Unidirectional modes induced by nontraditional Coriolis force in stratified fluids

Autor:	Perez, Nicolas, Delplace, Pierre, Venaille, Antoine
Rok vydání:	2021
Předmět:	Physics - Fluid Dynamics Condensed Matter - Mesoscale and Nanoscale Physics Physics - Atmospheric and Oceanic Physics
Druh dokumentu:	Working Paper
DOI:	10.1103/PhysRevLett.128.184501
Popis:	Using topology, we unveil the existence of new unidirectional modes in compressible rotating stratified fluids. We relate their emergence to the breaking of time-reversal symmetry by rotation and vertical mirror symmetry by stratification and gravity. We stress the role of the Coriolis force's nontraditional part, induced by a rotation field tangent to the surface. In contrast with horizontally trapped equatorial waves induced by the traditional component of Coriolis force perpendicular to the surface, we find vertically trapped modes that are trapped along interfaces between regions with distinct stratification properties. We show that such modes are generalized atmospheric Lamb waves whose direction of propagation can be selected by the nontraditional component of the Coriolis force. Comment: 8 pages, 3 figures
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/2110.02002 Zobrazit plný text záznamu View this record from Arxiv