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This book presents recent progress in the application of RANS turbulence models based on the Reynolds stress transport equations. A variety of models has been implemented by different groups into different flow solvers and applied to external as well as to turbomachinery flows. Comparisons between the models allow an assessment of their performance in different flow conditions. The results demonstrate the general applicability of differential Reynolds stress models to separating flows in industrial aerodynamics.

Engineering. --- Engineering Fluid Dynamics. --- Fluid- and Aerodynamics. --- Hydraulic engineering. --- Ingénierie --- Technologie hydraulique --- Aerodynamics -- Mathematical models. --- Reynolds stress -- Mathematical models. --- Civil & Environmental Engineering --- Engineering & Applied Sciences --- Civil Engineering --- Aerodynamics --- Reynolds stress --- Mathematical models. --- Apparent stress (Meteorology) --- Eddy stress (Meteorology) --- Stress, Reynolds --- Turbulent shear stress (Meteorology) --- Virtual stress (Meteorology) --- Fluids. --- Fluid mechanics. --- Dynamic meteorology --- Eddies --- Engineering, Hydraulic --- Engineering --- Fluid mechanics --- Hydraulics --- Shore protection --- Mechanics --- Physics --- Hydrostatics --- Permeability --- Hydromechanics --- Continuum mechanics

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This book gathers the proceedings of the Seventh Symposium on Hybrid RANS-LES Methods, which was held on September 17-19 in Berlin, Germany. The different chapters, written by leading experts, reports on the most recent developments in flow physics modelling, and gives a special emphasis to industrially relevant applications of hybrid RANS-LES methods and other turbulence-resolving modelling approaches. The book addresses academic researchers, graduate students, industrial engineers, as well as industrial R&D managers and consultants dealing with turbulence modelling, simulation and measurement, and with multidisciplinary applications of computational fluid dynamics (CFD), such as flow control, aero-acoustics, aero-elasticity and CFD-based multidisciplinary optimization. It discusses in particular advanced hybrid RANS-LES methods. Further topics include wall-modelled Large Eddy Simulation (WMLES) methods, embedded LES, Lattice-Bolzman methods and turbulence-resolving applications and a comparison of the LES methods with both hybrid RANS-LES and URANS methods. Overall, the book provides readers with a snapshot on the state-of-the-art in CFD and turbulence modelling, with a special focus to hybrid RANS-LES methods and their industrial applications. .

Fluid mechanics. --- Physics. --- Fluids. --- Engineering Fluid Dynamics. --- Numerical and Computational Physics, Simulation. --- Fluid- and Aerodynamics. --- Hydraulics --- Mechanics --- Physics --- Hydrostatics --- Permeability --- Natural philosophy --- Philosophy, Natural --- Physical sciences --- Dynamics --- Hydromechanics --- Continuum mechanics --- Turbulence --- Eddies --- Reynolds stress --- Mathematical models --- Apparent stress (Meteorology) --- Eddy stress (Meteorology) --- Stress, Reynolds --- Turbulent shear stress (Meteorology) --- Virtual stress (Meteorology) --- Dynamic meteorology --- Fluid dynamics --- Water currents --- Whirlpools --- Mathematical physics. --- Continuum mechanics. --- Theoretical, Mathematical and Computational Physics. --- Continuum Mechanics. --- Mechanics of continua --- Elasticity --- Mechanics, Analytic --- Field theory (Physics) --- Physical mathematics --- Mathematics

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The present book contains contributions presented at the Third Symposium on Hybrid RANS-LES Methods, held in Gdansk, Poland, 10-12 June 2009, being a continuation of the first symposium taking place in Stockholm (Sweden, 2005) and the second in Corfu (Greece, 2007). The contributions to the Corfu symposium were published as “Advances in Hybrid RANS-LES Modelling” (NNFM, Vol. 97). At the Gdansk symposium, along with four invited keynotes, another 28 papers were presented addressing topics on Unsteady RANS, LES, Improved DES Methods, Hybrid RANS-LES Methods, DES vs. URANS and other Hybrid Methods, Modelling-related Numerical Issues and Industrial Applications. Additionally, a comprehensive summary of a round-table discussion on hybrid RANS-LES methods is presented. The present book reflects recent activities and new progress in the development and applications of DES and other hybrid RANS-LES modelling approaches to handle both industrial and fundamental flow problems.

Eddies -- Mathematical models -- Congresses. --- Reynolds stress -- Mathematical models -- Congresses. --- Turbulence -- Mathematical models -- Congresses. --- Engineering & Applied Sciences --- Civil & Environmental Engineering --- Civil Engineering --- Engineering - General --- Engineering --- Mechanics, Applied --- Hydraulic engineering --- Construction --- Engineering. --- Continuum physics. --- Fluids. --- Computational intelligence. --- Mechanics. --- Mechanics, Applied. --- Fluid mechanics. --- Engineering Fluid Dynamics. --- Classical Continuum Physics. --- Engineering, general. --- Theoretical and Applied Mechanics. --- Fluid- and Aerodynamics. --- Computational Intelligence. --- Hydromechanics --- Continuum mechanics --- Applied mechanics --- Engineering, Mechanical --- Engineering mathematics --- Classical mechanics --- Newtonian mechanics --- Physics --- Dynamics --- Quantum theory --- Intelligence, Computational --- Artificial intelligence --- Soft computing --- Hydraulics --- Mechanics --- Hydrostatics --- Permeability --- Classical field theory --- Continuum physics --- Industrial arts --- Technology --- Hydraulic engineering. --- Mechanics, applied. --- Classical and Continuum Physics. --- Engineering, Hydraulic --- Fluid mechanics --- Shore protection

