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Old   March 31, 2007, 16:26
Default Total and static temperature
  #1
jak
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I have modeled a heated isothermal cylinder in natural convection and for some reason the total tmeperature is lower than the static temperature how is this possible?
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Old   April 1, 2007, 01:08
Default Re: Total and static temperature
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Mahesh
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What kind of solver are u using. You must check the values of density or specific heat. Sonce its a convection problem, i think you are having a variable density, i guess the density values are going negetive during iterations. If this is the problem, you can enforce a bound on density values to be more than zero. Hope this helped Mahesh.R
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Old   April 1, 2007, 11:05
Default Re: Total and static temperature
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greg
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I know that statis temperature is what you measure. I forgot what is total temperature but I know that it is static temperature powered by something (velocity or.....)
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Old   April 1, 2007, 11:08
Default Re: Total and static temperature
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Mahesh
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Static Temperature is the temperature that you measure. Total temperature is the temperature of the flow if it were brought to rest adiabatically.
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Old   April 2, 2007, 12:27
Default Re: Total and static temperature
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Andy R
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Total temp is the static temperature the fluid would reach if it were brought to rest isentropically
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Old   April 2, 2007, 12:59
Default Re: Total and static temperature
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Mahesh
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Thanks Andy for correcting that, i forgot it was isentropically and not adiabatically
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Old   April 18, 2007, 00:55
Default High Temperature variation
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priya
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My maximum temp at the inlet of a valve is 545C and the flow is adiabatic flow.I need a temperature downfall but during analysis it takes 545c as the min temp and i hav a high temp variation.I am getting resonable pressure values but high temp variation.

Its a sonic flow inlet Static pr: 181.428 bar Static temp:545c outlet: normal speed: 654m/s
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