Tapracharoen, Krisda
(2018)
A Hybrid Filtered Density Function Spectral-Element Large Eddy Simulator.
Doctoral Dissertation, University of Pittsburgh.
(Unpublished)
Abstract
This dissertation is focused on the development of a hybrid scheme, combining the spectral-element method (SEM) solver with a Lagrangian Monte Carlo (MC) filtered density function (FDF) simulator for large eddy simulation (LES) of turbulent flows. The methodology is shown to be suitable for LES, as a larger portion of the resolved energy is captured as the order of spectral approximation increases. The consistency and the overall performance of the SEM-MC solver, and the realizability of the simulated results are demonstrated via LES of a temporally developing mixing layer under both non-reacting and reacting conditions. The effects of grid resolution and polynomial order ($h-p$ refinement), and ensemble average size ($\Delta_E$) are studied. The computational scheme is fully parallelized via the message passing interface (MPI) methodology.
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Details
Item Type: |
University of Pittsburgh ETD
|
Status: |
Unpublished |
Creators/Authors: |
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ETD Committee: |
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Date: |
25 September 2018 |
Date Type: |
Publication |
Defense Date: |
16 July 2018 |
Approval Date: |
25 September 2018 |
Submission Date: |
30 July 2018 |
Access Restriction: |
No restriction; Release the ETD for access worldwide immediately. |
Number of Pages: |
58 |
Institution: |
University of Pittsburgh |
Schools and Programs: |
Swanson School of Engineering > Computational Modeling and Simulation |
Degree: |
PhD - Doctor of Philosophy |
Thesis Type: |
Doctoral Dissertation |
Refereed: |
Yes |
Uncontrolled Keywords: |
large eddy simulation; filtered density function; Monte Carlo methods; spectral-element method. |
Date Deposited: |
25 Sep 2018 16:48 |
Last Modified: |
25 Sep 2018 16:48 |
URI: |
http://d-scholarship.pitt.edu/id/eprint/35062 |
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