In recent years, significant effort has been put into developing automated multi-physics simulation. The exchange of boundary conditions has lead to more realistic as well as more complex simulations with usually slower convergence rate when the coupling is being performed between two different codes. In this paper the equations of local sensitivities for element centered steady-state combined convection, conduction, and thermal radiation problems are being derived along with some implementation details. A numerical analysis on the stability of the solution matrix is being conducted. The relative importance of the heat transfer modes at various locations are investigated by their uncertainty factors and conclusions are being drawn.
Bioremediation of oil spills on beaches commonly involves the addition of nutrients to stimulate the growth of indigenous oil-degrading bacteria. The selection of the best application strategy of nutrients requires an understanding of the physical factors affecting beach hydraulics and hydrodynamics. The authors investigated these factors here using a laboratory beach and a numerical model that is able to simulate density-dependent flows in two-dimensional variably-saturated media. The authors found that beach geometry plays a major role in beach hydraulics and hydrodynamics because the flow lines are perpendicular to the beach surface. Under tidal action, the authors found that seawater enters the beach from the top and causes the entrapment of less saline water in the beach. Guidelines for the selection of the best application strategy of nutrients are provided.
In recent years, significant effort has been placed into developing automated multi-physics simulation. The exchange of boundary conditions has lead to more realistic as well as more complex simulations with usually slower convergence rate when the coupling is being performed between two different codes. In this paper the equations of local sensitivities for element centered steady-state combined convection, conduction, and thermal radiation problems are being derived. A numerical analysis on the stability of the solution matrix is being conducted. Partial uncertainties and the relative importance of the heat transfer modes are investigated by their uncertainty factors and conclusions are being drawn.
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