Pub Date : 2022-01-01DOI: 10.1299/jfst.2022jfst0009
T. Okabe, K. Shirai, Takumi Okawa, J. Okajima, Minori Shirota
{"title":"Phase diagram for the spreading behavior of water drops impacting hot walls observed via high-speed IR imaging","authors":"T. Okabe, K. Shirai, Takumi Okawa, J. Okajima, Minori Shirota","doi":"10.1299/jfst.2022jfst0009","DOIUrl":"https://doi.org/10.1299/jfst.2022jfst0009","url":null,"abstract":"","PeriodicalId":44704,"journal":{"name":"Journal of Fluid Science and Technology","volume":null,"pages":null},"PeriodicalIF":0.8,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"66306899","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-01-01DOI: 10.1299/jfst.2022jfst0007
Takumi Takase, Daisuke Sasaki, M. Okamoto
{"title":"Aerodynamic study of a circular arc airfoil at low Reynolds numbers using Cartesian mesh CFD","authors":"Takumi Takase, Daisuke Sasaki, M. Okamoto","doi":"10.1299/jfst.2022jfst0007","DOIUrl":"https://doi.org/10.1299/jfst.2022jfst0007","url":null,"abstract":"","PeriodicalId":44704,"journal":{"name":"Journal of Fluid Science and Technology","volume":null,"pages":null},"PeriodicalIF":0.8,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"66306516","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-01-01DOI: 10.1299/jfst.2022jfst0011
Hiroaki Arata, M. Kishida, T. Kurahashi
{"title":"Texture shape optimization analysis using a new acceleration gradient method based on the Taylor expansion and conjugate direction","authors":"Hiroaki Arata, M. Kishida, T. Kurahashi","doi":"10.1299/jfst.2022jfst0011","DOIUrl":"https://doi.org/10.1299/jfst.2022jfst0011","url":null,"abstract":"","PeriodicalId":44704,"journal":{"name":"Journal of Fluid Science and Technology","volume":null,"pages":null},"PeriodicalIF":0.8,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"66307082","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-01-01DOI: 10.1299/jfst.2022jfst0004
K. Miyaji, Hiroto Takegawa
{"title":"Prediction of transonic 2D wing flutter using the time-spectral computational fluid dynamics","authors":"K. Miyaji, Hiroto Takegawa","doi":"10.1299/jfst.2022jfst0004","DOIUrl":"https://doi.org/10.1299/jfst.2022jfst0004","url":null,"abstract":"","PeriodicalId":44704,"journal":{"name":"Journal of Fluid Science and Technology","volume":null,"pages":null},"PeriodicalIF":0.8,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"66306454","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-01-01DOI: 10.1299/jfst.2022jfst0012
Y. Nishio, T. Ogawa, Yukika Toda, Masataka Morimatsu, Ryohei Unno, A. Inasawa
{"title":"Theoretical investigation of discharge and pressure distribution of a pipe with a continuous longitudinal slot","authors":"Y. Nishio, T. Ogawa, Yukika Toda, Masataka Morimatsu, Ryohei Unno, A. Inasawa","doi":"10.1299/jfst.2022jfst0012","DOIUrl":"https://doi.org/10.1299/jfst.2022jfst0012","url":null,"abstract":"","PeriodicalId":44704,"journal":{"name":"Journal of Fluid Science and Technology","volume":null,"pages":null},"PeriodicalIF":0.8,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"66307161","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-01-01DOI: 10.1299/jfst.2022jfst0002
K. Bando, R. Otomo, Yuma Suzuki, Takamori Shiomi, Yusuke Nishizaki
{"title":"Energy generation characteristics of pressure retarded osmosis using polymer solution","authors":"K. Bando, R. Otomo, Yuma Suzuki, Takamori Shiomi, Yusuke Nishizaki","doi":"10.1299/jfst.2022jfst0002","DOIUrl":"https://doi.org/10.1299/jfst.2022jfst0002","url":null,"abstract":"","PeriodicalId":44704,"journal":{"name":"Journal of Fluid Science and Technology","volume":null,"pages":null},"PeriodicalIF":0.8,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"66306806","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-01-01DOI: 10.1299/jfst.2022jfst0014
T. Kawano, M. Fuchiwaki
{"title":"Pressure drop mechanisms in a cooling system enclosure","authors":"T. Kawano, M. Fuchiwaki","doi":"10.1299/jfst.2022jfst0014","DOIUrl":"https://doi.org/10.1299/jfst.2022jfst0014","url":null,"abstract":"","PeriodicalId":44704,"journal":{"name":"Journal of Fluid Science and Technology","volume":null,"pages":null},"PeriodicalIF":0.8,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"66307011","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-01-01DOI: 10.1299/jfst.2022jfst0015
M. Endo, Kosuke Suzuki, M. Yoshino
