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ISSN Druckformat: 1091-028X
ISSN Online: 1934-0508
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DYNAMIC COMPRESSION OF SOFT POROUS MEDIA: FROM FINITE TO INFINITE DOMAIN
ABSTRAKT
In recent studies about lift generation in porous media, dynamic compression experiments have been performed using a porous-walled cylinder-piston apparatus, where the air trapped inside a porous layer underneath the loaded piston was forced out through the porous wall to the ambient, namely, "finite domain," oversimplifying real applications where transiently trapped fluid is squeezed out to the surrounding porous structures, that is, "infinite domain." In the current paper we treat this shortcoming experimentally. A soft, polyester, fibrous, porous material was chosen for the study. Its microstructure was characterized using a scanning electronic microscope. Its porosity was measured using a water-displacement method, and its permeability was determined using a permeameter. The cylinder-piston apparatus was first used in a quasi-static experiment to examine the material’s stiffness and was then used in the dynamic compaction experiments in the infinite domain. Detailed pressure distribution was examined. The results indicate that the air lifting force is enhanced by 25 to 30% for the infinite domain over the finite domain due to the existence of the surrounding porous material. The pore pressure, however, relaxes rapidly in the undeformed surroundings. These observations improve our understanding of the dynamic response of soft porous media under rapid compression.
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Crawford Robert, Nathan Rungun, Wang Liyun, Wu Qianhong, Experimental study on the lift generation inside a random synthetic porous layer under rapid compaction, Experimental Thermal and Fluid Science, 36, 2012. Crossref
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Crawford Robert, Jones Gerard F., You Lidan, Wu Qianhong, Compression-dependent permeability measurement for random soft porous media and its implications to lift generation, Chemical Engineering Science, 66, 3, 2011. Crossref
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Gacka T., Zhu Z., Crawford R., Nathan R., Wu Q., From red cells to soft lubrication, an experimental study of lift generation inside a compressible porous layer, Journal of Fluid Mechanics, 818, 2017. Crossref
-
Wu Qianhong, Santhanam Sridhar, Nathan Rungun, Wang Qiuyun, A biphasic approach for the study of lift generation in soft porous media, Physics of Fluids, 29, 4, 2017. Crossref
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Wu Zhenxing, Mirbod Parisa, Experimental analysis of the flow near the boundary of random porous media, Physics of Fluids, 30, 4, 2018. Crossref
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Wang Qiuyun, Pei Shaopeng, Lu X. Lucas, Wang Liyun, Wu Qianhong, On the characterization of interstitial fluid flow in the skeletal muscle endomysium, Journal of the Mechanical Behavior of Biomedical Materials, 102, 2020. Crossref
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Wang Qiuyun, Zhu Zenghao, Nathan Rungun, Wu Qianhong, On the study of fluid flow in a soft porous media using a scaled-up indenter, European Journal of Mechanics - B/Fluids, 76, 2019. Crossref
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Zhu Zenghao, Weinbaum Sheldon, Wu Qianhong, Experimental study of soft porous lubrication, Physical Review Fluids, 4, 2, 2019. Crossref
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Zhu Zenghao, Nathan Rungun, Wu Qianhong, On the Gravity-Driven Sliding Motion of a Planar Board on a Tilted Soft Porous Layer, Tribology Letters, 67, 4, 2019. Crossref