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Total Temperature in a Rotating Frame

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Old   September 10, 2005, 11:37
Default Total Temperature in a Rotating Frame
Paul Lewis
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Hi Everyone,

I've noticed in the rotating frame of my simulation the total temperature in some places is less than the temperature at the same point. I would expect the solver to calculate To = T + V^2 / 2Cp, and therefore To > T (total temp greater than static temp).

The problem doesn't occur in the stationary frame of my simulation, has anyone seen anything similar before? I'm using CFX 5.7


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Old   September 14, 2005, 14:47
Default Re: Total Temperature in a Rotating Frame
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"Total Temperature" is based on Rothalpy. Your formula is not correct. It should be To = T + 0.5*(V_rel^2-V_spin^2)/Cp. This can be less than static Temperature if V_spin is large. See the documentation on "Rotating Frame Quantities" in the Solver Theory Manual for more info.
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