Zobrazeno 1 - 10 of 156 pro vyhledávání: '"Ryuhei Yamaguchi"'
1
Akademický článek
Hydrodynamic Fingering Induced by Gel Film Formation in Miscible Fluid Systems: An Experimental and Mathematical Study
Autor: Muhammad Nasir, Ryuhei Yamaguchi, Yun She, Anindityo Patmonoaji, Mohammad Azis Mahardika, Weicen Wang, Zijing Li, Shintaro Matsushita, Tetsuya Suekane
Publikováno v: Applied Sciences, Vol 12, Iss 10, p 5043 (2022)
Hydrodynamic fingering induced by gel formation shares common features with growing biofilms, bacterial colonies, and the instability of a confined chemical garden. Fluid displacement with gel formation is also essential in various engineering applic
Externí odkaz: https://doaj.org/article/0d64e8bc22fe4d15b6f389f4a53f15f4
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4
Numerical Simulation of Flow Behavior in Basilar Bifurcation Aneurysms Based on 4-Dimensional Computed Tomography Angiography
Autor: Ryuhei Yamaguchi, Hitomi Anzai, Tomoaki Yamazaki, Gaku Tanaka, Fujimaro Ishida, Yodai Okazaki, Makoto Ohta
Publikováno v: World Journal of Mechanics. 11:71-82
Initiation, growth, and rupture of cerebral aneurysms are caused by hemodynamic factors. It is extensively accepted that the cerebral aneurysm wall is assumed to be rigid using computational fluid dynamics (CFD). Furthermore, fluid-structure interact
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::2f1ab140dc29699b3cc6306992552efe
https://doi.org/10.4236/wjm.2021.114006
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5
Hemodynamic and Flow Recirculation Effect on Rupture Prediction of Middle Cerebral Artery Aneurysm
Autor: Kahar Osman, Ryuhei Yamaguchi, Gaku Tanaka, Atsushi Saitoh, Ahmad Zahran Md Khudzari, Makoto Ohta, Nadia Shaira Shafii
Publikováno v: Journal of Advanced Research in Fluid Mechanics and Thermal Sciences. 79:1-16
The mortality and morbidity rate due to the severe effect of intracranial aneurysm (IA) is increasing, which has driven research trend on aneurysm rupture risk. By understanding the nature and causes of the aneurysm rupture, preventive measures could
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::62aa818da47f7891cce1b409bb0961d1
https://doi.org/10.37934/arfmts.79.1.116
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6
Akademický článek
Low-frequency harmonics in inlet flow rate play a crucial role in inducing flow instabilities in terminal cerebral aneurysms
Autor: Lijian XU, Atsushi SAITO, Yoko YOKOYAMA, Kenya SATO, Tatsuya SASAKI, Ryuhei YAMAGUCHI, Michiko SUGAWARA, Hao LIU
Publikováno v: Journal of Biomechanical Science and Engineering, Vol 11, Iss 3, Pp 16-00117-16-00117 (2016)
Prediction of rupture status in cerebral aneurysms remains challenging for clinicians, and the important rupture indicator (wall shear stress, WSS) is controversially discussed. Recent studies report that flow instabilities appear to play an influent
Externí odkaz: https://doaj.org/article/dddb649fd58b4370946a72b8cc8b0360
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7
Akademický článek
Intracellular Ca2+ Responses in Cultured Endothelial Cells to Mechanical Stimulation by Laser Tweezers
Autor: Noriyuki KATAOKA, Ken HASHIMOTO, Susumu KUDO, Ryuhei YAMAGUCHI, Katsuhiko TSUJIOKA, Fumihiko KAJIYA
Publikováno v: Journal of Biomechanical Science and Engineering, Vol 3, Iss 2, Pp 116-123 (2008)
It is well known that endothelial cells (ECs) respond to the fluid imposed shear stress and change their shapes and functions. We have focused on the importance of cytoplasmic micro-mechanical strain in mechano-sensing mechanism of ECs. To this end,
Externí odkaz: https://doaj.org/article/0e909e1c8fe642d1b8f7c540f8d24b7f
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8
Akademický článek
Fluid Dynamics in Normal and Stenosed Human Renal Arteries: an Experimental and Computational Study
Autor: Fuyou LIANG, Ryuhei YAMAGUCHI, Hao LIU
Publikováno v: Journal of Biomechanical Science and Engineering, Vol 1, Iss 1, Pp 171-182 (2006)
Atherosclerotic renal artery stenosis (RAS), which accounts for approximately 7% of peripheral vascular diseases, is considered a major cause for secondary hypertension and other renal complications such as chronic renal failure and ischemic nephropa
Externí odkaz: https://doaj.org/article/9ff80301fa17402aa16c69ee19995d5b
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9
Effects of Elasticity on Wall Shear Stress in Patient-Specific Aneurysm of Cerebral Artery
Autor: Kazuhiro Watanabe, Nadia Shaira Shafii, Hitomi Anzai, Gaku Tanaka, Kahar Osman, Atsushi Saito, Ryuhei Yamaguchi, Makoto Ohta, Taihei Kotani, Simon Tupin, Ahmad Zahran Md Khudzari
Publikováno v: Journal of Flow Control, Measurement & Visualization. :73-86
The behavior of wall shear stress (WSS) was previously reported in a deformable aneurysm model using fluid-structure interactions. However, these findings have not been validated. In the present study, we examined the effect of elasticity (i.e., defo
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::abb850c3033502677e0ab78a1c729494
https://doi.org/10.4236/jfcmv.2019.72006
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10
Characteristic effect of wall elasticity on flow instability and wall shear stress of a full-scale, patient-specific aneurysm model in the middle cerebral artery: An experimental approach
Autor: Ryuhei Yamaguchi, Gaku Tanaka, Nadia Shaira Shafii, Kahar Osman, Yasutomo Shimizu, Khalid M. Saqr, Makoto Ohta
Publikováno v: Journal of Applied Physics. 131:184701
The mechanisms underlying the growth and rupture of aneurysms are poorly understood. Although the wall shear stress (WSS) in elastic aneurysm models is examined using fluid-structure interaction (FSI) simulations, it has not been sufficiently validat
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::66ee031b27dff91cab0d5b511743e1fe
https://doi.org/10.1063/5.0085417
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