Restarting a solution using the parallel flow solver

The parallel flow solver backup files are flow.restart and flow.struct. They contain all the necessary information for restarting the simulation from the point at which the backup files were updated. The information they contain includes, but is not limited to, flow field variables, mass flow rates, and gradient vectors. The software creates the files in same run directory that contains all the other flow solution files.

Note:

You cannot restart solutions using the parallel flow solver that were solved using the parallel flow solver from NX 9 or earlier, or using the serial flow solver.

Supported modifications to the model

You cannot modify the original mesh of the model for which you want to restart the solution. You can however make the following changes to your solution:

• Add meshed geometry or flow enclosures as long as the original mesh is not altered in anyway, for example, by reordering nodes or elements.

• Add or remove boundary condition simulation objects and modify the boundary condition values.

• Modify the time step size, relaxation factors, time integration accuracy, and advanced parameters.

• Change the turbulence model and the flow type, for example, from incompressible to high speed flow.

• Change the number of processes for a parallel run.

How do I

Continue a transient solution

Restart a steady state solution

Reuse thermal solution data in a modified or different solution

Learn more

Restarting a solution using the thermal solver

Restarting a solution using the serial flow solver

Solving the model

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Restarting a solution using the parallel flow solver, Simcenter 3D 2021.1 Series

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