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| 2. |
- Omstedt, Anders, et al.
(författare)
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Measured and numerically-simulated autumn cooling in the Bay of Bothnia
- 1983
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Ingår i: Tellus. Series A, Dynamic meteorology and oceanography. - : Stockholm University Press. - 0280-6495 .- 1600-0870. ; 35A:3, s. 231-240
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Tidskriftsartikel (refereegranskat)abstract
- Vertical temperature profiles are analysed for the case of cooling of brackish sea water around the temperature of maximum density. Field measurements in the Bay of Bothnia cover a period of 52 days, during which the surface water was cooled from 6°C to 1.5°C. A mathematical model, which is based on the conservation equations for momentum, heat and salt in their one-dimensional forms, is presented. The equation of state is linear with respect to salinity and quadratic with respect to temperature. Turbulent exchange coefficients are calculated with a two-equation model of turbulence.The measured temperature profiles clearly demonstrate the importance of both temperature and salinity gradients in the mixed-layer dynamics. The mathematical model describes these and the general development of the temperature profile in a most satisfactory way.
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| 3. |
- Svensson, Urban, et al.
(författare)
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A one-dimensional numerical model study of some basic features of the flow in ice-covered lakes
- 1980
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Ingår i: Journal of Hydraulic Research. - : Informa UK Limited. - 0022-1686 .- 1814-2079. ; 18:3, s. 251-267
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Tidskriftsartikel (refereegranskat)abstract
- one-dimensional numerical model incorporating the - turbulence model is used to study the flow in an ice-covered lake dominated by through-flow. The effects of the rotation of the earth and vertical heat flux on the dimensionless velocity and eddy viscosity profiles are shown and characteristic length scales are presented.
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| 4. |
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| 5. |
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| 6. |
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| 7. |
- Svensson, Urban
(författare)
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On the numerical prediction of vertical turbulent exchange in stratified flows
- 1980
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Ingår i: Software, practice & experience. - 0038-0644 .- 1097-024X. ; 2, s. 686-696
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Tidskriftsartikel (refereegranskat)abstract
- A one-dimensional mathematical model is employed for analyzing a laboratory experiment of basic significance in geophysical flows. The mathematical model is based on the conservation laws for momentum and salinity. A two-equation turbulence model is used for the determination of exchange coefficients. A sensitivity study indicates that the turbulent Prandtl number for salinity should receive special attention. Also the buoyancy term in the equation determining the turbulent lengthscale is found to exercise a large influence. Suggestions for these terms are presented
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| 8. |
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