Nutrient transport from an artificial upwelling of deep sea water

摘要: The transport of nutrient-rich, deep sea water from an artificial upwelling pipe has been simulated. A numerical model built within a commercial Computational Fluid Dynamics (CFD) package. considers the flow after it is ejected outlet in negatively buoyant plume (densimetric Froude number = −2.6), stably stratified ocean environment subject to strong current cross flow. Two cross-flow profiles were tested with momentum flux ratios equal 0.92 and 3.7. standard k-e turbulence employed range turbulent Schmidt Prandtl numbers tested. In all cases results show that rapid diffusion heat salinity at causes attain neutral buoyancy very rapidly, preventing fountain-like behavior. At higher ratio behavior more pronounced close outlet. cross-current makes horizontal advection dominant process downstream. nutrient trajectory remains largely one relatively thin layer, making any profile less important. Very little unsteady was observed. reduced than 2% its inlet concentration 10 meters downstream this result independent or number. Initial would suggest if such be viable for farming project, large pipes necessary. Further work will have determine minimum required sustain phytoplankton population spacing between pipes.