NDLI: Transient Thermal Response of Turbulent Compressible Boundary Layers

Content Provider	The American Society of Mechanical Engineers (ASME) Digital Collection
Author	Li, Hongwei Nalim, M. Razi Charles, L. Merkle
Copyright Year	2008
Abstract	A general numerical method is developed with the capability to predict the transient thermal boundary layer response under various flow and thermal conditions. The transient thermal boundary layer variation due to a moving compressible turbulent fluid of varying temperature was numerically studied on a 2-D semi-infinite flat plate. The Reynolds-averaged boundary-layer equations are solved based on the compressible Falkner-Skan transformation. Turbulence is modeled using a two-layer eddy-viscosity model developed by Cebeci and Smith, and the turbulent Prandtl number formulation originally developed by Kays and Crawford. The governing differential equations are discretized with the Keller-box method. The numerical accuracy is validated through grid independence studies and comparison with the steady state solution. In turbulent flow as in laminar, heat transfer coefficient is initially very different from that obtained from quasi-steady analysis. It is found that, both the transient time scale and the magnitude of the transient heat transfer coefficients differ significantly between turbulent and laminar flow. The more complex variation of transient heat transfer rate in turbulent flow is evident, and needs further study.
Starting Page	711
Ending Page	720
Page Count	10
File Format	PDF
ISBN	9780791848715
DOI	10.1115/IMECE2008-68788
e-ISBN	9780791838402
Volume Number	Volume 10: Heat Transfer, Fluid Flows, and Thermal Systems, Parts A, B, and C
Conference Proceedings	ASME 2008 International Mechanical Engineering Congress and Exposition
Language	English
Publisher Date	2008-10-31
Publisher Place	Boston, Massachusetts, USA
Access Restriction	Subscribed
Subject Keyword	Thermal boundary layers Viscosity Turbulence Temperature Flat plates Transient heat transfer Flow (dynamics) Steady state Transients (dynamics) Fluids Prandtl number Numerical analysis Laminar flow Differential equations Eddies (fluid dynamics) Heat transfer coefficients Boundary layers
Content Type	Text
Resource Type	Article

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