LARGE EDDY SIMULATION OF THE DIFFUSION PROCESS OF NUTRIENT-RICH UP-WELLED SEAWATER

摘要

The diffusion process of deep seawater drawn up by a vertical pipe deployed in the ocean is investigated. This vertical pipe is based on the principal of perpetual salt fountain. Numerical simulations of seawater upwelling from the pipe are performed based on experiments conducted in the Mariana trench region. Two turbulence modeling approaches were examined: k-e model and Large Eddy Simulations (LES). The results in both cases show that the deep seawater diffusion after ejecting from the pipe. LES results show half range vertical penetration of k-e model and predict horizontal diffusion is stronger than the vertical one.