For time-dependent, and evolution calculations, you can ask Ansys Polyflow to save the output files (mesh and solution data, discussed in Exporting Mesh and Solution Data, or probe data, discussed in Saving Data at a Specified Point) at specified intervals during the calculation. This will allow you to examine the progress of the solution, and study the time or evolution history of solution variables.
The interval for saving output files is specified in Ansys Polydata as follows:
In the top-level Ansys Polydata menu, select the Outputs menu item.
Outputs
Select the Output Triggering menu item.
Output Triggering
This menu item will appear only for time-dependent or evolution problems.
Specify when Ansys Polyflow should save the output files. There are five options:
-
Output at initial state will save the
initialized state of the simulation (state prior to beginning the
calculation). This allows you to check the initialization state of
an old results file and is useful for both transient and evolution
type simulations.
-
Output after N valid steps will save the output
after every
time steps or evolution steps. After you select
this option, choose Enter the number of steps
to specify the value of 
. For example, if you specify
, Ansys Polyflow will save the output files after
every 10 time steps or evolution steps. -
Output after dt or Output after
ds will save the output at intervals greater than or
equal to a specified time or evolution-variable interval. After you
select this option, choose Enter the dt
interval or Enter the ds
interval to specify the value of the time interval or
the evolution-variable interval.
For example, if you specify dt=0.02 or ds=0.02, Ansys Polyflow will save the output files when the difference between the current time (or evolution-variable value) and the time (or evolution-variable value) of the last output is greater than or equal to the specified interval.
-
Output at exact dt or Output after
ds will save the output at intervals exactly equal to
a specified time or evolution-variable interval. After you select
this option, choose Enter the dt interval or
Enter the ds interval to specify the value
of the time interval or the evolution-variable interval.
For example, if you specify dt=0.02 or ds=0.02, Ansys Polyflow will save the output files when the difference between the current time (or evolution-variable value) and the time (or evolution-variable value) of the last output is exactly equal to the specified interval.
Using this option will force the solver to compute a solution at
, 
, 
, etc., if this computation has not already been
performed. If you do not need the results at such specific
intervals, it may be better to use the Output after
dt or Output after ds option,
which will not require any additional calculations. -
Output at exact t (or s) values will save the
results at the set of time (or evolution-variable) values specified
by you. To specify the values, select Modify list of t (or
s) values option. The results will be saved only at
the specified values.
