The temperature spectrum generated by frictional heating in isotropic turbulence

DOI10.1017/JFM.2014.93zbMATH Open1416.76053arXiv1402.3259OpenAlexW3101984727MaRDI QIDQ4967944

Wouter J. T. Bos

Publication date: 11 July 2019

Published in: Journal of Fluid Mechanics (Search for Journal in Brave)

Abstract: In every turbulent flow with non-zero viscosity, heat is generated by viscous friction. This heat is then mixed by the velocity field. We consider how heat fluctuations generated this way are injected and distributed over length scales in isotropic turbulence. A triadic closure is derived and numerically integrated. It is shown how the heat fluctuation spectrum depends on the Reynolds and Prandtl numbers.

Full work available at URL: https://arxiv.org/abs/1402.3259

Mathematics Subject Classification ID

Turbulent transport, mixing (76F25) Isotropic turbulence; homogeneous turbulence (76F05)

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