Hi everyone

Recently I set up a model to simulate density-denpent flow model with ogs5.8.The numerical model is like the goswami problem in benchmark. For sensitivity analysis of the model, I changed the permeability and found that the shape and size of the salt water wedge did not change.This is not consistent with the conclusion in many papers, and then I also carried out sensitivity analysis on the permeability in goswami’s model, and found that the toe length and shape of the brine wedge also did not change. I don’t know what went wrong, but my guess is that the left and right boundaries are constant heads (i.e., the first type of boundary condition) in goswami’s model, I don’t know how to set up to perform sensitivity analysis successfully, Is anything wrong with Richard’s equation? Can you help me with this question? Thank you very much！

Thank you for any hint in advance