General Mechanical

General Mechanical

How to set up time in transient thermal analysis?

    • amando.gallardo
      Subscriber

      Hello!

      I want to simulate a thermal cycling with time depending. Temperature goes: 20°C (12 hrs), 40°C (14 hrs), 80°C (6hrs), -40°C(6 hrs), 40°C(14 hrs) and 20°C(4 hrs).

      I know it might be defined through step controls, however I am not pretty sure about the right set up for time.

      Could you help me to clarify that please?

      Thank you!

    • peteroznewman
      Subscriber
      What is the Initial temperature of the parts? If it is 20C, then step 1 is irrelevant.nANSYS computes in seconds. The 40C is 14 hours = 50,400 seconds.nUnder Analysis Settings, change Auto Time Stepping to On.nInitial Time Step = 500 seconds or about 1%nMinimum Time Step = 50 seconds or about 0.1%nMaximum Time Step = 5000 seconds or about 10%nUse a similar pattern for the other steps.n
    • amando.gallardo
      Subscriber
      Hello Peter!nYes, the initial temp of the parts if 20?C.nUnderstood, that was my doubt, it is clear now nThank you so much, I really appreciate your help!n
    • amando.gallardo
      Subscriber
      HI Peter, I tried to set up the time step controls as you suggest, however I get an error: Invalid maximum time stepnHow can I to overcome this issue?n:Dn
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