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https://github.com/OPM/opm-simulators.git
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hnil
e48ea4a225
Introduce a prototype for solving the reservoir and well degrees of freedom as a single coupled linear system. This complements the existing approach of handling wells separately through Schur complement elimination. Key design choices: - The linear solve operates on the full coupled system (reservoir + well DOFs) to simplify the solver architecture and reduce special-case well handling - The underlying solver uses standard sparse matrices with no well-aware operators, improving modularity and reducing code complexity - The included preconditioner is configurable to reproduce standard CPR behavior, providing a baseline for validation before further performance tuning - An approximate well-block solve is supported for potential performance gains Important changes: - Add linear solver implementation with coupled system support - Configure preconditioner to match existing CPR behavior for correctness - Remove need for separate well-block elimination in the linear solve path - Update solver selection to allow --linear-solver=system_cpr option This implementation serves as a prototype to validate the coupled system approach before further optimization and benchmarking.
41 lines
1.1 KiB
JSON
41 lines
1.1 KiB
JSON
{
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"maxiter": "20",
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"tol": "0.005",
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"verbosity": "0",
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"solver": "bicgstab",
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"preconditioner": {
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"type": "system_cpr",
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"reservoir_smoother": {
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"maxiter": "1",
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"tol": "0.005",
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"verbosity": "0",
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"solver": "preconditioner2inverseoperator",
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"preconditioner": {
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"type": "paroverilu0",
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"relaxation": "1"
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}
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},
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"reservoir_solver": {
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"maxiter": "1",
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"tol": "0.005",
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"verbosity": "0",
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"solver": "preconditioner2inverseoperator",
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"preconditioner": {
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"type": "cpr",
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"relaxation": "1",
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"use_well_weights": "false",
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"add_wells": "false",
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"weight_type": "trueimpes",
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"pre_smooth": "0",
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"post_smooth": "0"
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}
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},
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"well_solver": {
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"maxiter": "1",
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"tol": "0.005",
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"verbosity": "0",
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"solver": "umfpack"
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}
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}
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}
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