{"title":"Sensitivity to the application range of buoyancy force in the diffuse-interface immersed boundary method","authors":"M. Endo, Kosuke Suzuki, M. Yoshino","doi":"10.1299/jfst.2022jfst0015","DOIUrl":"https://doi.org/10.1299/jfst.2022jfst0015","url":null,"abstract":"","PeriodicalId":44704,"journal":{"name":"Journal of Fluid Science and Technology","volume":null,"pages":null},"PeriodicalIF":0.8,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"66307130","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-01-01DOI: 10.1299/jfst.2021jfst0022
Miho Tanaka, T. Fukui, M. Kawaguchi, K. Morinishi
{"title":"Numerical simulation on the effects of power-law fluidic properties on the suspension rheology","authors":"Miho Tanaka, T. Fukui, M. Kawaguchi, K. Morinishi","doi":"10.1299/jfst.2021jfst0022","DOIUrl":"https://doi.org/10.1299/jfst.2021jfst0022","url":null,"abstract":"","PeriodicalId":44704,"journal":{"name":"Journal of Fluid Science and Technology","volume":null,"pages":null},"PeriodicalIF":0.8,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"66306779","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-01-01DOI: 10.1299/jfst.2021jfst0015
K. Noda, T. Inaba
A numerical calculation model for gas-liquid unsteady two-phase flow in a micro channel was established and validated. The model focuses on flow in a channel including air gaps. It also reduces calculation cost by minimizing the number of control-volume elements compared with conventional numerical methods for gasliquid two-phase flow. Gas-liquid two-phase flow in channels with diameters of 1 to 2 mm is important in liquid transportation in chemical processing and analysis. As for designing flow channels in chemical processing and analysis, simple numerical models are desirable to evaluate many possible patterns quickly. The model uses moving boundaries that correspond to gas-liquid interfaces, but it represents boundaries between different channels with fixed boundaries. By setting several different configurations of air gaps, the numerical model was validated in regard to position and volume of air gaps in the channel. As an application of the numerical model to the design of flow channels in chemical processing and analysis, the necessary movement conditions of a syringe pump to achieve quick liquid transportation were investigated. By applying the numerical model, the necessary conditions to minimize flow rate oscillation were determined. In simulation-based design of microchannel, the numerical model in this research is an effective tool to determine design parameters quickly.
{"title":"One-dimensional numerical calculation for unsteady gas-liquid flow in micro channels with air gaps","authors":"K. Noda, T. Inaba","doi":"10.1299/jfst.2021jfst0015","DOIUrl":"https://doi.org/10.1299/jfst.2021jfst0015","url":null,"abstract":"A numerical calculation model for gas-liquid unsteady two-phase flow in a micro channel was established and validated. The model focuses on flow in a channel including air gaps. It also reduces calculation cost by minimizing the number of control-volume elements compared with conventional numerical methods for gasliquid two-phase flow. Gas-liquid two-phase flow in channels with diameters of 1 to 2 mm is important in liquid transportation in chemical processing and analysis. As for designing flow channels in chemical processing and analysis, simple numerical models are desirable to evaluate many possible patterns quickly. The model uses moving boundaries that correspond to gas-liquid interfaces, but it represents boundaries between different channels with fixed boundaries. By setting several different configurations of air gaps, the numerical model was validated in regard to position and volume of air gaps in the channel. As an application of the numerical model to the design of flow channels in chemical processing and analysis, the necessary movement conditions of a syringe pump to achieve quick liquid transportation were investigated. By applying the numerical model, the necessary conditions to minimize flow rate oscillation were determined. In simulation-based design of microchannel, the numerical model in this research is an effective tool to determine design parameters quickly.","PeriodicalId":44704,"journal":{"name":"Journal of Fluid Science and Technology","volume":null,"pages":null},"PeriodicalIF":0.8,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"66306186","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}