We present results of an experimental investigation of the temporal and spatial structure of a scalar plume developing within a turbulent boundary layer over a smooth bed. The source of the scalar plume is located flush with the bed, and the vertical momentum associated with the scalar release is extremely small. The source design is intended to simulate a diffusive-type scalar release.
{"title":"THE STRUCTURE OF PASSIVE SCALAR PLUMES IN TURBULENT BOUNDARY LAYERS","authors":"J. Crimaldi, J. Koseff","doi":"10.1615/tsfp2.190","DOIUrl":"https://doi.org/10.1615/tsfp2.190","url":null,"abstract":"We present results of an experimental investigation of the temporal and spatial structure of a scalar plume developing within a turbulent boundary layer over a smooth bed. The source of the scalar plume is located flush with the bed, and the vertical momentum associated with the scalar release is extremely small. The source design is intended to simulate a diffusive-type scalar release.","PeriodicalId":438618,"journal":{"name":"Proceeding of Second Symposium on Turbulence and Shear Flow Phenomena","volume":"155 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123193322","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}
{"title":"VORTICAL STRUCTURES RELATED TO WALL PRESSURE FLUCTUATIONS IN A TURBULENT BOUNDARY LAYER","authors":"M. Ichijo","doi":"10.1615/tsfp2.2000","DOIUrl":"https://doi.org/10.1615/tsfp2.2000","url":null,"abstract":"","PeriodicalId":438618,"journal":{"name":"Proceeding of Second Symposium on Turbulence and Shear Flow Phenomena","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123794302","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}
{"title":"CONTROL OF A MIXING LAYER FLOW BY FLUID INJECTION : DIRECT NUMERICAL SIMULATION RESULTS","authors":"S. Lardeau, E. Lamballais, J. Bonnet","doi":"10.1615/tsfp2.1140","DOIUrl":"https://doi.org/10.1615/tsfp2.1140","url":null,"abstract":"","PeriodicalId":438618,"journal":{"name":"Proceeding of Second Symposium on Turbulence and Shear Flow Phenomena","volume":"89 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131275692","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 : 1900-01-01DOI: 10.1088/1468-5248/3/1/010
Y. Hagiwara, T. Imamura, Atsushi Taki
Direct numerical simulation and experiment have been conducted for turbulent water flow around a waving film with polysaccharide in order to examine the modification of turbulence by the exudation of the polysaccharide. The cluster models of beads, springs and dashpots are introduced near the film as representative of the entangled biopolymers. Sinusoidal waving of the film, whose amplitude is mainly changed by time-varying pressure difference between two surfaces of the film, is assumed. An unsteady generalized curvilinear coordinate is used for expressing the waving with solid walls. Three types of film are examined: a flat film, a flexible film and a more flexible film. The flexibility is obtained by changing the parameter for the equation of film curvature. The computational results show that the population and size of streamwise vortices increase with the film flexibility and that the population and the core size of the vortices decrease near the surfaces due to the cluster models, which leads to a d...
{"title":"THE MODIFICATION OF COHERENT STRUCTURE ALONG A WAVING FILM BY POLYMER EXUDATION IN TURBULENT WATER FLOW","authors":"Y. Hagiwara, T. Imamura, Atsushi Taki","doi":"10.1088/1468-5248/3/1/010","DOIUrl":"https://doi.org/10.1088/1468-5248/3/1/010","url":null,"abstract":"Direct numerical simulation and experiment have been conducted for turbulent water flow around a waving film with polysaccharide in order to examine the modification of turbulence by the exudation of the polysaccharide. The cluster models of beads, springs and dashpots are introduced near the film as representative of the entangled biopolymers. Sinusoidal waving of the film, whose amplitude is mainly changed by time-varying pressure difference between two surfaces of the film, is assumed. An unsteady generalized curvilinear coordinate is used for expressing the waving with solid walls. Three types of film are examined: a flat film, a flexible film and a more flexible film. The flexibility is obtained by changing the parameter for the equation of film curvature. The computational results show that the population and size of streamwise vortices increase with the film flexibility and that the population and the core size of the vortices decrease near the surfaces due to the cluster models, which leads to a d...","PeriodicalId":438618,"journal":{"name":"Proceeding of Second Symposium on Turbulence and Shear Flow Phenomena","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131600934","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}
{"title":"BY-PASS TRANSITION EXPERIMENTAL STUDY WITH A CONTROL OF OUTER STREAM TURBULENCE SCALES","authors":"P. Jonáš, O. Mazur, V. Uruba","doi":"10.1615/tsfp2.820","DOIUrl":"https://doi.org/10.1615/tsfp2.820","url":null,"abstract":"","PeriodicalId":438618,"journal":{"name":"Proceeding of Second Symposium on Turbulence and Shear Flow Phenomena","volume":"46 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126412149","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}
{"title":"MULTIPOINT MEASUREMENT OF WALL PRESSURE FLUCTUATIONS IN A SEPARATED AND REATTACHING FLOW OVER A BACKWARD-FACING STEP","authors":"In-Won Lee, H. Sung","doi":"10.1615/tsfp2.2320","DOIUrl":"https://doi.org/10.1615/tsfp2.2320","url":null,"abstract":"","PeriodicalId":438618,"journal":{"name":"Proceeding of Second Symposium on Turbulence and Shear Flow Phenomena","volume":"45 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128212084","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}
{"title":"JET MIXING OF CRYOGEN AND WATER","authors":"Jan Dahlsveen, R. Kristoffersen, L. Saetran","doi":"10.1615/tsfp2.1290","DOIUrl":"https://doi.org/10.1615/tsfp2.1290","url":null,"abstract":"","PeriodicalId":438618,"journal":{"name":"Proceeding of Second Symposium on Turbulence and Shear Flow Phenomena","volume":"46 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128215417","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}
{"title":"LARGE EDDY SIMULATIONS OF NON-EQUILIBRIUM PULSED TURBULENT FLOWS USING TRANSPORT EQUATIONS SUBGRID SCALE MODEL","authors":"A. Dejoan, R. Schiestel","doi":"10.1615/tsfp2.1310","DOIUrl":"https://doi.org/10.1615/tsfp2.1310","url":null,"abstract":"","PeriodicalId":438618,"journal":{"name":"Proceeding of Second Symposium on Turbulence and Shear Flow Phenomena","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130514451","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}
Yohei K. Sato, A. Paris, Tomohiko Tanaka, K. Hishida
{"title":"EVOLUTION OF SUBGRID SCALE BY PARTICLES IN A TURBULENT CHANNEL FLOW OBTAINED FROM LAGRANGIAN MEASUREMENTS","authors":"Yohei K. Sato, A. Paris, Tomohiko Tanaka, K. Hishida","doi":"10.1615/tsfp2.490","DOIUrl":"https://doi.org/10.1615/tsfp2.490","url":null,"abstract":"","PeriodicalId":438618,"journal":{"name":"Proceeding of Second Symposium on Turbulence and Shear Flow Phenomena","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115067324","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}
{"title":"ON THE EFFECT OF FINITE REYNOLDS NUMBER AND INITIAL CONDITIONS ON THE AXISYMMETRIC WAKE","authors":"P. B. Johansson, W. K. George","doi":"10.1615/tsfp2.540","DOIUrl":"https://doi.org/10.1615/tsfp2.540","url":null,"abstract":"","PeriodicalId":438618,"journal":{"name":"Proceeding of Second Symposium on Turbulence and Shear Flow Phenomena","volume":"110 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131214518","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}
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