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internal flow acheiving high velocity

Question asked by Asrar Ur Raheman Mohammed on Jan 2, 2018

acheiving around 550m/s velocity in internal flow pipe as the dia of inlet varies from 0.5mm to 1mm with the difference of 0.1mm total pressure at the inlet

is 0.6Mpa with this flow velocity definetly there will be shockwaves at  the expansion i will attach the picture after simulation can any one help me to plot the shock waves and how could i justify the flow. the main aim of this is to get maximum swirl flow along the wall.