coupled_solve

A ready-made coupled setup for common pairs of physics.

Group: Two solvers on one problem.

Parameters

Parameter	Type	Required	Default
problem	string	no	'heat_dd'
solver_a	string	no	'fenics'
solver_b	string	no	'fourc'
nx	integer	no	32
ny	integer	no	32
max_iter	integer	no	20
tol	number	no	1e-06
relaxation	number	no	1.0
params	string	no	'{}'
critic_approved	boolean	no	False

What the model reads

The text below is the tool's own description, exactly as the AI model receives it.

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LEGACY cross-solver coupling — FIXED toy geometries only. PREFER `couple`.

DEPRECATED: this tool only handles a fixed enum of benchmark problems on a
hardcoded unit-square split at x=0.5 (heat_dd/poisson_dd/one_way/tsi_dd/...).
For ANY real or non-benchmark coupling use the general `couple` tool, which is
physics-agnostic and validates the result for silent-wrong (flux balance,
convergence, finiteness). Only use coupled_solve to reproduce the legacy
benchmarks.

Domain A (Dirichlet at interface) supports: fenics, ngsolve, skfem, dune.
Domain B (Neumann at interface) supports: fenics, fourc, ngsolve, skfem, dune.
Any combination of these works for heat_dd and poisson_dd problems.

Args:
    problem: 'heat_dd', 'poisson_dd', 'one_way',
             'poisson_dd_study', 'l_bracket_tsi', 'heat_dd_precice'.
             'tsi_dd' is REMOVED: it reported converged=True,
             iterations=1, residual=0.0 on a run that did one thermal
             solve and one one-way structural solve and never fed
             anything back. Two-way TSI goes through `couple` — see the
             shipped participant_tsi_* scripts.
    solver_a, solver_b: Backend names
    nx, ny: Elements per direction
    max_iter: Max iterations
    tol: Convergence tolerance
    relaxation: Under-relaxation parameter
    params: JSON with additional parameters
    critic_approved: Set True after critic review