Solver Setting - SS Finder

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Navigation: User Guide ➔ Menu Commands ➔ View ➔ Solver Settings ➔ SS Finder

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FS_Solver ProBal Dynamic Method Scenario Spills Vents SS Monitor SS Finder Convergence GlobalTear Tears TearTags Tolerances Analysis Changes

This page is only available in Build139.31800 and later.


This tab page is only visible if "SSF.On" tickbox is check on the Dynamic Tab.

User can set some criteria for the checking of Temperature, Pressure, Mass and MassFlow change in the project.

  • If the project is set to run to steady state (either from the Solver Setup or Scenario type), the criteria entered on this page will be used to stop the scenario run once the conditions have been met.
  • If the project is not set to run to steady state, user can still use the Solver Setting - SS Monitor page to track the worst changes.
Tag (Long/Short) Input/Calc Description
Steady State Finder (SSF) - Solve to Steady State
SSF...
Finder Options
On Tickbox Toggles the SS Finder on/off.
StopCount Input Consecutive steady steps required to stop. The number of continuous steps that the network must be steady before SysCAD will stop.
MaxSteps Input The solver will stop after MaxSteps – regardless. If this value is -1 SysCAD will keep running indefinitely.
TagCount Input The number of Tags being displayed on the page.
Finder Options
Step Display The number of steps to date.
SteadyCount Display The number of consecutive steps that the ‘Steady State’ criteria have been satisfied.
Finder Variables
T (Temperature) ...
Test None Do not do any temperature tests.
Flows Apply the temperature test to all flows.
Content Apply the temperature test to all contents.
Flows/Content Apply the temperature test to all flows and contents.
Rel Input Relative tolerance on temperature change.
Abs Input Absolute tolerance on temperature change.
Steady Display Only visible if T.Test is NOT None. The number of consecutive steps that the ‘Steady State’ temperature criteria have been satisfied.
P (Pressure) ...
Test None Do not do any pressure tests.
Flows Apply the pressure test to all flows.
Content Apply the pressure test to all contents.
Flows/Content Apply the pressure test to all flows and contents.
Rel Input Relative tolerance on pressure change.
Abs Input Absolute tolerance on pressure change.
Steady Display Only visible if P.Test is NOT None. The number of consecutive steps that the ‘Steady State’ pressure criteria have been satisfied.
M (Mass (Content)) ...
Test None Do not do any mass tests.
TotalMass Apply the mass test to the total mass.
Species Apply the mass test to individual species.
IndSpecies Apply the mass test to a specific individual species. The user selects the species in the field following this one.
TotalMass/Species Apply the mass test to the total mass and individual species.
TotalMass/IndSpecies Apply the mass test to the total mass and to a specific individual species. The user selects the species in the field following this one.
TestSpecies / TestSp List This is only visible if the user has chosen IndSpecies or TotalMass/IndSpecies for M.Test. The user selects the individual species to be tested from a drop down list of all species in the project.
Rel Input Relative tolerance on mass change.
Abs Input Absolute tolerance on mass change.
Steady Display Only visible if M.Test is NOT None. The number of consecutive steps that the ‘Steady State’ mass content criteria have been satisfied.
Qm (MassFlow (Stream)) ...
Test None Do not do any mass flow tests.
TotalQMass Apply the mass flow test to the total mass flow.
Species Apply the mass flow test to individual species flows.
IndSpecies Apply the mass flow test to a specific individual species flow. The user selects the species in the field following this one.
TotalQMass/Species Apply the mass flow test to the total mass flow and individual species flows.
TotalQMass/IndSpecies Apply the mass flow test to the total mass flow and to a specific individual species flow. The user selects the species in the field following this one.
TestSpecies / TestSp List This is only visible if the user has chosen IndSpecies or TotalQMass/IndSpecies for Qm.Test. The user selects the individual species to be tested from a drop down list of all species in the project.
Rel Input Relative tolerance on mass flow change.
Abs Input Absolute tolerance on mass flow change.
Steady Display Only visible if Qm.Test is NOT None. The number of consecutive steps that the ‘Steady State’ mass flow criteria have been satisfied.
V ...
A table (rows = TagCount) will be shown which displays the largest changes in the project with the following columns:
  • VariableTag
  • Previous: previous value
  • Current: current value
  • Change: absolute change = Current-Previous
  • RelChange: relative change = Change/Previous