Please use this identifier to cite or link to this item:
http://hdl.handle.net/2122/10828
DC Field | Value | Language |
---|---|---|
dc.date.accessioned | 2018-02-27T13:03:29Z | en |
dc.date.available | 2018-02-27T13:03:29Z | en |
dc.date.issued | 2005 | en |
dc.identifier.uri | http://hdl.handle.net/2122/10828 | en |
dc.description.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. | en |
dc.language.iso | English | en |
dc.relation.ispartof | Journal of Fluid Mechanics | en |
dc.relation.ispartofseries | /540 (2005) | en |
dc.title | Viscous heating effects in fluids with temperature-dependent viscosity: triggering of secondary flows | en |
dc.type | article | en |
dc.description.status | Published | en |
dc.description.pagenumber | 21-38 | en |
dc.identifier.doi | 10.1017/S0022112005006075 | en |
dc.description.obiettivoSpecifico | 4V. Dinamica dei processi pre-eruttivi | en |
dc.description.obiettivoSpecifico | 5V. Dinamica dei processi eruttivi e post-eruttivi | en |
dc.description.journalType | JCR Journal | en |
dc.contributor.author | Costa, Antonio | en |
dc.contributor.author | Macedonio, Giovanni | en |
dc.contributor.department | Istituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione OV, Napoli, Italia | en |
dc.contributor.department | Istituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione OV, Napoli, Italia | en |
item.openairetype | article | - |
item.cerifentitytype | Publications | - |
item.languageiso639-1 | en | - |
item.grantfulltext | restricted | - |
item.openairecristype | http://purl.org/coar/resource_type/c_18cf | - |
item.fulltext | With Fulltext | - |
crisitem.author.dept | Istituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione Bologna, Bologna, Italia | - |
crisitem.author.dept | Istituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione OV, Napoli, Italia | - |
crisitem.author.orcid | 0000-0002-4987-6471 | - |
crisitem.author.orcid | 0000-0001-6604-1479 | - |
crisitem.author.parentorg | Istituto Nazionale di Geofisica e Vulcanologia | - |
crisitem.author.parentorg | Istituto Nazionale di Geofisica e Vulcanologia | - |
crisitem.department.parentorg | Istituto Nazionale di Geofisica e Vulcanologia | - |
crisitem.department.parentorg | Istituto Nazionale di Geofisica e Vulcanologia | - |
Appears in Collections: | Article published / in press |
Files in This Item:
File | Description | Size | Format | Existing users please Login |
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cosmac2005_jfm.pdf | 345.52 kB | Adobe PDF |
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