Zobrazeno 1 - 10
of 41
pro vyhledávání: '"N. Robb McDonald"'
Autor:
Rhodri Nelson, N. Robb McDonald
Publikováno v:
Geophysical & Astrophysical Fluid Dynamics. 105:23-47
The time-dependent interaction of a point vortex with a vorticity jump separating regions of opposite signed and constant vorticities on the surface of a non-rotating sphere is examined. First, small amplitude interfacial waves are considered where l
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c309d24bea635040923f2b86e78524a5
https://doi.org/10.1080/03091929.2010.500288
https://doi.org/10.1080/03091929.2010.500288
Autor:
N. Robb McDonald
Publikováno v:
Theoretical and Computational Fluid Dynamics. 24:537-550
The time-dependent evolution of source-driven Hele-Shaw free boundary flows in the presence of an obstacle is computed numerically. The Baiocchi transformation is used to convert the Hele-Shaw Laplacian growth problem into a free boundary problem for
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d6013229fe4dd042dc0f0eb38b37f02f
https://doi.org/10.1007/s00162-010-0185-7
https://doi.org/10.1007/s00162-010-0185-7
Autor:
N. Robb McDonald, Edward R. Johnson
Publikováno v:
Journal of Physical Oceanography. 39:2665-2674
A one-parameter family of exact solutions describing the bifurcation of a steady two-dimensional current with uniform vorticity near a gap in a thin barrier is found. The unsteady evolution of source-driven flows toward these steady states is studied
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::165cbe60a93950087f8579be57bc0940
https://doi.org/10.1175/2009jpo4191.1
https://doi.org/10.1175/2009jpo4191.1
Autor:
N. Robb McDonald, Rhodri Nelson
Publikováno v:
Theoretical and Computational Fluid Dynamics. 24:157-162
Techniques based on the conformal mapping and the numerical method of contour dynamics are presented for computing the motion of a finite area patch of constant vorticity on a sphere in the presence of a thin barrier with two gaps. Finite area patch
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::25bcb09d8e7d7ab6d44804cc875a2dc7
https://doi.org/10.1007/s00162-009-0097-6
https://doi.org/10.1007/s00162-009-0097-6
Autor:
Byoung Woong An, N. Robb McDonald
Publikováno v:
Dynamics of Atmospheres and Oceans. 40:237-253
The nonlinear interaction of vorticity driven coastal currents and eddies with topography is studied. The topography is either a semi-infinite escarpment perpendicular to the coast (such that topographic waves propagate toward the coast) or a semi-ci
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a93f2bb9951ecb9111f285fd18b70569
https://doi.org/10.1016/j.dynatmoce.2005.04.002
https://doi.org/10.1016/j.dynatmoce.2005.04.002
Autor:
N. Robb McDonald, Edward R. Johnson
Publikováno v:
Journal of Fluid Mechanics. 531:335-358
Two models are presented for the motion of vortices near gaps in infinitely long barriers. The first model considers a line vortex for which the exact nonlinear trajectories satisfying the governing two-dimensional Euler equations are obtained analyt
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::461936e2719115ef00e21757350d3463
https://doi.org/10.1017/s0022112005003976
https://doi.org/10.1017/s0022112005003976
Autor:
N. Robb McDonald, Edward R. Johnson
Publikováno v:
Geophysical & Astrophysical Fluid Dynamics. 99:49-60
The effect of approximating a circular island of non-zero radius by a point dipole – the point island approximation – on the dynamics of two-dimensional vortices is studied. The approximation enables the Hamiltonian for N point vortices moving am
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::49eab043264fd4f618eef78f5cf123f0
https://doi.org/10.1080/03091920512331323896
https://doi.org/10.1080/03091920512331323896
Autor:
Andrew J. P. White, N. Robb McDonald
Publikováno v:
Journal of Physical Oceanography. 34:2808-2824
This work examines the dynamics of point vortices in a two-layer fluid near large-amplitude, sharply varying topography like that which occurs in continental shelf regions. Topography takes the form of an infinitely long step change in depth, and the
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2d93087f8d08a441881a1f67a4a0460f
https://doi.org/10.1175/jpo2658.1
https://doi.org/10.1175/jpo2658.1
Publikováno v:
Journal of Fluid Mechanics. 515:63-86
Baroclinic geostrophic adjustment in a rotating circular basin is investigated in a laboratory study. The adjustment process consists of a linear phase before advective and dissipative effects dominate the response for longer time. This work describe
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3002249cd6ef3d81e15641b1a50af2f6
https://doi.org/10.1017/s0022112004000230
https://doi.org/10.1017/s0022112004000230
Autor:
N. Robb McDonald, Byoung Woong An
Publikováno v:
Continental Shelf Research. 24:1531-1547
The offshore spreading of coastal river outflows over shelf-like topography is inhibited by the demands of potential vorticity conservation. As a result, outflows tend to remain coastally trapped and flow parallel to the coast. Alongshore currents ma
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f37628dd506d2863d5d182b21a74312e
https://doi.org/10.1016/j.csr.2004.05.002
https://doi.org/10.1016/j.csr.2004.05.002