Bulletin of the American Physical Society
71st Annual Meeting of the APS Division of Fluid Dynamics
Volume 63, Number 13
Sunday–Tuesday, November 18–20, 2018; Atlanta, Georgia
Session M34: Convection & Buoyancy Driven Flows: Numerical Simulations
8:00 AM–9:57 AM,
Tuesday, November 20, 2018
Georgia World Congress Center Room: B406
Chair: Yogesh Jaluria, Rutgers University
Abstract ID: BAPS.2018.DFD.M34.8
Abstract: M34.00008 : Heat Transfer in Wall-bounded Flows at Transcritical Conditions*
9:31 AM–9:44 AM
(Pennsylvania State University)
Werner M. Ihme
Despite the prevalence of fluids at transcritical conditions in engineering applications, the structure of the thermo-viscous boundary layer and heat transfer in wall-bounded flows are only incompletely understood. To address this, DNS of a channel flow at transcritical conditions is performed, in which a temperature differential at the bottom and top walls is prescribed so that the thermodynamic state of the fluid crosses the Widom line and the density varies by a factor of 18. The DNS is analyzed with the specific focus on examining the thermo-viscous boundary layer structure and testing the scaling relations. It is found that the canonical van Driest transformation performs well in describing the logarithmic wall layer region, and the observed scaling behavior of the streamwise energy spectrum provides support of the attached-eddy model at transcritical conditions.
*JG is funded by a Charles H. Kruger Stanford Graduate Fellowship. XY would like to acknowledge funding for participation in the 2018 Center for Turbulence Research (CTR) Summer Program.
To cite this abstract, use the following reference: http://meetings.aps.org/link/BAPS.2018.DFD.M34.8
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