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Investigate convergence failure by Rosenbrock solver using Chapman #156

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boulderdaze opened this issue Jun 21, 2024 · 1 comment · Fixed by #192
Closed

Investigate convergence failure by Rosenbrock solver using Chapman #156

boulderdaze opened this issue Jun 21, 2024 · 1 comment · Fixed by #192
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@boulderdaze
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boulderdaze commented Jun 21, 2024

musica::SolverStats using Chapman returns the following profile indicating convergence failure

Solver state: Convergence Exceeded Max Steps
Function Calls: 1997
Jacobian updates: 996
Number of steps: 1001
Accepted: 996
Rejected: 1
Decompositions: 1001
Solves: 3003
Singular: 0
Final time: 0.290802

After M is labeled as "THIRD_BODY"

Solver state: Convergence Exceeded Max Steps
Function Calls: 1995
Jacobian updates: 994
Number of steps: 1001
Accepted: 994
Rejected: 1
Decompositions: 1001
Solves: 3003
Singular: 0
Final time: 0.246266

Acceptance Criteria
Should achieve a converged solution

  • MUSICA example configuration should use THIRD_BODY species for M

Ideas
The tests might have to be updated to set the air density

  • "M" species needs to be set to the new "THIRD_BODY" type
@boulderdaze
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Specifying THIRD_BODY for M doesn't fix the issue.

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