Conversion of pressure units
Conversion of volume units
Conversion of volume flow units
Pressure drop in a tube
The volume flow Q of a liquid with dynamic viscosity η in a tube with length L and inner diameter D causes a pressure drop Δp
The pressure drop in laminar case is calculated as follows:
Calculation
m/s
Conversion
mm²/s
g/ml
mPas
Viscosity
Dynamic viscosity η: 1 mPas = 1 cP (P = Poise)
Kinematic viscosity ν: 1 mm²/s = 1 cSt (St = Stokes)
Examples of viscosities
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