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Need help with Comsol (Heat Transfer Module)

  1. Nov 12, 2008 #1

    I have this problem. I have a cylinder filled with a hot Nitrogen gas
    (340 K) under 3000 psi pressure. The cylinder is exposed to the air
    and I need to find a temperature distribution in this system as a function of
    time. I am using Heat Transfer model -> Non-Isothermal Flow. The
    solution does not converge. Well, it kind of does but it's somehow the pressure dependent. If the gas is at pressure = 1 Atm or slightly higher everything is fine but when I set P_nitrogen > 100psi (and in fact I need 3000 psi!) comsol stops working. How come it cares what pressure I have?

    Any ideas?

    Thank you!
  2. jcsd
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