Solution Monitor

The Solution Monitor provides you with information from the solver during the analysis in the following solver environments:

• Simcenter Nastran

• Simcenter Samcef

• Simcenter 3D Multiphysics

• Simcenter 3D Thermal/Flow

• Simcenter 3D Space Systems Thermal

• Simcenter 3D Electronic Systems Cooling

• Simcenter 3D Acoustics BEM

During the solve, you can also search the information that is displayed in the Solution Monitor.

Multiphysics solver environment

When you run one of the following coupled Multiphysics analyses, the Solution Monitor displays text output from each solver on a separate tab:

• Coupled Thermal-Structural

• Coupled Flow-Structural

• Coupled Thermal-Flow-Structural

Tab	Solver
Simcenter 3D Multiphysics	Coupled solver
Simcenter 3D Thermal/Flow	Thermal solverFlow solver
Simcenter Nastran	Structural solver

Displayed information

Depending on the solution type, the following information is displayed:

• Solver version, running time, and run directory folder name.

• Model summary. For example, for thermal and flow solutions, this summary includes the number of entities, ambient conditions, internal mesh check, and boundary conditions.

• Status of the solution and current module being executed by the thermal solver.

• Convergence residuals at each iteration during the analysis.

• Contact and material status of the number of nodes in contact.

• Material status of the number of plastic, creep, or damaged elements.

• Energy evolution.

• Evolution of displacement as a function of time for selected nodes and components.

• Warnings and errors.

Depending on your solver environment, you can request several other types of graphs to display in the Solution Monitor. For more information, see Displaying graphs in the Solution Monitor using the Report simulation object.

Terminating or stopping the analysis

The Abort command terminates the analysis. The software removes all temporary files and does not post process the results. You cannot restart or continue aborted solutions.

Note:

Not available for Simcenter Nastran solutions.

The Stop command stops the analysis before the end. The software keeps temporary files, performs results post-processing, and creates results output files. You can restart a stopped solution.

Note:

• Available for flow or thermal-flow solutions, or for Simcenter Nastran SOL 402. You cannot terminate or stop other analyses in the Simcenter Nastran solver environment.

• To restart SOL 402, use a restart solution as explained in External restarts.

Generating an intermediate results file

The Get Results command generates an intermediate results file that contains the requested output results computed so far during the solve. When you choose this command:

1. The solver proceeds until the next converged iteration, time step, or the end of the current subcase.

2. The computation pauses while the software generates the file with the requested output results.

3. The solver resumes until you request intermediate results again or it reaches the end.

During steps 1 and 2, the Get Results command is unavailable. A new intermediate results file is generated each time you click the Get Results command.

The intermediate results file is generated with the following file name and displayed on the appropriate tab:

• For thermal flow steady-state solutions, -iteration.bun

• For thermal flow transient solutions, -increment.bun

• For SOL 402, -step.op2

To view the intermediate results in post-processing, in the Post Processing Navigator, right-click Imported Results node and choose Import Results.

Note:

Available for flow or thermal-flow solutions, or for Simcenter Nastran SOL 402. You cannot terminate or stop other analyses in the Simcenter Nastran solver environment.

For a flow or coupled thermal-flow solutions, use the parallel flow solver.

For SOL 402, the Get Results command is available with a 64-bit OP2 file. If you request a 32-bit OP2 file to reduce the output file size, the command is not available. For information on setting the OP2 file format, see ILP-64 executable file formats.

To restart SOL 402, use a restart solution as explained in External restarts.

Monitoring real-time solution results during the solve

Use the SC Monitor command to display real-time instantaneous results in the Solution Control Monitor. You can evaluate the results on your model, while they are computed by the solver, in the Solution Control Monitor graphics window.

During the analysis, you can:

• Examine results on clipped planes, or probe individual node results. For velocity results, you can use arrows or streamlines to track how the fluid is moving in the flow domain.

• Modify thermal and flow convergence criteria that the solver uses at the next iteration of the solve.

For more information, see Solution Control Monitor.

Note:

Not available for Simcenter Nastran solutions.

Keeping the monitor open

The Solution Monitor closes after approximately 15 seconds if you do not click Yes when the solve finishes, regardless of whether the solve was successful. To keep the monitor open until you click No, set the following environment variable:

XMON_STAY_OPEN=1

The Solution Monitor is based in part on the work of the Qwt project (

Where do I find it?

Application	Pre/Post, Design Simulation
Prerequisite	Simcenter Nastran, Simcenter Samcef, Simcenter 3D Multiphysics, Simcenter 3D Thermal/Flow, Simcenter 3D Space Systems Thermal, Simcenter 3D Electronic Systems Cooling or Simcenter 3D Acoustics BEM as the specified solver
Command Finder	Solve
Simulation Navigator	Right-click an active solution node→Solve

How do I

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Solution Monitor, Simcenter 3D 2021.1 Series

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