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ThermodynamicsDynamics Coupling in Weakly Compressible Turbulent Stratified Fluids
Author
Source
Issue
Vol. 2012, Issue 2012 (31 Dec. 2012), pp.1-15, 15 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2012-03-08
Country of Publication
Egypt
No. of Pages
15
Main Subjects
Abstract EN
In traditional and geophysical fluid dynamics, it is common to describe stratified turbulent fluid flows with low Mach number and small relative density variations by means of the incompressible Boussinesq approximation.
Although such an approximation is often interpreted as decoupling the thermodynamics from the dynamics, this paper reviews recent results and derive new ones that show that the reality is actually more subtle and complex when diabatic effects and a nonlinear equation of state are retained.
Such an analysis reveals indeed: (1) that the compressible work of expansion/contraction remains of comparable importance as the mechanical energy conversions in contrast to what is usually assumed; (2) in a Boussinesq fluid, compressible effects occur in the guise of changes in gravitational potential energy due to density changes.
This makes it possible to construct a fully consistent description of the thermodynamics of incompressible fluids for an arbitrary nonlinear equation of state; (3) rigorous methods based on using the available potential energy and potential enthalpy budgets can be used to quantify the work of expansion/contraction B in steady and transient flows, which reveals that B is predominantly controlled by molecular diffusive effects, and act as a significant sink of kinetic energy.
American Psychological Association (APA)
Tailleux, Rémi. 2012. ThermodynamicsDynamics Coupling in Weakly Compressible Turbulent Stratified Fluids. ISRN Thermodynamics،Vol. 2012, no. 2012, pp.1-15.
https://search.emarefa.net/detail/BIM-484874
Modern Language Association (MLA)
Tailleux, Rémi. ThermodynamicsDynamics Coupling in Weakly Compressible Turbulent Stratified Fluids. ISRN Thermodynamics No. 2012 (2012), pp.1-15.
https://search.emarefa.net/detail/BIM-484874
American Medical Association (AMA)
Tailleux, Rémi. ThermodynamicsDynamics Coupling in Weakly Compressible Turbulent Stratified Fluids. ISRN Thermodynamics. 2012. Vol. 2012, no. 2012, pp.1-15.
https://search.emarefa.net/detail/BIM-484874
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-484874