Where, ∆f = Doppler frequency shift v = Velocity of fluid (actually, of the particle reflecting the sound wave) f = Frequency of incident sound wave θ = Angle between transducer and pipe centerlines c = Speed of sound in the process fluid
Where,∆f = Doppler frequency shiftv = Velocity of fluid (actually, of the particle reflecting the sound wave)f = Frequency of incident sound waveθ = Angle between transducer and pipe centerlinesc = Speed of sound in the process fluid