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This volume contains papers contributed to the Second Symposium on Hybrid RANS-LES Methods, held in Corfu, Greece, 17-18 June 2007. All the papers have undergone further review and revision after the symposium, which has covered a number of relevant topics in the field. These include Unsteady RANS and LES, Improved DES Methods, Hybrid RANS-LES Methods, Embedded LES, DES-related Numerical Issues, Performance of the New SAS Model, as well as Industrial Applications of DES. Papers represent a leading part of current studies and achievements on the fundamentals of hybrid RANS-LES methods in general, as well as on their applications to industrial flow problems. Among the contributed papers, three invited keynote papers by B. Geurts, U. Piomelli and P. Sagaut, are presented together with an overview paper by P. Spalart.

Turbulence --- Eddies --- Reynolds stress --- Mathematical models --- Congresses --- Modèles mathématiques --- Congrès --- Turbulence. --- Civil & Environmental Engineering --- Engineering & Applied Sciences --- Civil Engineering --- Apparent stress (Meteorology) --- Eddy stress (Meteorology) --- Stress, Reynolds --- Turbulent shear stress (Meteorology) --- Virtual stress (Meteorology) --- Engineering. --- Computer simulation. --- Continuum physics. --- Fluids. --- Computational intelligence. --- Mechanics. --- Mechanics, Applied. --- Fluid mechanics. --- Engineering Fluid Dynamics. --- Simulation and Modeling. --- Classical Continuum Physics. --- Theoretical and Applied Mechanics. --- Fluid- and Aerodynamics. --- Computational Intelligence. --- Hydromechanics --- Continuum mechanics --- Applied mechanics --- Engineering, Mechanical --- Engineering mathematics --- Classical mechanics --- Newtonian mechanics --- Physics --- Dynamics --- Quantum theory --- Intelligence, Computational --- Artificial intelligence --- Soft computing --- Hydraulics --- Mechanics --- Hydrostatics --- Permeability --- Classical field theory --- Continuum physics --- Computer modeling --- Computer models --- Modeling, Computer --- Models, Computer --- Simulation, Computer --- Electromechanical analogies --- Simulation methods --- Model-integrated computing --- Construction --- Industrial arts --- Technology --- Dynamic meteorology --- Fluid dynamics --- Water currents --- Whirlpools --- Hydraulic engineering. --- Mechanics, applied. --- Classical and Continuum Physics. --- Engineering, Hydraulic --- Engineering --- Fluid mechanics --- Shore protection

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Geophysical, environmental, and urban fluid flows (i.e., flows developing in oceans, seas, estuaries, rivers, aquifers, reservoirs, etc.) exhibit a wide range of reactive and transport processes. Therefore, identifying key phenomena, understanding their relative importance, and establishing causal relationships between them is no trivial task. Analysis of primitive variables (e.g., velocity components, pressure, temperature, concentration) is not always conducive to the most fruitful interpretations. Examining auxiliary variables introduced for diagnostic purposes is an option worth considering. In this respect, tracer and timescale methods are proving to be very effective. Such methods can help address questions such as, "where does a fluid-born dissolved or particulate substance come from and where will it go?" or, "how fast are the transport and reaction phenomena controlling the appearance and disappearance such substances?" These issues have been dealt with since the 19th century, essentially by means of ad hoc approaches. However, over the past three decades, methods resting on solid theoretical foundations have been developed, which permit the evaluation of tracer concentrations and diagnostic timescales (age, residence/exposure time, etc.) across space and time and using numerical models and field data. This book comprises research and review articles, introducing state-of-the-art diagnostic theories and their applications to domains ranging from shallow human-made reservoirs to lakes, river networks, marine domains, and subsurface flows

residence time --- Three Gorges Reservoir --- tributary bay --- density current --- water level regulation --- marina --- water renewal --- transport timescales --- return-flow --- macro-tidal --- wind influence --- floating structures --- San Francisco Estuary --- Sacramento–San Joaquin Delta --- water age --- transport time scales --- hydrodynamic model --- tidal hydrodynamics --- stable isotopes --- reactive tracers --- tailor-made tracer design --- hydrogeological tracer test --- kinetics --- partitioning --- Mahakam Delta --- age --- exposure time --- return coefficient --- CART --- source water fingerprinting --- floodplain --- turbulence --- ADCP measurement --- wave bias --- Reynolds stress --- transport process --- passive tracers --- terrestrial dissolved substances --- Pearl River Estuary --- shallow lake --- meteorological influence --- sub-basins --- Delft3D --- partial differential equations --- boundary conditions --- geophysical and environmental fluid flows --- reactive transport --- interpretation methods --- diagnostic timescales --- age distribution function --- radionuclide --- tracer --- data collection --- antimony 125 (125Sb) --- tritium (3H) --- dispersion --- modeling --- English Channel --- North Sea --- Biscay Bay --- timescale --- transport --- hydrodynamic --- ecological --- biogeochemical --- coastal --- estuary --- flushing time --- shallow reservoir --- numerical modeling --- Lagrangian transport modelling --- coupled wave–ocean models --- ocean drifters --- wave-induced processes --- model skills --- n/a --- Sacramento-San Joaquin Delta --- coupled wave-ocean models