what are types of boundary condition for simulating of pollution transport in Mt3dms of GMS software?
I made a transport model in GMS but i dont put any boundary condition in my model and just there is a source with variable time mass loading that set in sink/source mixing packages. Then I run the model and it showed distribution of pollution source in domain.
I want to know, what boundary condition for concentration supposed in model's boundaries as default?
can we set Dirichlet/Cauchy or Neumen boundary conditions for pollution concentration in a model boundaries? how it is possible?
Any experience or suggestion will be very appreciated.
Azade
Azade
Developing an MT3DMS model definitely requires setting up both boundary and initial conditions for both head and concentration. Now, Whether you need to assign a Dirichlet or a Neumann boundary anywhere in your model depends on how you conceptualize the model which is the first thing you need to do before you start developing the numerical model.
Hope this helps.
Good luck
Your modelling is correct. You do not need to specify any boundary condition for the walls or borders of your model domain. As long as there is at least one sink and one source in the model, there will be flow in the model. All the rest of model domain borders, which are in fact the edges of the spatial mesh, are naturally defined as "no-flow" boundary condition. In respect to concentration, you can call this "zero-flux" boundary condition.
Peyman Babakhani
Thank you for your reply,
do you mean zero-gradient boundary condition (dc/dx=0 c is concentration)?
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