3.6. Set Up Parameters When Restarting a Simulation

Once you save a copy of your partially processed simulation (see also Save a Copy of a Partially Processed Simulation for Restart Purposes), you are able to change or delete existing boundaries and/or Particle sets as well as add new ones.

However, to preserve the integrity of the original simulation, Rocky limits the setup parameters that you can change for existing geometries and Particle sets to only a select few.

What would you like to do?

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View Frequently Used Tasks

3.6.1. About Changing Geometries and/or Particles When Restarting a Simulation

After saving a copy of a partially processed simulation for restart purposes (see also Save a Copy of a Partially Processed Simulation for Restart Purposes), you can add additional geometries and Particle sets but will be unable to change some settings for existing geometries, inlets, and particles due to the way they affect the calculations that are already in process. Most other settings will be unaffected in the copy and can be modified as usual (Table 1).

Note: If you have saved for restart purposes a copy of a partially processed simulation that had both breakage enabled and broken fragments within the simulation at the time you saved your copy, the fragments will not be present in the copy you want to restart due to a limitation between the features. However if you choose to restart processing the simulation copy, breakage should work in the newly processed output times. (See also Enable Particle Breakage Calculations.)

See the sections below for further detail on what settings and parameters are editable within a copy of a partially processed simulation.

3.6.1.1. Changing Particle Inputs When Restarting a Simulation

Since any Volume Fill Input will inject all of its particles immediately after the simulation begins, and a simulation must have particles in it to be saved for restart, the particles injected from a Volume Fill input will still appear in the copy. However, because the injection has already completed, the settings for any existing Volume Fill inputs will be disabled. You are able to add new Volume Fill inputs or duplicate any existing Volume Fill inputs as needed.

Any Continuous Injection or Custom Inputs (see also About Adding and Editing Particle Inputs) you had in the original simulation that were active at the time the copy was saved will still appear in the copy. And while these copied inputs and the Particle sets assigned to them cannot be removed from the copy, there are ways you can disable them if you no longer want to use them in the simulation moving forward.

Tips:

If you do not want an individual Particle set within a copied Continuous Injection input to be released in the simulation copy, you can set the Mass Flow Rate of that Particle set to zero.
If you have set all of the Particle sets within an individual Continuous Injection input to have zero as their Mass Flow Rates, you may choose to include a second Particle Input using the same Entry Point as the first, as long as all of the Mass Flow Rates in the first Input are zero, and all the Mass Flow Rates in the second Input are greater than zero.

3.6.1.2. Changing Motion Frames When Restarting a Simulation

Any Motion Frames (see also About Creating and Applying Motion Frames) you had in the original simulation that were active at the time the copy was saved will still appear in the copy and will retain their original geometry assignments. However, even though the geometries using the frames can be removed, the copied frames themselves cannot be removed from the copy, and will also only allow changes to the Stop Time field for the existing motion (as long as the copied motion hasn't completed yet, meaning the Stop Time value is positive); new motions can be added to the existing frame, however, by clicking the Add Motion button. In addition, only new motion frames can be assigned to new geometries in the copy; newly added geometries cannot be assigned frames copied from the original simulation, and geometries with motion frames copied from the original simulation cannot be assigned newly added motion frames.

Tips:

If you do not want a copied motion to occur in the copy, or want to define a new kind of motion for the copied geometry that is assigned the copied frame, you can set the Stop Time of the copied motion in the copied frame to zero (0), and then create a new motion (click the Add motion button) within the existing frame if desired. Note: Setting the Motion Frame Stop Time to zero (0) disables the field from being changed further. If you need to edit the Stop Time, press the Undo button (see also Undo or Redo a Single Action at Once) to re-enable the field.
If you want to change the motion assignment of an existing geometry, import a new copy of the geometry, create a new motion frame, and then assign the new motion frame to the new geometry. You can then delete the old geometry if you choose.
If you want to assign a copied motion to a newly added geometry, make a copy of the old motion frame and then assign that to the new geometry.

