NDLI: Viscous heating effects in fluids with temperature-dependent viscosity: triggering of secondary flows

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Viscous heating effects in fluids with temperature-dependent viscosity: triggering of secondary flows

Content Provider	Semantic Scholar
Author	Macedonio, A.
Copyright Year	2003
Abstract	Viscous heating can play an important role in the dynamics of fluids with a strongly temperature-dependent viscosity because of the coupling between the energy and momentum equations. The heat generated by viscous friction produces a local increase in temperature near the tube walls with a consequent decrease of the viscosity and a strong stratification in the viscosity profile which can trigger instabilities and a transition to secondary flows. In this paper we present two separate theoretical models: a linear stability analysis and a direct numerical simulation (DNS) of a plane channel flow. In particular DNS shows that, in certain regimes, viscous heating can trigger and sustain a particular class of secondary rotational flows which appear organized into coherent structures similar to roller vortices. This phenomenon can play a very important role in the dynamics of magma flows and, to our knowledge, it is the first time that it has been investigated by a direct numerical simulation.
Starting Page	21
Ending Page	38
Page Count	18
File Format	PDF HTM / HTML
DOI	10.1017/S0022112005006075
Volume Number	540
Alternate Webpage(s)	http://arxiv.org/pdf/physics/0312066v1.pdf
Alternate Webpage(s)	https://arxiv.org/pdf/physics/0312066v3.pdf
Alternate Webpage(s)	http://arxiv.org/pdf/physics/0312066v2.pdf
Alternate Webpage(s)	https://doi.org/10.1017/S0022112005006075
Language	English
Access Restriction	Open
Content Type	Text
Resource Type	Article

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