Bernoulli's Equation Pitot Tube

Calculate fluid velocity from the Pitot tube pressure measurement using the Bernoulli equation.

Pitot tubes are used to measure the fluid stagnation pressure (the sum of the static pressure and the dynamic pressure). The fluid velocity can be calculated from the Pitot tube pressure for cases where the static pressure is negligible. For example in shallow water where the stagnation pressure is measured by gauge pressure.

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CALCULATOR : Bernoulli Equation Liquid Pitot Tube Velocity From Pressure [FREE] ±

Calculate the Bernoulli equation liquid velocity from the pressure difference in a Pitot tube.

Pitot tubes measure the pitot pressure (the stagnation pressure or sum of static and dynamic pressure). The fluid velocity may be calculated from the pitot pressure provided that variations in static pressure are small.

Tool Input

Pp : Pitot Tube Pressure
ρ : Fluid Density

Tool Output

V : Fluid Velocity

CALCULATOR : Bernoulli Equation Fresh Water Density From Temperature [FREE] ±

Calculate Bernoulli equation fresh water density from temperature at atmospheric pressure (IAPWS R7-97 steam table).

The calculation is valid from the freezing point (0 C) to the boiling point (100 C). Use the Result Plot option to plot density versus temperature.

Reference : IAPWS R7-97 Industrial Formulation for thermodynamic Properties of Water and Steam

Tool Input

T : Temperature

Tool Output

ρ : Density

CALCULATOR : Bernoulli Equation Salt Water Density From Temperature And Salinity [FREE] ±

Calculate Bernoulli equation salt water density from temperature and practical salinity at atmospheric pressure (TEOS-10 seawater).

Practical salinity = parts per thousand of dissolved solids (mainly salt). The absolute salinity is taken as 35.16504 / 35 times the practical salinity. The absolute salinity anomaly δSA is ignored. Use the Result Plot option to plot density versus temperature.

Reference : TEOS-10 Thermodynamic Equation Of Seawater (2010)

Tool Input

T : Seawater Temperature

Tool Output

ρ : Seawater Density

CALCULATOR : Bernoulli Equation Liquid Density And Specific Gravity [FREE] ±

Calculate Bernoulli equation liquid density and specific gravity, degrees Baume, degrees Twaddell, and degrees API.

For liquids lighter than or equal to water the density can be defined as degrees API, or degrees Baume (Be-). For liquids heavier than water the density can be defined by degrees Baume (Be+), or degrees Twaddell.

Tool Input

sgtype : Density Type
- SGu : User Defined Specific Gravity
- Be+u : User Defined Degrees Baume SG > 1
- Be-u : User Defined Degrees Baume SG <= 1
- Twu : User Defined Degrees Twaddell SG > 1
- APIu : User Defined Degrees API SG <= 1
- ρu : User Defined Liquid Density

Tool Output

ρ : Fluid Density
API : Degrees API SG ≤ 1
Be+ : Degrees Baume SG > 1
Be- : Degrees Baume SG ≤ 1
SG : Specific Gravity
Tw : Degrees Twaddell SG > 1