Proceeding of Second Symposium on Turbulence and Shear Flow Phenomena最新文献

MODELING OF TURBULENT MELT CONVECTION DURING CZOCHRALSKI BULK CRYSTAL GROWTH chzochralski块状晶体生长过程中熔体湍流对流的模拟

Proceeding of Second Symposium on Turbulence and Shear Flow Phenomena Pub Date : 2011-01-24 DOI: 10.1088/1468-5248/3/1/013

V. Kalaev, A. Zhmakin, E. Smirnov

引用次数: 8

THE COMPUTATION OF FLOW AND HEAT TRANSFER THROUGH SQUARE-ENDED U-BENDS, USING LOW-REYNOLDS-NUMBER MODELS 用低雷诺数模型计算方形u型弯头的流动和传热

Proceeding of Second Symposium on Turbulence and Shear Flow Phenomena Pub Date : 2004-04-01 DOI: 10.1108/09615530410517977

K. Nikas, H. Iacovides

{"title":"THE COMPUTATION OF FLOW AND HEAT TRANSFER THROUGH SQUARE-ENDED U-BENDS, USING LOW-REYNOLDS-NUMBER MODELS","authors":"K. Nikas, H. Iacovides","doi":"10.1108/09615530410517977","DOIUrl":"https://doi.org/10.1108/09615530410517977","url":null,"abstract":"This study is concerned with the computation of turbulent flow and heat transfer in U‐bends of strong curvature. Following the earlier studies within the authors' group on flows through round‐ended U‐bends, here attention is turned to flows through square‐ended U‐bends. Flows at two Reynolds numbers have been computed, one at 100,000 and the other at 36,000. In the heat transfer analysis, the Prandtl number was either 0.72 (air) or, in a further departure from our earlier studies, 5.9 (water). The turbulence modelling approaches examined, include a two‐layer and a low‐Re k‐e model, a two‐layer and a low‐Re version of the basic differential stress model (DSM) and a more recently developed, realisable version of the differential stress model that is free of wall‐parameters. For the low‐Re effective viscosity model (EVM) and DSMs, an alternative, recently proposed length‐scale correction term, independent of wall distance has also been tested. Even the simplest model employed – two‐layer EVM – reproduces the mean flow development with reasonable accuracy, suggesting that the mean flow development is mainly influenced by mean pressure rather than the turbulence field. The heat transfer parameters, on the other hand, show that only the low‐Re DSMs produce reliable Nusselt number predictions for both Prandtl numbers examined.","PeriodicalId":438618,"journal":{"name":"Proceeding of Second Symposium on Turbulence and Shear Flow Phenomena","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129006742","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}

引用次数: 16

RELATIONSHIP BETWEEN WALL PRESSURE FLUCTUATIONS AND STREAMWISE VORTICITY IN A TURBULENT BOUNDARY LAYER 紊流边界层壁面压力波动与流向涡度的关系

Proceeding of Second Symposium on Turbulence and Shear Flow Phenomena Pub Date : 2002-01-17 DOI: 10.1063/1.1429964

Joongnyon Kim, Jung‐Il Choi, H. Sung

引用次数: 46

REYNOLDS-NUMBER DEPENDENCE OF STREAMWISE VELOCITY FLUCTUATIONS IN TURBULENT PIPE FLOW 紊流管道流动中沿流速度波动的雷诺数依赖性

Proceeding of Second Symposium on Turbulence and Shear Flow Phenomena Pub Date : 2002-01-14 DOI: 10.2514/6.2002-574

