Hydraulic Fracturing Simulation Fails to Converge with GPU-Accelerated Hypre MGR Solver

[liyangrock]

Describe the bug

The hydraulic fracturing simulation fails to converge when using the GPU-accelerated hypre mgr solver.

Steps to Reproduce

1. Run the kgd_mgr.xml file with GPU-accelerated GEOS (fails to converge).
2. Run the kgd_mgr.xml file with serial GEOS (converges).
3. Run the kgd_direct.xml file with GPU-accelerated GEOS (converges).
4. Run the kgd_direct.xml file with serial GEOS (converges).

The difference between the kgd_mgr.xml and kgd_direct.xml files lies in the LinearSolverParameters within Hydrofracture.

The issue may be related to the GPU-accelerated mgr solver. The kgd_mgr.xml file uses the mgr solver and fails to converge, while the kgd_direct.xml file uses the direct solver and converges successfully.

Platform:

• Machine Ubuntu 22.04
• Compiler: gcc 11.4.0
• CUDA: 11.8.89
• GEOS Version: latest develop branch

kgd_direct.xml.txt
kgd_mgr.xml.txt

Remove the ".txt" extension from the file name before executing.