Reflections on a Penetration Theory of Turbulent Heat Transfer

2010/09/13 by Trinh Khanh Tuoc, Tuoc, Trinh Khanh
Engineering · Environmental Science · #FOS: Physical sciences #Fluid Dynamics (physics.flu-dyn) #Fluid Dynamics and Turbulent Flows #Heat Transfer Mechanisms #Plant Water Relations and Carbon Dynamics

paper · pdf · doi:10.48550/arxiv.1009.2280

openalex publication_date 2010/09/13 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

This paper discusses a modified penetration theory where the time scale for the momentum wall layer is based on the onset of ejections from the wall but the time scale for the thermal layer is based on the unsteady state diffusion of heat from the wall into the streamwise flow, not the renewal of heat from eddies penetrating the wall layer. A method for the determination of the thickness of the thermal wall layer has been developed. The theory correlates adequately experimental data for both the thickness of the thermal wall layer and the Nusselt number. Key words: Heat transfer, penetration theory, turbulence, time scales.

Citations

• A Theoretical Closure for Turbulent Flows Near Walls
• Coherent Motions in the Turbulent Boundary Layer

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