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A Hybrid Filtered Density Function Spectral-Element Large Eddy Simulator

Tapracharoen, Krisda (2018) A Hybrid Filtered Density Function Spectral-Element Large Eddy Simulator. Doctoral Dissertation, University of Pittsburgh. (Unpublished)

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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Status: Unpublished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:
CreatorsEmailPitt UsernameORCID
Tapracharoen, Krisdakrt35@pitt.edukrt350000-0002-7900-5140
ETD Committee:
TitleMemberEmail AddressPitt UsernameORCID
Committee ChairGivi, Peymanpeg10@pitt.edu
Committee CoChairSammak, Shervinshervin.sammak@gmail.com
Committee MemberBabaee, Hessamh.babaee@pitt.edu
Committee MemberLee, Sangyeopsylee@pitt.edu
Committee MemberSingh, Satbirsatbirs@andrew.cmu.edu
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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