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## A vortex flowmeter works on the principle that the Strouhal number of 0.2 is a constant over a wide range of flow rates GATE-Aerospace Engineering-Question-2012

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AnswersIn dimensional analysis, the Strouhal number (St) is a dimensionless number describing oscillating flow mechanisms. The parameter is named after Vincenc Strouhal, a Czech physicist who experimented in 1878 with wires experiencing vortex shedding and singing in the wind.

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