Multiphysics Platforms — COMSOL, Ansys & OpenFOAM Coupling
Monolithic vs. partitioned multiphysics coupling, co-simulation frameworks (preCICE, Ansys System Coupling), workflow automation, and platform selection.
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Quick Explainer
What is the difference between monolithic and partitioned multiphysics coupling?
Monolithic coupling assembles all physics into one large matrix and solves simultaneously — strongly coupled with excellent convergence but requiring specialized software. Partitioned coupling uses separate solvers for each physics, passing boundary data between them. Partitioned is more flexible (best solver for each physics) but convergence depends on the coupling algorithm.
How do you choose between a monolithic platform (COMSOL) and partitioned co-simulation?
COMSOL's monolithic approach excels for tightly coupled physics (piezoelectric, electrochemical-thermal) where fields interact strongly everywhere. Partitioned approaches (Ansys System Coupling, preCICE) let you use specialized solvers — best CFD with best structural FEM. Choose monolithic for tight coupling formulated in the same framework; partitioned when you need specialized solvers or coupling is weaker.