Transient Parameter Study - To less timesteps

Jens Trommer · December 9, 2019, 09:51

At the moment i performing a transient Parameter study on CFX in Ansys Workbench.

Iam testing the thermal heat distribution for different cases (different sizes and input parameters) over 2 hours.

When i click on update all points, the solver is calculating the first design point with all time steps (so 0-7200 s) .

All the other design points are calculated with just two timesteps (7200-7220)

Any tipss what iam doing wrong?

Gert-Jan · December 9, 2019, 10:34

In Pre you have multiple options for Time duration. There choose the option "Time per Run" and set 7200 s. Then it will add 7200 s each time you will continue the calculation.

If you want to start at t=0 each time, then you should change the Initial time. Change the option from "Automatic with Value" to 'Value" and set it equal to 0[s].

Jens Trommer · December 9, 2019, 10:40

All this settings i have set, but if i start the parameter study
he still continue at the last time step from the previous design point (and so he cancel the simulation after 1 time step)

December 9, 2019, 09:51	Transient Parameter Study - To less timesteps	#1
Jens Trommer New Member M S Join Date: Nov 2019 Posts: 8 Rep Power: 6	At the moment i performing a transient Parameter study on CFX in Ansys Workbench. Iam testing the thermal heat distribution for different cases (different sizes and input parameters) over 2 hours. When i click on update all points, the solver is calculating the first design point with all time steps (so 0-7200 s) . All the other design points are calculated with just two timesteps (7200-7220) Any tipss what iam doing wrong?

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December 9, 2019, 10:34		#2
Gert-Jan Senior Member Gert-Jan Join Date: Oct 2012 Location: Europe Posts: 1,827 Rep Power: 27	In Pre you have multiple options for Time duration. There choose the option "Time per Run" and set 7200 s. Then it will add 7200 s each time you will continue the calculation. If you want to start at t=0 each time, then you should change the Initial time. Change the option from "Automatic with Value" to 'Value" and set it equal to 0[s].

December 9, 2019, 10:40		#3
Jens Trommer New Member M S Join Date: Nov 2019 Posts: 8 Rep Power: 6	All this settings i have set, but if i start the parameter study he still continue at the last time step from the previous design point (and so he cancel the simulation after 1 time step)