By Cedrick Ansorge
This thesis provides a examine of sturdy stratification and turbulence cave in within the planetary boundary layer, commencing 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 realizing and the parameterization of turbulence within the sturdy boundary layer were hampered through problems simulating the strongly stratified regime, and the research has basically been in accordance with box measurements. The content material provided right here adjustments that paradigm via demonstrating the facility of direct numerical simulation to handle this challenge, and by way of doing in an effort to eliminate the uncertainty of turbulence versions from the research. utilizing a stably stratified Ekman layer as a simplified actual version of the reliable boundary layer, the 3 stratification regimes saw in nature— weakly, intermediately and strongly stratified—are reproduced, and the information is accordingly used to reply to key, long-standing questions.
The major a part of the ebook is equipped in 3 sections, particularly a finished advent, numerics, and physics. The thesis ends with a transparent and concise end that distills particular implications for the learn of the sturdy boundary layer. This constitution emphasizes the actual effects, yet whilst supplies relevance to the technical facets of numerical schemes and post-processing instruments. the choice of the appropriate literature throughout the creation, and its use alongside the paintings competently combines literature from study groups: fluid dynamics, and boundary-layer meteorology.
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Analyses of Turbulence in the Neutrally and Stably Stratified Planetary Boundary Layer (Springer Theses) by Cedrick Ansorge