Dust devil generation
2014 (English)In: Physica Scripta, ISSN 0031-8949, E-ISSN 1402-4896, Vol. 89, no 7, 075606- p.Article in journal (Refereed) Published
The equations describing axi-symmetric nonlinear internal gravity waves in an unstable atmosphere are derived. A hydrodynamic model of a dust devil generation mechanism in such an atmosphere is investigated. It is shown that in an unstably stratified atmosphere the convective plumes with poloidal motion can grow exponentially. Furthermore, it is demonstrated that these convective plumes in an atmosphere with weak large scale toroidal motion are unstable with respect to three-dimensional dust devil generation.
Place, publisher, year, edition, pages
IOP Publishing: Hybrid Open Access , 2014. Vol. 89, no 7, 075606- p.
vortex structures; internal gravity waves; tornadoes; temperature gradients
IdentifiersURN: urn:nbn:se:liu:diva-111299DOI: 10.1088/0031-8949/89/7/075606ISI: 000341561800028OAI: oai:DiVA.org:liu-111299DiVA: diva2:755285
Funding Agencies|International Space Science Institute in Bern (Switzerland); Russian Academy of Sciences [8, 22]; RFBR [14-05-00850]; NSF ; University of Aix-Marseille/CNRS; IMeRA Grant for Advanced Research2014-10-142014-10-142015-01-22