Verification of multiphysics software: Space and time convergence studies for nonlinearly coupled applications Conference Paper uri icon


  • High-fidelity modeling of nuclear reactors requires the solution of nonlinear coupled multi-physics stiff problems with widely varying time and length scales that need to be resolved correctly. A numerical method that converges the implicit nonlinear terms to a small tolerance is often referred to as nonlinearly consistent (or tightly coupled). This nonlinear consistency is still lacking in the vast majority of coupling techniques employed today. We describe a tightly coupled multiphysics framework that tackles this issue and present code verification and convergence analyses in space and time for several models of nonlinear coupled physics.

author list (cited authors)

  • Mahadevan, V., Ragusa, J. C., & Mousseau, V.

publication date

  • December 2009