Author: Wai-Ming ToPublisher:
ISBN:
Category :
Languages : en
Pages : 378
Book Description
Numerical Calculation of Turbulent Buoyant Flow
Author: Wai-Ming ToTurbulent Buoyant Jets and Plumes
Author: Wolfgang RodiPublisher: Elsevier
ISBN: 1483189872
Category : Technology & Engineering
Languages : en
Pages : 193
Book Description
The Science & Applications of Heat and Mass Transfer: Reports, Reviews, & Computer Programs, Volume 6: Turbulent Buoyant Jets and Plumes focuses on the formation, properties, characteristics, and reactions of turbulent jets and plumes. The selection first offers information on the mechanics of turbulent buoyant jets and plumes and turbulent buoyant jets in shallow fluid layers. Discussions focus on submerged buoyant jets into shallow fluid, horizontal surface or interface jets into shallow layers, fundamental considerations, and turbulent buoyant jets (forced plumes). The manuscript then examines a turbulence model for buoyant flows and its application to vertical buoyant jets, including mathematical model, calculation of vertical buoyant jets, and explanation of velocity and temperature spreading in pure jets and pure plumes. The publication is a dependable reference for scientists and readers interested in turbulent buoyant jets and plumes.
Physics Of Buoyant Flows: From Instabilities To Turbulence
Author: Mahendra Kumar VermaPublisher: World Scientific
ISBN: 9813237813
Category : Science
Languages : en
Pages : 352
Book Description
Gravity pervades the whole universe; hence buoyancy drives fluids everywhere including those in the atmospheres and interiors of planets and stars. Prime examples of such flows are mantle convection, atmospheric flows, solar convection, dynamo process, heat exchangers, airships and hot air balloons. In this book we present fundamentals and applications of thermal convection and stratified flows.Buoyancy brings in extremely rich phenomena including waves and instabilities, patterns, chaos, and turbulence. In this book we present these topics in a systematic manner. First we present a unified treatment of linear theory that yields waves and thermal instability for stably and unstably-stratified flows respectively. We extend this analysis to include rotation and magnetic field. We also describe nonlinear saturation and pattern formation in Rayleigh-Bénard convection.The second half of the book is dedicated to buoyancy-driven turbulence, both in stably-stratified flow and in thermal convection. We describe the spectral theory including energy flux and show that the thermally-driven turbulence is similar to hydrodynamic turbulence. We also describe large-scale quantities like Reynolds and Nusselt numbers, flow anisotropy, and the dynamics of flow structures, namely flow reversals. Thus, this book presents all the major aspects of the buoyancy-driven flows in a coherent manner that would appeal to advanced graduate students and researchers.
Analysis and Modeling of Buoyancy Generated Turbulence Using Numerical Data
Author: Publisher:
ISBN:
Category :
Languages : en
Pages : 40
Book Description
Rayleigh-Bernard convection offers a unique flow situation in which buoyancy-generated turbulence can be studied in isolation, free of the complicating influence of shear production of turbulence. The objective of this paper is to examine and model important aspects of buoyancy-generated turbulence using direct numerical simulation (DNS) data of Rayleigh-Bernard convection. In particular, we examine the pressure-strain and pressure temperature-gradient correlations, turbulent transport of Reynolds stress, and assumptions pertaining to algebraic modeling of thermal flux and Reynolds stress.
The Numerical Calculation of Buoyancy Driven Flows
Author: O. A. PlumbPublisher:
ISBN:
Category : Laminar flow
Languages : en
Pages : 308
Book Description
Numerical Simulation of Unsteady Flows and Transition to Turbulence
Author: O. PironneauPublisher: Cambridge University Press
ISBN: 9780521416184
Category : Mathematics
Languages : en
Pages : 536
Book Description
The workshop concentrated on the following turbulence test cases: T1 Boundary layer in an S-shaped duct; T2 Periodic array of cylinders in a channel; T3 Transition in a boundary layer under the influence of free-stream turbulence; T4 & T5: Axisymmetric confined jet flows.
Analysis and Modeling of Buoyancy Generated Turbulence Using Numerical Data
Author: Sharath S. GirimajiPublisher:
ISBN:
Category : Momentum transfer
Languages : en
Pages : 50
Book Description
Turbulent Flows
Author: G. BiswasPublisher: CRC Press
ISBN: 9780849310140
Category : Technology & Engineering
Languages : en
Pages : 478
Book Description
This book allows readers to tackle the challenges of turbulent flow problems with confidence. It covers the fundamentals of turbulence, various modeling approaches, and experimental studies. The fundamentals section includes isotropic turbulence and anistropic turbulence, turbulent flow dynamics, free shear layers, turbulent boundary layers and plumes. The modeling section focuses on topics such as eddy viscosity models, standard K-E Models, Direct Numerical Stimulation, Large Eddy Simulation, and their applications. The measurement of turbulent fluctuations experiments in isothermal and stratified turbulent flows are explored in the experimental methods section. Special topics include modeling of near wall turbulent flows, compressible turbulent flows, and more.
Turbulence Models and Their Application in Hydraulics
Author: Wolfgang RodiPublisher: Routledge
ISBN: 1351406574
Category : Technology & Engineering
Languages : en
Pages : 124
Book Description
This book provides an introduction to the subject of turbulence modelling in a form easy to understand for anybody with a basic background in fluid mechanics, and it summarizes the present state of the art. Individual models are described and examined for the merits and demerits which range from the simple Prandtl mixing length theory to complex second order closure schemes.
Author: Christian Seiter