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help!!! negative internal energy

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Old   September 26, 2007, 11:17
Default help!!! negative internal energy
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lu.y
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I'm writing a program to compute blunt body flow,using ideal gas, the mach number is 10,when altitude is 0km,it works well,but when it is 30km, negative internal energy occurs. could anyone tell me how to solve this? thanks!
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