Transient simulation for ideal gas

Ba Ba
Ba Ba New Altair Community Member
edited September 2023 in Community Q&A

I am trying to simulate ideal gas compression in a cylinder. Have added initial pressure and temperature values as given in tutorials.

However I am getting error after 3 timesteps of Negative absolute temperature for gas 

I also tried going for constant density run first and then restarting as ideal gas. But still the error persists 

 

Any idea what's wrong.

 

I modelled in Hypermesh and then expoerted the model

 

Thansk in advance 

Answers

  • acupro
    acupro
    Altair Employee
    edited September 2023

    Please post the .inp and .Log files for review.