Hello Everyone,

I am trying to develop a model that can simulate the subcutaneous injection. I generated a 2D model of three layers as shown in the figure. I defined the injection of fluid into a porous cohesive layer (mid layer) using the "definition of constitutive parameters for tangential flow in pore pressure cohesive elements. I have few doubts about the model definition:

1) Being the top layer and bottom layer not porous (because I don't want the fluid to penetrate there), do I have to define the fluid leakoff coefficient equal to 0?

2) I would like also to apply an Hydrostatic pressure on the top elements. However, when I tried to apply it abaqus give me the error ("Hydrostatic elements cannot be used with pore pressure elements"), do you have any suggestion on how can I model it ?

3) Do you think there is a better way other than the use of porous cohesive elements to model this kind of problem ?

The video shows the concentrated fluid flow defined in the initial gap.

Thank you in advance for your help.

Abaqus ​​​​​​​