Is there a limit of injection rate that an element can accept?

Hi, I am running a 2-D planar, unidirectional flow with injection and production at both ends (actually, simulating an aquifer).

But I found if I increase the injection rate more than a certain value, the model is not converging. So, is there a limit of injection rate at which the elements cannot accept the fluid?

 

The other minor question about the flow is,

I know I can assign a large volume instead of production cell to make the flow. But I found that each case has a different pressure gradient along the aquifer.

In this case, which method is more suitable to simulate the surficial aquifer?

Thank you.

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  • Jaeshik,

    Without knowing more details about your simulation, it's difficult to diagnose your issue.  It's possible that by increasing the injection rate too much on the upstream end the pressure in that element is exceeding the maximum allowable pressure TOUGH is configured to model.

    Could you also clarify what you mean by "each case" in your other question?  Are you putting together multiple simulations, each requiring a different initial pressure gradient as an initial condition?  Or do you mean something else?

    Thanks!

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