liquid surface film. Therefore, PTFE surface bubbles strongly perturb the gas-liquid two-phase flow field and are prone to resident instability. The resident behavior of the bubbles on the porous surface is affected by the three-phase contact line state. And the bubbles are stable when the three-phase contact line is pinned, while the bubbles no longer remain stable after the three-phase contact line is unpinned. Compared to hydrophobic PTFE, air bubbles are more likely to reside stably on hydrophilic stainless steel surfaces, to ensure stable lubrication and drag reduction on the surface.

Key words: liquid-infused porous surfaces, bubble, resident stability, wetting, lubrication and drag reduction

CLC Number:

TH117

ZHANG Guotao, CAI Weijie, TONG Baohong, TU Deyu, LIU Qingyun. Bubble Resident Characteristics and Stabilization Mechanism on Liquid-infused Porous Surfaces[J]. Journal of Mechanical Engineering, 2024, 60(21): 232-242.

References

[1] SONG Tingting，LIU Qi，LIU Jingyuan，et al. Fabrication of super slippery sheet-layered and porous anodic aluminium oxide surfaces and its anticorrosion property[J]. Applied Surface Science，2015，355：495-501.
[2] ZHUO Yizhi，WANG Feng，XIAO Senbo，et al. One-step fabrication of bioinspired lubricant-regenerable icephobic slippery liquid-Infused porous surfaces[J]. ACS Omega，2018，3：10139-10144.
[3] XIANG Tengfei，ZHANG Min，SADIG H，et al. Slippery liquid-infused porous surface for corrosion protection with self-healing property[J]. Chemical Engineering Journal，2018，345：147-155.
[4] SAKURABA K，KITANO S，KOWALSKI D，et al. Slippery liquid-infused porous surfaces on aluminum for corrosion protection with improved self-healing ability[J]. ACS Applied Materials & Interfaces，2021，13：45089-45096.
[5] WANG Jiadao，WANG Bao，CHEN Darong. Underwater drag reduction by gas[J]. Friction，2014，2(4)：295-309.
[6] LI Jiang，CHEN Haosheng，ZHOU Weizheng，et al. Growth of bubbles on a solid surface in response to a pressure reduction[J]. Langmuir，2014，30(15)：4223-4228.
[7] 徐行，张立保，舒现维，等. 孔隙深度对多孔储液介质摩擦学性能的影响研究[J]. 摩擦学学报，2022，42(3)：570-579. XU Xing，ZHANG Libao，SHU Xianwei，et al. Tribological properties of the porous liquid storage medium with different pore depths[J]. Tribology，2022，42(3)：570-579.
[8] 秦红玲，徐行，舒现维，等. 多孔储液介质自润滑机理研究进展[J]. 机械工程学报，2022，58(19)：166-179. QIN Hongling，XU Xing，SHU Xianwei，et al. Research progress on the self-lubrication mechanism of liquid-porous medium[J]. Journal of Mechanical Engineering，2022，58(19)：166-179.
[9] LU Yan. Drag reduction by nanobubble clusters as affected by surface wettability and flow velocity：Molecular dynamics simulation[J]. Tribology International，2019，137：267-273.
[10] 戴双武，卢艳. 微结构及温度耦合下的微通道纳米气泡滑移效应[J]. 机械工程学报，2022，58(11)：249-259. DAI Shuangwu，LU Yan. Slip effect of microchannel nanobubbles under the coupling of microstructure and temperature[J]. Journal of Mechanical Engineering，2022，58(11)：249-259.
[11] DILIP D，KUMAR S，BOBJI M，et al. Sustained drag reduction and thermo-hydraulic performance enhancement in textured hydrophobic microchannels[J]. International Journal of Heat & Mass Transfer，2018，119：551-563.
[12] 朱睿，庄启彬，李尚，等. 电解微气泡生长行为及驻留稳定性[J]. 兵工学报，2021，42(5)：1023-1031. ZHU Rui，ZHUANG Qibin，LI Shang，et al. Growth behaviors and resident stability of electrolyzed microbubble[J]. Acta Armamentarii，2021，42(5)：1023-1031.
[13] WANG Hanwen，WANG Kaiying，LIU Guohua. Drag reduction by gas lubrication with bubbles[J]. Ocean Engineering，2022，258(15)：111833.
[14] CAI Jiejin，GONG Ziqi，TAN Bing. Experimental and theoretical investigation of bubble dynamics on vertical surfaces with different wettability for pool boiling[J]. International Journal of Thermal Sciences，2023，184：107966.
[15] HIRT C，NICHOLS B. Volume of fluid (VOF) method for the dynamics of free boundaries[J]. Journal of Computational Physics 1981，39(1)：201-225.
[16] BRACKILL J，KOTHE D，ZEMACH C. A continuum method for modeling surface tension[J]. Journal of Computational Physics，1992，100(2)：335-354.
[17] KISTLER S. Hydrodynamics of wetting；Wettability[M]. Marcel Dekker：New York，1993；311-429.
[18] MIRSANDI H，SMIT W，KONG G，et al. Influence of wetting conditions on bubble formation from a submerged orifice[J]. Experiments in Fluids，2020，61：83.
[19] GNYLOSKURENKO S，BYAKOVA A，RAYCHENKO T，et al. Influence of wetting conditions on bubble formation at orifice in an inviscid liquid. Transformation of bubble shape and size[J]. Colloids and Surfaces A：Physicochemical and Engineering Aspects，2003，218：73-87.
[20] THEODORAKIS P，AMIRFAZLI A，HU B，et al. Droplet control based on pinning and substrate wettability[J]. Langmuir，2021，37：4248-4255.