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Large-eddy simulations of flow and heat transfer in heated concentric annulus with inner cylinder rotation

Schneider, Marvin and Younis, Bassam and Weigand, B. (2017) Large-eddy simulations of flow and heat transfer in heated concentric annulus with inner cylinder rotation. International Journal of Heat and Mass Transfer (114), pp. 1248-1262. Elsevier. doi: 10.1016/j.ijheatmasstransfer.2017.07.022. ISSN 0017-9310.

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Official URL: http://www.sciencedirect.com/science/article/pii/S0017931017326480


Results from large-eddy simulations are reported for the flow and heat transfer in the annular gap between two concentric cylinders with the outer cylinder stationary and the inner cylinder rotating about its longitudinal axis. The objective of the study was to document the effects of destabilizing rotation on the turbulent transport of heat and momentum. The inner cylinder was heated by applying a constant heat flux while the conditions at the outer wall were adiabatic. Results were obtained for a stationary inner cylinder to serve as baseline for isolating the effects of rotation, and for the inner cylinder rotated at two different rotation numbers viz. 0.21 and 0.86. The Reynolds number was set at 9000 for all cases. With the outer cylinder stationary and the inner cylinder rotating, the effects of rotation are to destabilize the turbulence leading to enhanced mixing and significant increase in wall shear stress and Nusselt number. Additional effects include the displacement from each other of the points where the Reynolds stresses and the corresponding rates of strain are zero, and the non-alignment of their respective directions. These and other results reported herein provide a useful contribution to the very limited literature on heated turbulent flows destabilized by rotation, and can serve as benchmark to aid in the development and validation of turbulence closures for engineering applications.

Item URL in elib:https://elib.dlr.de/113456/
Document Type:Article
Title:Large-eddy simulations of flow and heat transfer in heated concentric annulus with inner cylinder rotation
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Schneider, MarvinUNSPECIFIEDhttps://orcid.org/0000-0002-4110-8443UNSPECIFIED
Younis, BassamDepartment of Civil & Environmental Engineering, University of California, Davis, CA 95616, USAUNSPECIFIEDUNSPECIFIED
Date:November 2017
Journal or Publication Title:International Journal of Heat and Mass Transfer
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In ISI Web of Science:Yes
Page Range:pp. 1248-1262
Keywords:Destabilizing Rotation, Concentric annulus,LESHeat transfer
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:propulsion systems
DLR - Research area:Aeronautics
DLR - Program:L ER - Engine Research
DLR - Research theme (Project):L - Turbine Technologies (old)
Location: Stuttgart
Institutes and Institutions:Institute of Structures and Design > Design and Manufacture Technologies
Deposited By: Schneider, Marvin
Deposited On:11 Dec 2017 11:40
Last Modified:06 Sep 2019 15:16

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