J. Morrison, W. Jiang, B. McKeon, A. Smits

{"title":"REYNOLDS-NUMBER DEPENDENCE OF STREAMWISE VELOCITY FLUCTUATIONS IN TURBULENT PIPE FLOW","authors":"J. Morrison, W. Jiang, B. McKeon, A. Smits","doi":"10.2514/6.2002-574","DOIUrl":"https://doi.org/10.2514/6.2002-574","url":null,"abstract":"Statistics of the streamwise velocity component in fully-developed pipe flow are examined for Reynolds numbers in the range 5.5 x 10^4 < Re_D < 5.7 x 10^6. The second moment exhibits two maxima: one in the viscous sublayer is Reynolds-number dependent while the other, near the lower edge of the log region, is also Reynolds-number dependent and follows roughly the peak in Reynolds shear stress. The behaviour of both peaks is consistent with the concept of inactive motion which increases with increasing Reynolds number and decreasing distance from the wall. No simple scaling is apparent, and in particular, so-called \"mixed\" scaling is no better than wall scaling in the viscous sublayer and is actually worse than wall scaling in the outer region. The second moment is compared with empirical and theoretical scaling laws \u0000and some anomalies are apparent. The scaling of spectra using y, R and u_τ is examined. It appears that even at the highest Reynolds number, they exhibit \u0000incomplete similarity only: while spectra do collapse with either inner or outer scales for limited ranges of wave number, these ranges do not overlap. Thus similarity may not be described as complete and any apparent k_1^(-1) range does not attract any special significance and does not involve universal constants. It is suggested that this is because of the influence of inactive motion. Spectra also show the presence of very long structures close to the wall.","PeriodicalId":438618,"journal":{"name":"Proceeding of Second Symposium on Turbulence and Shear Flow Phenomena","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-01-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125073247","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}

引用次数: 9

SPATIAL DNS OF THE FLOW TRANSITION OF A RECTANGULAR BUOYANT REACTING FREE-JET 矩形浮力反应自由射流流动转变的空间DNS

Proceeding of Second Symposium on Turbulence and Shear Flow Phenomena Pub Date : 2001-10-22 DOI: 10.1088/1468-5248/2/1/015

X. Jiang, K. Luo

引用次数: 11

THE BEHAVIOR OF CRYOGENIC SHEAR LAYERS UNDER SUPERCRITICAL CONDITIONS 超临界条件下低温剪切层的行为

Proceeding of Second Symposium on Turbulence and Shear Flow Phenomena Pub Date : 2001-06-29 DOI: 10.21236/ada409838

B. Chehroudi, R. Cohn, D. Talley

引用次数: 1

NUMERICAL SIMULATIONS OF THE LAGRANGIAN AVERAGED NAVIER-STOKES (LANS-α) EQUATIONS 拉格朗日平均navier-stokes (lans -α)方程的数值模拟

Proceeding of Second Symposium on Turbulence and Shear Flow Phenomena Pub Date : 2001-06-11 DOI: 10.2514/6.2001-2645

K. Mohseni, S. Shkoller, B. Kosović, J. Marsden

引用次数: 14

ADVANCED TURBULENCE MODELLING OF THE FLOW IN A GENERIC WING-BODY JUNCTION 一般翼身结合部流动的高级湍流模型

Proceeding of Second Symposium on Turbulence and Shear Flow Phenomena Pub Date : 2001-06-01 DOI: 10.1615/tsfp2.330

M. Leschziner, D. Apsley

引用次数: 4

COMPARING CVS AND LES FILTERING FOR 3D HOMOGENEOUS TURBULENCE 三维均匀湍流的CVS滤波与les滤波的比较

Proceeding of Second Symposium on Turbulence and Shear Flow Phenomena Pub Date : 2000-11-01 DOI: 10.1615/tsfp2.1020

M. Farge, K. Schneider, G. Pellegrino, A. Wray

引用次数: 0

H∞ CONTROL OF LINEAR GLOBAL INSTABILITY IN MODELS OF NON-PARALLEL WAKES 非平行尾迹模型线性全局不稳定性的H∞控制

Proceeding of Second Symposium on Turbulence and Shear Flow Phenomena Pub Date : 1900-01-01 DOI: 10.1615/tsfp2.1150

E. Lauga, T. Bewley

引用次数: 3