Define Constant Injection Pressure
Dear all members,
I tried to model water injection with defining constant pressure instead of constant injection rate in ECO2N but I encountered no changes in the model.
based on manual examples, in order to define the constant pressure, I changed the pressure of injection elements in the initial condition and fixed their volume in ELEME part.
I would be grateful if someone can help me on this issue?
What did you change the volumes of the injection elements to? It would have to be something very large (typically on the order of 1E50) to achieve the Dirichlet boundary condition you're trying to set up. Another alternative would be to make these elements inactive by placing them at the end of the ELEME list, following the entry of a dummy element with zero volume. See page 63 of the User's Guide ( http://esd1.lbl.gov/files/research/projects/tough/documentation/TOUGH2_V2_Users_Guide.pdf ).