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Journal articles
Kolmogorov laws for stratified turbulence
Abstract : Following the Kolmogorov technique, an exact relation for a vector third-order moment J is derived for three-dimensional incompressible stably stratified turbulence under the Boussinesq approximation. In the limit of a small Brunt-Vaisala frequency, isotropy may be assumed which allows us to find a generalized 4/3-law. For strong stratification, we make the ansatz that J is directed along axisymmetric surfaces parameterized by a scaling law relating horizontal and vertical coordinates. An integration of the exact relation under this hypothesis leads to a generalized Kolmogorov law which depends on the intensity of anisotropy parameterized by a single coefficient. By using a scaling relation between large horizontal and vertical length scales we fix this coefficient and propose a unique law.
Cited literature [30 references]
https://hal-polytechnique.archives-ouvertes.fr/hal-00996508
Contributor : Denis Roura <>
Submitted on : Thursday, June 5, 2014 - 2:20:39 PM
Last modification on : Wednesday, September 16, 2020 - 4:44:12 PM
Long-term archiving on: : Friday, September 5, 2014 - 10:46:44 AM
Contributor : Denis Roura <>
Submitted on : Thursday, June 5, 2014 - 2:20:39 PM
Last modification on : Wednesday, September 16, 2020 - 4:44:12 PM
Long-term archiving on: : Friday, September 5, 2014 - 10:46:44 AM
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