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Incompressible Navier-Stokes (INS) equations are a model for incompressible flows:
Chombo simulates incompressible flows using projection algorithms, which enforces the divergence-free constraint with the solution to an elliptic equation based on a Hodge Decomposition:
This flexible approach has been extended to a number of other regimes, including Low-mach number and All-speed asymptotics of Compressible Navier Stokes with embedded boundaries..
There are 3 software libraries that support INS:
In addition, we are currently working on a 4th-order accurate AMR INS solver on rectangular domains. For more details see the Current Research page.
Karman vortex street behind a cylinder at Re=300, using the EBAMRINS code. Different levels of refinement are used to minimize dissipation of the vortex street. See David Trebotich's page for a movie and more information.