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Nozzle force

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Old   August 25, 2015, 10:15
Default Nozzle force
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MOHAMAD
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Dear all
I have a simple question but i am a little confused!
I solved a simple internal flow of a converging nozzle and now i want to compute the force on the body. I calculate it in two ways
1- i used a control volume outside of nozzle (using pressure and momentum at inlet & outlet)
2- i used a CV inside the nozzle (Integrating pressure on walls)
But i got different answers i dont know why???
PLEASE help me !!!
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control volume, nozzle flow


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