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Boundary conditions: Difference between revisions

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'''Boundary conditions''' allow one to constrain the physics along boundaries in the model.  They are similar to [[initial conditions]], which specify the model state at start time.  As an example, at the walls of a bathtub, the flow normal to the walls is zero since they are impermeable.  For general information on the topic, see the [https://en.wikipedia.org/wiki/Boundary_value_problem Wikipedia article].  Note that the sea surface and sea floor (i.e. the top and bottom of the water mass) are also boundaries, though these are not addressed here.  Since ADCIRC solves for water elevations and velocities (fluxes), typically some aspect(s) of these two quantities is what is constrained in a boundary condition.   
'''Lateral boundary conditions''' allow one to constrain the physics along boundaries in the model.  They are similar to [[initial conditions]], which specify the model state at start time.  As an example, at the walls of a bathtub, the flow normal to the walls is zero since they are impermeable.  For general information on the topic, see the [https://en.wikipedia.org/wiki/Boundary_value_problem Wikipedia article].  Since ADCIRC solves for water elevations and velocities (fluxes), typically some aspect(s) of these two quantities is what is constrained at the lateral boundaries.   


== Flux Boundaries ==
== Flux Boundaries ==

Revision as of 18:42, 27 January 2020

Lateral boundary conditions allow one to constrain the physics along boundaries in the model. They are similar to initial conditions, which specify the model state at start time. As an example, at the walls of a bathtub, the flow normal to the walls is zero since they are impermeable. For general information on the topic, see the Wikipedia article. Since ADCIRC solves for water elevations and velocities (fluxes), typically some aspect(s) of these two quantities is what is constrained at the lateral boundaries.

Flux Boundaries

For details on flux boundary conditions, see flux specified boundaries.

Elevation Boundaries