C. Mengler, Christoph Heinrich, A. Sadiki, J. Janicka
{"title":"NUMERICAL PREDICTION OF MOMENTUM AND SCALAR FIELDS IN A JET IN CROSS FLOW: COMPARISON OF LES AND SECOND ORDER TURBULENCE CLOSURE CALCULATIONS","authors":"C. Mengler, Christoph Heinrich, A. Sadiki, J. Janicka","doi":"10.1615/tsfp2.1450","DOIUrl":"https://doi.org/10.1615/tsfp2.1450","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":"122011013","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 DRAG REDUCTION OF FUNCTIONAL FLUID FLOW IN RECTANGULAR CHANNEL - SPATIAL STRUCTURE AND RECOVERY PROCESS OF TURBULENCE INVESTIGATED BY PIV -","authors":"Y. Kawaguchi, Z. Feng, Pei Li","doi":"10.1615/tsfp2.1400","DOIUrl":"https://doi.org/10.1615/tsfp2.1400","url":null,"abstract":"","PeriodicalId":438618,"journal":{"name":"Proceeding of Second Symposium on Turbulence and Shear Flow Phenomena","volume":"36 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":"124284581","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}
Large Eddy Simulation (LES) and ReynoldsaveragedNavier-Stokes(RANS)calculationshave been used to predict the development, separation, reattachmentand downstreamrecovery of the flow over a smoothlycontouredramp. The statisticallytwo-dimensionalupstreamflow separatesalong the ramp surfaceand then reattaches downstreamon a flat section. A canonicalflatplate turbulent boundary layer at a momentum thicknessReynolds number1100, and having a boundarylayer thickness , is introduced four ramplengthsupstreamof theonsetof curvature. Subgrid-scale(SGS)stressesin theLES are closedusingthedynamiceddyviscositymodelof Germanoet al. (1991). RANS calculationsof the steady-statesolutionareperformedusingtwo leading models: Spalart-Allmaras(Spalart-Allmaras 1994) and (Durbin 1991). Mean flow predictionsobtainedusingall the modelsagreewell with theexperimentalmeasurements of Songet al. (2000). Boundarylayer detachment occursalong the curved section( ) with reattachmentat roughly . Theprimary turbulent shearstresssharplyincreasesin theseparated region andLES predictionsof theshearstressdevelopmentareaccurate.RANS estimationsof the shearstressarebelow thedatain theseparatedregion,thoughreasonablefurtherdownstream. INTRODUCTION AND OBJECTIVES Separatedboundary layers are a challenging subsetof flows that may be generallyclassified as ‘non-equilibrium’. Non-equilibriumboundary currentaddress:Centerfor Simulationof AdvancedRockets,Universityof Illinois, Urbana,Illinois 61801,USA layersarethe norm, ratherthanthe exception,in engineeringapplications.Theimportanceof additional lengthscalesto describingtheflow and/ora significantimbalancebetweenproductionanddissipationaretwo featureswhich characterizethese flows. An adverse pressuregradient boundary layer approachingseparationdevelops an inflection point, the height of which is an additional importantlengthscale.Turbulentstresses, for example,develop large peaksaroundthe inflection point andboundarylayerrecovery following reattachmentshouldbeexpectedto besensiti ve to this lengthscale. Theseandotherfeaturesof separatedflowssubstantiallychallengepredicti ve methods.The vast majority of engineeringpredictionsare obtained from solutionsof the Reynolds-averagedNavierStokes (RANS) equations.In flows not far from equilibrium, the boundaryconditionsthat define largescalestructuresremainnearlyunchangedand theleadingRANSmodelsaretypically adequate. In separatedflows, however, RANS models often yield mixed results (e.g., see Apsley and Leschziner1999),providing onerationalefor use of techniquessuch as Large Eddy Simulation (LES). In LES,thelarge,energy-containingscales of motion areresolved on the meshandonly the small, subgridscalesare modeled. LES predictionsarelesssensiti veto modelingerrorsthantheir RANS counterparts. This featureshouldbeanadvantagein predictionof flows far from thecalibration rangeof RANS modelsand in regimeswith multiple perturbations(e.g., in pressuregradient, streamlinecurvature,roughness, etc.). Assessment of s
{"title":"NUMERICAL INVESTIGATION OF THE SEPARATED FLOW OVER A SMOOTHLY CONTOURED RAMP","authors":"B. Wasistho, K. Squires","doi":"10.1615/tsfp2.2310","DOIUrl":"https://doi.org/10.1615/tsfp2.2310","url":null,"abstract":"Large Eddy Simulation (LES) and ReynoldsaveragedNavier-Stokes(RANS)calculationshave been used to predict the development, separation, reattachmentand downstreamrecovery of the flow over a smoothlycontouredramp. The statisticallytwo-dimensionalupstreamflow separatesalong the ramp surfaceand then reattaches downstreamon a flat section. A canonicalflatplate turbulent boundary layer at a momentum thicknessReynolds number1100, and having a boundarylayer thickness , is introduced four ramplengthsupstreamof theonsetof curvature. Subgrid-scale(SGS)stressesin theLES are closedusingthedynamiceddyviscositymodelof Germanoet al. (1991). RANS calculationsof the steady-statesolutionareperformedusingtwo leading models: Spalart-Allmaras(Spalart-Allmaras 1994) and (Durbin 1991). Mean flow predictionsobtainedusingall the modelsagreewell with theexperimentalmeasurements of Songet al. (2000). Boundarylayer detachment occursalong the curved section( ) with reattachmentat roughly . Theprimary turbulent shearstresssharplyincreasesin theseparated region andLES predictionsof theshearstressdevelopmentareaccurate.RANS estimationsof the shearstressarebelow thedatain