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ABAQUS simulation - effects of excavation on groundwater, please help

ABAQUS simulation - effects of excavation on groundwater, please help

(OP)
Hi everyone,

I need to model something with ABAQUS and I'm new to it and need help. I need to model the effects on groundwater levels, of excavating a large space underground(the water levels will be affected because groundwater will flow into that space, which is continually kept empty with pumps).

Here are my questions:

Will standard&explicit be enough, or do I need to use CFD?
How do I set the intial groundwater level(which is already sloping to begin with), and have ABAQUS calculate the resulting groundwater level after the excavation step?
How to remove a chunk of soil(as the excavation step) - (I've seen people mention MODEL CHANGE - REMOVE, but I have no idea how to do that and no one describes explicitly how to do that)

I know these questions probably sound really easy but I'm completely new to ABAQUS and really need help. All and any input would be much appreciated, thank you very much!

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