Local Loss Coefficient of Laminar Flow through Sudden Enlargement in Circular Pipes

2007 
Generally local loss coefficient is found to be just the function of enlargement ratio at sudden enlargement in circular pipes in turbulent flow. However, in many other instances, the Reynolds number is low, and the flow is laminar. Then local loss coefficient varies significantly not only with enlargement ratio but also with Reynolds number. Therefore, the existing results lack accuracy in the laminar regime.
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