2D and 3D Properties of Stably Stratified Turbulence

Author:

Kimura Yoshifumi1ORCID,Sullivan Peter P.2ORCID

Affiliation:

1. Graduate School of Mathematics, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8602, Japan

2. Meoscale and Microscale Meteorology, National Center for Atmospheric Research, Boulder, CO 80301, USA

Abstract

Through interactions between the modes of “waves” and “vortices”, stably stratified turbulence exhibits characteristic features both in 2D and 3D. Using DNS of the Navier–Stokes equations coupled to an equation for temperature (the Bousinessq system), we investigate dynamical properties of stably stratified turbulence. After reviewing the importance of three characteristic length scales and their relations in stably stratified turbulence, we present numerical results showing how structures and spectra develop with the growth of the length scales. It is demonstrated that the temperature fluctuations make sharp fronts vertically which result in non-symmetric PDFs of the vertical derivative ∂zθ.

Funder

JSPS (Japan Society for the Promotion of Science) KAKENHI

Publisher

MDPI AG

Subject

Atmospheric Science,Environmental Science (miscellaneous)

Reference30 articles.

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