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velocity and temperature profile

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Old   August 31, 2009, 00:58
Default velocity and temperature profile
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victor mahan
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i am modeling "simulation of so2 dispersion from stack". i use spalart allmaras, energy, and species transport without reaction. i also define velocity and temperature profile in velocity inlet.
After i iterate the case, the result was good (velocity and temperature profile didn't change). But after that i add gravitational acceleration in operating conditions and running it, the result is strange. velocity and temperature profile that i've made was changing.why could this happened???

thanks for helping
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