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What causes the flow properties to vary in quasi – one – dimensional flow?

What causes the flow properties to vary in quasi – one – dimensional flow? Correct Answer Cross – sectional area

In case of quasi – one dimensional flow the flow properties keep changing along the distance x due to the varying cross – sectional area (A) which is in contrast to the one – dimensional flow. In that, the area remains constant thus, the flow properties change fir to the presence of shock wave friction and heat addition or removal.

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