Skip to main content Accessibility help

High Reynolds number flow past an equatorial island

  • Ross Hendry (a1) and Carl Wunsch (a2)


A survey of the density field in the immediate vicinity of Jarvis Island was made in April 1971. The island is isolated and is situated in the Pacific Equatorial Undercurrent, thus presenting the opportunity to study a high Reynolds number (∼ 109) stratified shear flow. Large deflexions of the isopycnals were observed near the island. Solutions derived from the perfect-fluid equations of Drazin (1961) axe in reasonable agreement with the observed mass field in the upstream region. Downstream, a wake region was apparent, but the dynamics of the wake are obscure. A coefficient of pressure deficit in the wake is in the same range as values computed from homogeneous laboratory flows, but baroclinic effects are observed.



Hide All
Barkley, R. A. 1972 Johnston Atoll's wake. J. Mar. Res. 30, 201215.
Berger, E. & Wille, R. 1972 Periodic flow phenomena. Ann. Rev. Fluid Mech. 4, 313340.
Chopra, K. P. & Hubert, L. F. 1965 Mesoscale eddies in wakes of islands. J. Atmoe. Sci. 22, 652657.
Drazin, P. G. 1961 On the steady flow of a fluid of variable densit.y past an obstacle. Tellus, 13, 239251.
Gibson, C. H. & Williams, R. B. 1972 Measurements of turbulence and turbulence mixing in the Pacific Equatorial Undercurrent. Presented at Int. Xymp. on Oceanography of the South Pacijc, Wellington, New Zealand (unpublished manuscript).
Hawthorne, W. R. & Martin, M. E. 1955 The creation of secondary vorticity in the flow over a hemisphere due to density gradient and shear. Proc. Roy. Xoc. A 232, 184195.
Hoga, N. G. 1972 Steady flow past an island with application to Bermuda. Gwphys. Fluid Dyn. 4, 5581.
Knauss, J. A. 1960 Measurements of the Cromwell Current. Deep Sea Res. 6, 265285.
Lamb, H. 1932 Hydrodynamics, 6th edn. Dover.
Lighthill, M. J. 1956 Drift. J. F'Euid Mech. 1, 3153.
Roshko, A. 1961 Experiments on the flow past a cylinder at very high Reynolds number. J. Fluid Mech. 10, 345356.
Schooley, A. H. & Stewart, R. W. 1963 Experiments with a self-propelled body submerged in a fluid with a vertical density gradient. J. Fluid Mech. 15, 8396.
Stockhausen, P. J., Clark, C. B. & Kennedy, J. F. 1966 Three-dimensional momentumless wakes in density-stratified liquids. Hydrodynamics Laboratory, M.I.T. Rep. no. 93.
Sverdrup, H. U., Johnson, M. W. & Fleming, R. H. 1942 The Ocean, Their Physics, Chemistry and General Biology. Prentice-Hall.
Taft, B. A., Hickey, B., Wunsch, C. & Baker, D. J. 1973 Equatorial currents at 150° W in April 1971. In preparation.
Tsuchiya, M. 1968 Upper Waters of the Intertropical Pacific. Johns Hopkins Press.
Wunsch, C. 1972 Temperature microstructure on the Bermuda slope with application to the mean flow. Tellus, 24 (a), 350367.
MathJax is a JavaScript display engine for mathematics. For more information see

High Reynolds number flow past an equatorial island

  • Ross Hendry (a1) and Carl Wunsch (a2)


Full text views

Total number of HTML views: 0
Total number of PDF views: 0 *
Loading metrics...

Abstract views

Total abstract views: 0 *
Loading metrics...

* Views captured on Cambridge Core between <date>. This data will be updated every 24 hours.

Usage data cannot currently be displayed