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Large Eddy Simulations of Isothermal and Non-Isothermal Turbulent Flows for High Temperature Gas Cooled Reactors

Salkhordeh, Sasan (2016) Large Eddy Simulations of Isothermal and Non-Isothermal Turbulent Flows for High Temperature Gas Cooled Reactors. Doctoral Dissertation, University of Pittsburgh. (Unpublished)

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In order to develop an experimentally validated computational model for the lower plenum of High Temperature Gas-Cooled Reactors (HTGR), three separate Large Eddy Simulation (LES) studies are conducted. First, detailed study is made of LES for an isothermal turbulent jet, which is compared to well-accepted experimental data. Inconsistencies in the literature surrounding the Reynolds number dependence for the turbulent statistics are comprehensively addressed. Second, a non-isothermal LES study of flow over a cylinder is conducted, and includes comparison between experimental data and LES for different subcritical Reynolds numbers. The final study is that of LES for a non-isothermal round jet, where the effect of a precursor simulation is found to play a vital role for capturing the underlying physics within the turbulent Navier Stokes and energy equations. Good agreement is obtained between our LES predictions and experimental measurements in both near-field and far-field data. This research lays the groundwork needed to develop high-fidelity, experimentally validated computational models of the complex mixing flow in the HTGR lower plenum.


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Item Type: University of Pittsburgh ETD
Status: Unpublished
CreatorsEmailPitt UsernameORCID
Salkhordeh, Sasansas229@pitt.eduSAS229
ETD Committee:
TitleMemberEmail AddressPitt UsernameORCID
Committee ChairKimber, Markmlk53@pitt.eduMLK53
Committee MemberJana,
Committee MemberSchaefer, Lauralas149@pitt.eduLAS149
Committee MemberBrigham, Johnbrigham@pitt.eduBRIGHAM
Date: 26 January 2016
Date Type: Publication
Defense Date: 17 November 2015
Approval Date: 26 January 2016
Submission Date: 4 December 2015
Access Restriction: No restriction; Release the ETD for access worldwide immediately.
Number of Pages: 96
Institution: University of Pittsburgh
Schools and Programs: Swanson School of Engineering > Mechanical Engineering and Materials Science
Degree: PhD - Doctor of Philosophy
Thesis Type: Doctoral Dissertation
Refereed: Yes
Uncontrolled Keywords: Large Eddy Simulation, High Temperature Gas Cooled Reactors
Date Deposited: 26 Jan 2016 15:09
Last Modified: 21 Sep 2017 14:41


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