Hello, 
I am trying to simulate the Hydraulic fracturing operation using the XFEM in Abaqus.
A pre-existing perforation is subjected to fluid flow is performed like the image(1) attached so we can capture crack propagation.
 
However, to observe crack propagation, the element in which there is a pre-existing crack should be initially opened like image(2), so the fluid will be allowed to enter the perforation.

The default gap value is 0.002 so at 1 sec, the PFOPENXFEM which the initial width is equal to 0.002.

My question is, how we can change this default value (0.002)?
I followed the instruction in the manual and the example that is available in the documentation.
They mentioned in the example the following:

*Solid Section, elset=solid_eall, material=Material-1, CONTROLS=CTR
**SECTION CONTROLS,NAME=CTR,INITIAL GAP OPENING=0.002
** 

But, if I changed the initial Gap opening here, it will remain the same after running the job.

I appreciate your help.
Best,