theseparatedregion,thoughreasonablefurtherdownstream. INTRODUCTION AND OBJECTIVES Separatedboundary layers are a challenging subsetof flows that may be generallyclassified as ‘non-equilibrium’. Non-equilibriumboundary currentaddress:Centerfor Simulationof AdvancedRockets,Universityof Illinois, Urbana,Illinois 61801,USA layersarethe norm, ratherthanthe exception,in engineeringapplications.Theimportanceof additional lengthscalesto describingtheflow and/ora significantimbalancebetweenproductionanddissipationaretwo featureswhich characterizethese flows. An adverse pressuregradient boundary layer approachingseparationdevelops an inflection point, the height of which is an additional importantlengthscale.Turbulentstresses, for example,develop large peaksaroundthe inflection point andboundarylayerrecovery following reattachmentshouldbeexpectedto besensiti ve to this lengthscale. Theseandotherfeaturesof separatedflowssubstantiallychallengepredicti ve methods.The vast majority of engineeringpredictionsare obtained from solutionsof the Reynolds-averagedNavierStokes (RANS) equations.In flows not far from equilibrium, the boundaryconditionsthat define largescalestructuresremainnearlyunchangedand theleadingRANSmodelsaretypically adequate. In separatedflows, however, RANS models often yield mixed results (e.g., see Apsley and Leschziner1999),providing onerationalefor use of techniquessuch as Large Eddy Simulation (LES). In LES,thelarge,energy-containingscales of motion areresolved on the meshandonly the small, subgridscalesare modeled. LES predictionsarelesssensiti veto modelingerrorsthantheir RANS counterparts. This featureshouldbeanadvantagein predictionof flows far from thecalibration rangeof RANS modelsand in regimeswith multiple perturbations(e.g., in pressuregradient, streamlinecurvature,roughness, etc.). Assessment of s","PeriodicalId":438618,"journal":{"name":"Proceeding of Second Symposium on Turbulence and Shear Flow Phenomena","volume":"17 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":"125311244","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":"SHOCK MOTION AND STATE OF TURBULENCE IN A PERTURBED FLOW OVER A SPHERE, AT SUPERSONIC SPEED","authors":"Jean-Francis Debieve, J. Dussauge","doi":"10.1615/tsfp2.1300","DOIUrl":"https://doi.org/10.1615/tsfp2.1300","url":null,"abstract":"","PeriodicalId":438618,"journal":{"name":"Proceeding of Second Symposium on Turbulence and Shear Flow Phenomena","volume":"62 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":"126250696","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 SIMULATION OF A COMPRESSIBLE MIXING LAYER WITH A TIME SELF-ADAPTIVE MULTILEVEL METHOD","authors":"M. Terracol, P. Sagaut, C. Basdevant","doi":"10.1615/tsfp2.720","DOIUrl":"https://doi.org/10.1615/tsfp2.720","url":null,"abstract":"","PeriodicalId":438618,"journal":{"name":"Proceeding of Second Symposium on Turbulence and Shear Flow Phenomena","volume":"9 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":"126425075","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":"TURBULENT STRUCTURES IN OPEN-CHANNEL FLOWS WITH STRONG UNSTEADINESS","authors":"I. Nezu, K. Onitsuka","doi":"10.1615/tsfp2.570","DOIUrl":"https://doi.org/10.1615/tsfp2.570","url":null,"abstract":"","PeriodicalId":438618,"journal":{"name":"Proceeding of Second Symposium on Turbulence and Shear Flow Phenomena","volume":"38 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":"126473829","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":"A SPATIAL STRUCTURE OF A FLOW OF AXISYMMETRIC SUDDEN EXPANSION","authors":"N. Furuichi, Yasushi Takeda, M. Kumada","doi":"10.1615/tsfp2.2330","DOIUrl":"https://doi.org/10.1615/tsfp2.2330","url":null,"abstract":"","PeriodicalId":438618,"journal":{"name":"Proceeding of Second Symposium on Turbulence and Shear Flow Phenomena","volume":"135 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":"129995988","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}
S. Poroseva, S. Kassinos, C. A. Langer, W. Reynolds
{"title":"SIMULATION OF A TURBULENT FLOW IN A ROTATING PIPE USING THE STRUCTURE-BASED MODEL","authors":"S. Poroseva, S. Kassinos, C. A. Langer, W. Reynolds","doi":"10.1615/tsfp2.1880","DOIUrl":"https://doi.org/10.1615/tsfp2.1880","url":null,"abstract":"","PeriodicalId":438618,"journal":{"name":"Proceeding of Second Symposium on Turbulence and Shear Flow Phenomena","volume":"9 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":"129569029","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":"TURBULENCE EFFECT ON THE STABILISATION REGIMES OF NON-PREMIXED FLAMES","authors":"I. Esquiva-Dano, D. Escudié","doi":"10.1615/tsfp2.210","DOIUrl":"https://doi.org/10.1615/tsfp2.210","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":"129886753","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":"OSCILLATORY, CHAOTIC AND TURBULENT THERMOCAPILLARY CONVECTIONS IN A HALF-ZONE LIQUID BRIDGE","authors":"H. Kawamura, I. Ueno, Shiho Tanaka, D. Nagano","doi":"10.1615/tsfp2.2260","DOIUrl":"https://doi.org/10.1615/tsfp2.2260","url":null,"abstract":"","PeriodicalId":438618,"journal":{"name":"Proceeding of Second Symposium on Turbulence and Shear Flow Phenomena","volume":"13 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":"121505679","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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