3.6.1.3. Editable Settings When Restarting a Simulation

The following table attempts to document what Rocky settings are able to be changed in a copy of a partially processed simulation.

Table 1: Editable Settings When Restarting a Simulation

DATA PANEL SECTION	EDITABLE SETTINGS	CONDITIONS/NOTES	SEE ALSO
STUDY
Study	All settings are editable.	None.	About Study Parameters
PHYSICS
Physics	All settings are editable.	None.	About Physics Parameters
GEOMETRIES
Feed Conveyor; Imported Geometry	Just the Thermal Boundary Type.	For existing feed conveyors and imported geometries.	About Feed Conveyor Parameters ;
Feed Conveyor	Just the Belt Profile settings (excluding the number of rolls) and the Belt Motion settings.	For existing feed conveyors that have released particles.	About Feed Conveyor Parameters
Feed Conveyor; Inlet	All settings are editable.	For feed conveyors or inlets that have not yet released particles.	About Feed Conveyor Parameters; About Inlet Parameters
Receiving Conveyor	All settings are editable.	None.	About Receiving Conveyor Parameters
Imported Geometries	Material Disable Time Mass settings Wear settings (excluding disabling them if they were enabled in the original file).	Only these settings can be edited on already imported geometries. However, for newly imported geometries all settings are editable.
MOTION FRAMES
Motion Frames	Just the Stop Time.	For any existing motion of an existing Motion Frame that is in process or has yet to happen.	About Creating and Applying Motion Frames
MATERIALS
Materials	All settings are editable.	None.	About Modifying Material Compositions
Materials Interactions	All settings are editable.	Editing these settings will affect the previously released particles what may lead to unrealistic behavior. Please, evaluate the results carefully.	About Modifying Materials Interactions and Adhesion Values
SPH
SPH	Turbulence Type; Viscosity Type; Surface Tension Type (and sub parameters); Boundary Type; Positions Correction Type.	None.
SPH > Eulerian Solution	Enable Eulerian Solution.	None.
Fluid Inlet	Just the Stop Time.	None.
Outlet	All settings are editable.	None.
PARTICLES
Particles	Just the Rolling Resistance; and the Enable Rotations.	Only these settings can be edited on existing particles. However, for newly particles all settings are editable.	About Adding and Editing Particle Sets
PARTICLE INPUTS
Continuous Injection	Just the Stop Time.	For existing inlets and feed conveyors that have released particles, as long as the Stop Time value is greater than the original simulation time represented by the current output time.	About Adding and Editing Particle Inputs
CFD COUPLING
CFD Coupling	All settings are editable.	None.	Set or Modify Fluid and/or Air Flow Properties
DOMAIN SETTINGS
Domain Settings	All settings are editable.	None.	About Domain Settings Parameters
SOLVER
Solver	All settings are editable.	None.	About Solver Parameters
PARTICLES CALCULATIONS
Particles Calculations	All settings are editable.	None.	About Particles Calculations
USER PROCESSES
User Processes	All settings are editable.	None.	Filter Views and Data with User Processes
COLOR SCALES
Color Scales	All settings are editable.	None.	About Color Scales

Note: If you need to modify any of the above settings, saving a copy of the processed simulation might not work for you. Instead, return to your original simulation and reset it before changing any of the above parameters.

What would you like to do?

Change Geometries and/or Particles When Restarting a Simulation

See Also:

Change Set Up Parameters When Restarting a Simulation

3.6.2. Change Geometries and/or Particles When Restarting a Simulation

Process and save part of a processed simulation. (See also Save a Copy of a Partially Processed Simulation for Restart Purposes.) The copy will open with the Time toolbar slider reset to zero (0). However, the simulation will be processed to the last output time that you selected in the original simulation.
Using the lists of what you can and cannot change for guidance (see also About Changing Geometries and/or Particles in a Partially Processed Simulation), change and/or delete existing boundaries, add new boundaries, and/or add new Particle sets as you want.
Process and analyze the simulation as you normally would.

See Also:

View Frequently Used Tasks