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Continental Slope Of The Numerical Simulation Of Rotating Gravity Density Flow

Posted on:2006-06-16Degree:MasterType:Thesis
Country:ChinaCandidate:Q A ZhanFull Text:PDF
GTID:2190360152985926Subject:Environmental Science
Abstract/Summary:PDF Full Text Request
The non-rotational dense water on the slope is investigated using MITgcm, a three-dimensional, non-hydrostatic equations numerical model. Uniform resolution is used in the vertical direction and variable resolution is used in the horizontal direction. The numerical results show temperature anomaly on the slope. Evidently, the flow of dense water on the slope is also very complex. Increasing the angle of the slope, dense water descends into the depth quickly. Decreasing the angle of the slope, dense water sinks down the slope slowly. Changing the cold source quantity also affect the plumes feature. Decreasing the cold source flux, dense water sinks down along the slope. On the slope, the temperature anomaly reduces and the dense water influences the surroundings weakly. Increasing the cold source flux, dense water sinks down the slope deeply. On the slope, the temperature anomaly increases and the water become colder. This artic also shows the influence of the Richardson number on the plumes. On the slope, the gradient of the Richardson number is reduced below 1/4, Kelvin-Helmholtz instability is possible, and leads to entrainment of ambient fluid into the plume, modifying the density, and hence the acceleration down the slope. Finally, a pseudo tide is set on an open boundary. It is shown that the plume also respond to the tide driven.
Keywords/Search Tags:numerical model, dense water flow, non-rotational fluid, slope
PDF Full Text Request
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