Mixing in Stably Stratified Turbulent Taylor-Couette Flow

Mixing in Stably Stratified Turbulent Taylor-Couette Flow PDF Author: Rosalind Leigh Frances Oglethorpe
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ISBN:
Category :
Languages : en
Pages :

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Mixing in Stably Stratified Turbulent Taylor-Couette Flow

Mixing in Stably Stratified Turbulent Taylor-Couette Flow PDF Author: Rosalind Leigh Frances Oglethorpe
Publisher:
ISBN:
Category :
Languages : en
Pages :

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Instability and Mixing in a Turbulent Stratified Taylor-Couette Flow

Instability and Mixing in a Turbulent Stratified Taylor-Couette Flow PDF Author: Kanwar Nain Singh
Publisher:
ISBN:
Category :
Languages : en
Pages :

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Turbulent Mixing in Stably Stratified Flows

Turbulent Mixing in Stably Stratified Flows PDF Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 101

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High resolution direct numerical simulations are used to investigate the dynamics of turbulence in flows subject to strong stable stratification, which are common in natural settings. Results are presented for two categories of simulations, uniform and non-uniform density stratification. For all simulated flows, the density stratification was held constant in time, and there was no ambient shear. Flows with uniform density stratification are first analyzed to help provide clear insight to physical processes, followed by flows with non-uniform density stratification which better represent the stratification occurring in nature.

Turbulent Mixing in Stably-stratified Fluids Subjected to Zero-mean Shear

Turbulent Mixing in Stably-stratified Fluids Subjected to Zero-mean Shear PDF Author: Imad Awni Hannoun
Publisher:
ISBN:
Category : Electronic dissertations
Languages : en
Pages : 310

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Mixing and Dispersion in Stably Stratified Flows

Mixing and Dispersion in Stably Stratified Flows PDF Author: P. A. Davies
Publisher: Oxford University Press
ISBN: 9780198500155
Category : Diffusion in hydrology
Languages : en
Pages : 668

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Stratified flows are important in determining how various atmospheric and environmental processes occur. The book investigates these processes and focuses on the methods by which pollutants are mixed and dispersed in natural and industrial environments.

Underlying Physics of Mixing Efficiency of Stably Stratified Turbulence

Underlying Physics of Mixing Efficiency of Stably Stratified Turbulence PDF Author: Young Ro Yi
Publisher:
ISBN:
Category :
Languages : en
Pages : 0

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Global and regional ocean simulations rely on eddy viscosities and diffusivities to represent the unresolved turbulent mixing of momentum and scalars. The simulated flow and the transport of quantities such as heat and carbon are quite sensitive to how the turbulence is modeled. Particularly, the eddy diffusivity model of Osborn (1980) is widely used to represent the vertical buoyancy flux, which requires accurate knowledge of the mixing coefficient--defined as the ratio of the dissipation rates of available turbulent potential energy (TPE) and turbulent kinetic energy (TKE). While a constant value of 0.2 is often prescribed for the mixing coefficient, there is significant evidence for parameterizing it as a function of dimensionless numbers that characterize the state of the turbulence. Using direct numerical simulations, we studied stably stratified turbulence under three different sets of forcing: (i) linear axisymmetric forcing; (ii) three types of shear forcing; and (iii) combined momentum and buoyancy forcing. By analyzing the budgets of the normal Reynolds stresses and the vertical buoyancy flux, we observed that terms involving the pressure field (i.e., pressure-strain correlations and pressure scrambling) exhibited significant changes as the turbulent mixing became more efficient. Each of these three sets of flows exhibited quantitative physical differences in their mixing characteristics. Our findings suggested the need for improved models of the turbulent mixing in stratified flows, which we achieved by revising existing scaling relationships for the mixing coefficient and exploring anisotropic model forms for the turbulent momentum and scalar fluxes.

Turbulent Mixing in Stably Stratified Shear Flows

Turbulent Mixing in Stably Stratified Shear Flows PDF Author: Ulrich Schumann
Publisher:
ISBN:
Category :
Languages : en
Pages :

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Modeling and Simulation of Turbulent Mixing and Reaction

Modeling and Simulation of Turbulent Mixing and Reaction PDF Author: Daniel Livescu
Publisher: Springer Nature
ISBN: 9811526435
Category : Technology & Engineering
Languages : en
Pages : 273

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This book highlights recent research advances in the area of turbulent flows from both industry and academia for applications in the area of Aerospace and Mechanical engineering. Contributions include modeling, simulations and experiments meant for researchers, professionals and students in the area.

Studies on Turbulent Mixing in Stably Stratified Fluids

Studies on Turbulent Mixing in Stably Stratified Fluids PDF Author: M. Harindra Joseph S. Fernando
Publisher:
ISBN:
Category :
Languages : en
Pages : 232

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Numerical Experiments in Homogeneous Turbulence

Numerical Experiments in Homogeneous Turbulence PDF Author: Robert Sugden Rogallo
Publisher:
ISBN:
Category : Turbulence
Languages : en
Pages : 98

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