Time Step Error while doing Steady State Simulation

ThePhoton · April 27, 2016, 13:09

Hello,

We are doing a steady state simulation but this time step error is constantly coming up... Can you tell us the fix for this?

Error:

cal_TSUP1_BOUNDS WARNING:
Upper bounds changed for heat partition algorithm 29 times.
This does not adversely affect the results, but it may indicate that your time
step is too large. If this persists, and if you experience poor convergence,
then please try reducing the time step.

evcelica · April 27, 2016, 14:03

Steady state uses auto time step by default. It will tell you the time step size for all equations in the out file. Just set a maximum time step in solver control in CFX-Pre, or change to a physical time step. There is more info on this in the documentation. Try looking in the "Solver modeling guide" or "CFX-Pre user guide"

April 27, 2016, 13:09	Time Step Error while doing Steady State Simulation	#1
ThePhoton New Member Join Date: Oct 2015 Posts: 5 Rep Power: 10	Hello, We are doing a steady state simulation but this time step error is constantly coming up... Can you tell us the fix for this? Error: cal_TSUP1_BOUNDS WARNING: Upper bounds changed for heat partition algorithm 29 times. This does not adversely affect the results, but it may indicate that your time step is too large. If this persists, and if you experience poor convergence, then please try reducing the time step.

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April 27, 2016, 14:03		#2
evcelica Senior Member Erik Join Date: Feb 2011 Location: Earth (Land portion) Posts: 1,167 Rep Power: 23	Steady state uses auto time step by default. It will tell you the time step size for all equations in the out file. Just set a maximum time step in solver control in CFX-Pre, or change to a physical time step. There is more info on this in the documentation. Try looking in the "Solver modeling guide" or "CFX-Pre user guide"