How to reduce number of iterations in tabular data of transient thermal analysis

[Faraz1997]

Hello everyone,

I have been using transient thermal analysis to read temperatures.
The problem which I am facing is just for the result of 20 seconds of simulation, I am getting 223 iterations instead of 20.

The solution in the form of tabular data has divided 20 seconds into 223 iterations dividing each second into many milli-seconds.

Can anyone help me how to reduce number of iterations making each iteration for each second.

Thank you

 

[NRP99]

You can play with Analysis settings>step controls. By setting Auto time stepping to off (on/off/program controlled), you can adjust max /min time step to 1 sec.

Beware if no of iteration required are more than min time step, this may cause convergence issues. This is exactly the reason why Ansys required 223 iteration to solve 20s problem.

Another point to note, even if you have 223 time points you can request results at specific time intervals in Analysis settings>output controls>calculate results at.

 

[Faraz1997]

Thank you very much. your suggestion helped me in correcting my simulation.

There is another question if you can help.

I want to simulate and extract results of multiple nodes on a single plane with each node showing total time history based data or over time data in terms of temperature increase in transient thermal.

Can you help me in this.

Thank you

 

[NRP99]

Check probe results for this for limited no of nodes.

If you have lot of nodes then scripting in APDL might help. Check this forum/online for more information on extracting time history data. One such thread is -thread569-229270.