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 jak March 31, 2007 16:26

Total and static temperature

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?

 Mahesh April 1, 2007 01:08

Re: Total and static temperature

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

 greg April 1, 2007 11:05

Re: Total and static temperature

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.....)

 Mahesh April 1, 2007 11:08

Re: Total and static temperature

Static Temperature is the temperature that you measure. Total temperature is the temperature of the flow if it were brought to rest adiabatically.

 Andy R April 2, 2007 12:27

Re: Total and static temperature

Total temp is the static temperature the fluid would reach if it were brought to rest isentropically

 Mahesh April 2, 2007 12:59

Re: Total and static temperature

Thanks Andy for correcting that, i forgot it was isentropically and not adiabatically

 priya April 18, 2007 00:55

High Temperature variation

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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