Zobrazeno 1 - 10
of 173
pro vyhledávání: '"David G. Dritschel"'
Publikováno v:
Fluids, Vol 9, Iss 6, p 122 (2024)
This paper seeks and examines N-symmetric vortical solutions of the two-layer geostrophic model for the special case when the vortices (or eddies) have vanishing summed strength (circulation anomaly). This study is an extension [Sokolovskiy et al. Ph
Externí odkaz:
https://doaj.org/article/5e989a0555b948d59b007fcdeeb100b4
Publikováno v:
Fluids, Vol 2, Iss 3, p 37 (2017)
We investigate the interaction between a heton and a current generated by a filament of buoyancy anomaly at the surface. Hetons are baroclinic dipoles consisting of a pair of vortices of opposite signs lying at different depths. Such structures have
Externí odkaz:
https://doaj.org/article/ab093a521b804f08a2e22c55466374d9
Publikováno v:
Regular and Chaotic Dynamics. 26:463-466
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::26be9b45abd919c0125a7096f613d9b7
https://doi.org/10.1134/s1560354721050014
https://doi.org/10.1134/s1560354721050014
Autor:
David G. Dritschel, Giorgio Riccardi
Publikováno v:
Regular and Chaotic Dynamics. 26:562-575
The paper deals with the calculation of the internal singularities of the Schwarz function corresponding to the boundary of a planar vortex patch during its self-induced motion in an inviscid, isochoric fluid. The vortex boundary is approximated by a
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::85d898f7e22b1dfbf038045681171aae
https://doi.org/10.1134/s1560354721050075
https://doi.org/10.1134/s1560354721050075
We revisit the classical problem of the self-similar, finite-time collapse of three vortices. We extend the study to the generalised two-dimensional Euler equations as well as the generalised three-dimensional quasi-geostrophic equations. In both the
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::2458d8406efdb677b49be33c71715f06
https://hdl.handle.net/10023/25501
https://hdl.handle.net/10023/25501
Publikováno v:
Journal of Fluid Mechanics. 930
Based on an assumption of strongly inhomogeneous potential vorticity mixing in quasi-geostrophic $\beta$ -plane turbulence, a relation is obtained between the mean spacing of latitudinally meandering zonal jets and the total kinetic energy of the flo
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e6cab7f890d516ea01bb2fc573d59c11
https://doi.org/10.1017/jfm.2021.898
https://doi.org/10.1017/jfm.2021.898
Autor:
David G. Dritschel
This paper examines the stability and nonlinear evolution of configurations of equal-strength point vortices equally spaced on a ring of constant radius, with or without a central vortex, in the three-dimensional quasi-geostrophic compressible atmosp
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a384e1b3480ac9ffee5161a3b23db835
https://hdl.handle.net/10023/24031
https://hdl.handle.net/10023/24031
Publikováno v:
Journal of Fluid Mechanics. 865:100-136
The Green–Naghdi equations are an extension of the shallow-water equations that capture the effects of finite fluid depth at arbitrary order in the characteristic height to width aspect ratio $H/L$. The shallow-water equations capture these effects
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::2581828c58cc0b470c6751adfbc89686
https://doi.org/10.1017/jfm.2019.47
https://doi.org/10.1017/jfm.2019.47
Funding: Yu is supported by an NSERC Discovery grant. Incompressible fluid flows are characterised by high correlations between low pressure and high velocity and vorticity. The velocity-pressure correlation is an immediate consequence of fluid accel
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::407fbbaf92b8703e0ba62ee5369be01f
http://www-vortex.mcs.st-and.ac.uk/~chuong/20200715correlation.pdf
http://www-vortex.mcs.st-and.ac.uk/~chuong/20200715correlation.pdf
The angle between the wind stress that overlies the ocean and the resulting current at the ocean surface is calculated for a two-layer ocean with uniform eddy viscosity in the lower layer and for several assumed eddy viscosity profiles in the upper l
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::4dcbd72b7627024b69bf2d6b242ad51d
https://hdl.handle.net/10023/20985
https://hdl.handle.net/10023/20985