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Hittade 2 avhandlingar som matchar ovanstående sökkriterier.

1. 1. Spectral-element simulations of separated turbulent internal flows

   Författare :Johan Ohlsson; Dan Prof Henningson; Jesper Oppelstrup; KTH; []
   Nyckelord :spectral element method; direct numerical simulations DNS ; turbulence; dealiasing; three-dimensional separation; massively parallel simulations;

   Sammanfattning : .... LÄS MER

3. 2. Spectral-element simulations of turbulent wall-bounded flows including transition and separation

   Författare :Johan Malm; Dan Henningson; Philipp Schlatter; Suad Jakirlic; KTH; []
   Nyckelord :spectral-element method; direct numerical simulation DNS ; large-eddy simulation LES ; turbulence; transition; over-integration; three-dimensional separation; massively parallel simulations; proper orthogonal decomposition POD ; Koopman modes; vorticity stretching; coherence; SRA - E-vetenskap SeRC ; SRA - E-Science SeRC ;

   Sammanfattning : The spectral-element method (SEM) is used to study wall-bounded turbulent flowsin moderately complex geometries. The first part of the thesis is devoted to simulations of canonical flow cases, such as temporal K-type transitionand turbulent channel flow, to investigate general resolution requirements and computational efficiency of the numerical code nek5000. LÄS MER