By Cedrick Ansorge
This thesis provides a examine of robust stratification and turbulence cave in within the planetary boundary layer, establishing a brand new street during this box. it's the first paintings to check all regimes of stratified turbulence in a unified simulation framework with out a holiday within the paradigms for illustration of turbulence.
To date, advances in our figuring out and the parameterization of turbulence within the solid boundary layer were hampered by means of problems simulating the strongly stratified regime, and the research has basically been in line with box measurements. The content material provided right here adjustments that paradigm by way of demonstrating the power of direct numerical simulation to deal with this challenge, and by way of doing with the intention to eliminate the uncertainty of turbulence versions from the research. utilizing a stably stratified Ekman layer as a simplified actual version of the solid boundary layer, the 3 stratification regimes saw in nature— weakly, intermediately and strongly stratified—are reproduced, and the knowledge is hence used to respond to key, long-standing questions.
The major a part of the booklet is geared up in 3 sections, particularly a complete creation, numerics, and physics. The thesis ends with a transparent and concise end that distills particular implications for the examine of the sturdy boundary layer. This constitution emphasizes the actual effects, yet even as supplies relevance to the technical facets of numerical schemes and post-processing instruments. the choice of the correct literature through the advent, and its use alongside the paintings safely combines literature from examine groups: fluid dynamics, and boundary-layer meteorology.
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Additional info for Analyses of Turbulence in the Neutrally and Stably Stratified Planetary Boundary Layer (Springer Theses)
Analyses of Turbulence in the Neutrally and Stably Stratified Planetary Boundary Layer (Springer Theses) by Cedrick Ansorge