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| CALC : Flow : Bernoulli 011 : Hydraulic or Piezometric Pressure - Static and Potential Pressure : Calculator
Description : Calculate the hydraulic or piezometric Bernoulli pressure Ph; the sum of the potential pressure Pp and static pressure Ps.
Discussion : The hydraulic or piezometric pressure is used for stationary fluids, and for measurinig between points woth the same diameter ie. fluid velocity is constant.
Figures :
Input Variables :
- ρ = Fluid Density
- Ps = Section Fluid Gauge Pressure
- Z = Section Elevation Above Datum
- g = Standard Gravity Acceleration At Sea Level
Output Variables :
- Ph = Fluid Total Pressure
- Pp = Fluid Potential Pressure
Calculation :
Pp = ρ g Z
Ph = Ps + Pp
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| CALC : Flow : Bernoulli 012 : Hydraulic Pressure Difference - Friction Loss Constant Diameter : Calculator
Description : Calculate the Bernoulli friction pressure loss between section 1 and section 2 with constant diameter.
Discussion : The friction pressure loss ΔPf is equal to the difference in the Bernoulli hydraulic or piezometric pressure.
Note : The diameter can vary in the section between the two pressure measurement points provided that the diameters are the same at the two pressure measurement points.
Figures :
Input Variables :
- ρ = Fluid Density
- P1 = Section 1 Fluid Gauge Pressure
- P2 = Section 2 Fluid Gauge Pressure
- Z1 = Point 1 Elevation Above Datum
- Z2 = Point 2 Elevation Above Datum
- g = Standard Gravity Acceleration At Sea Level
Output Variables :
- ΔP = Fluid Static Pressure Difference
- ΔPf = Fluid Friction Pressure Loss
Calculation :
ΔPf = P1 - P2 + ρ g ( Z1 - Z2 )
ΔP = P1 - P2
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| CALC : Flow : Bernoulli 013 : Hydraulic Static Pressure Difference From Friction Pressure Loss : Calculator
Description : Calculate the static pressure difference ΔP from the friction pressure loss ΔPf between sections with constant diameter and varying elevation.
Discussion : The friction pressure loss ΔPf is equal to the difference in the Bernoulli hydraulic or piezometric pressure. The diameter can vary in the section between the two pressure measurement points provided that the diameters are the same at the two pressure measurement points.
Figures :
Input Variables :
- ΔPf = Fluid Friction Pressure Loss
- ρ = Fluid Density
- Z1 = Point 1 Elevation Above Datum
- Z2 = Point 2 Elevation Above Datum
- g = Standard Gravity Acceleration At Sea Level
Output Variables :
- ΔP = Fluid Static Pressure Difference
Calculation :
ΔP = ΔPf - ρ g ( Z1 - Z2 )
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| CALC : Flow : Bernoulli 014 : Hydraulic Friction Pressure Loss From Static Pressure Difference : Calculator
Description : Calculate the friction pressure loss ΔPf from the static pressure difference ΔP between sections with constant diameter and varying elevation.
Discussion : The friction pressure loss ΔPf is equal to the difference in the Bernoulli hydraulic or piezometric pressure. The diameter can vary in the section between the two pressure measurement points provided that the diameters are the same at the two pressure measurement points.
Figures :
Input Variables :
- ΔP = Fluid Static Pressure Difference
- ρ = Fluid Density
- Z1 = Point 1 Elevation Above Datum
- Z2 = Point 2 Elevation Above Datum
- g = Standard Gravity Acceleration At Sea Level
Output Variables :
- ΔPf = Fluid Friction Pressure Loss
Calculation :
ΔPf = ΔP + ρ g ( Z1 - Z2 )
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| CALC : Flow : Bernoulli 061 : Stationary Static Pressure From Relative Elevation : Calculator
Description : Calculate the relative static pressure from elevation in a stationary fluid column.
Discussion : This tool can also be used for moving fluids (eg flow in an open channel or a pipeline) provided that friction losses are negligible and the fluid velocity is constant through the column.
Figures :
Input Variables :
- ρ = Fluid Density
- P1 = Section 1 Fluid Gauge Pressure
- Z1 = Point 1 Elevation Above Datum
- Z2 = Point 2 Elevation Above Datum
- g = Standard Gravity Acceleration At Sea Level
Output Variables :
- P2 = Section 2 Fluid Gauge Pressure
Calculation :
P2 = P1 + ρ g ( Z1 - Z2 )
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| CALC : Flow : Bernoulli 062 : Stationary Static Pressure Relative To Free Surface Elavation : Calculator
Description : Calculate the static pressure from the elevation relative to the surface of a stationary fluid.
Discussion : The gauge pressure is assumed to be zero at the fluid surface.
This tool can also be used for moving fluids (eg flow in an open channel or pipeline) provided that friction losses are negligible and the fluid velocity is constant through the column.
Figures :
Input Variables :
- ρ = Fluid Density
- Z = Section Elevation Above Datum
- Zs = Fluid Surface Elevation Above Datum
- g = Standard Gravity Acceleration At Sea Level
Output Variables :
- P = Section Fluid Gauge Pressure
Calculation :
P = ρ g ( Zs - Z )
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| CALC : Flow : Bernoulli 063 : Stationary Static Pressure From Fluid Height or Depth : Calculator
Description : Calculate the static pressure from the height of fluid above a point in a stationary fluid.
Discussion : The gauge pressure is assumed to be zero at the fluid surface.
This tool can also be used for moving fluids (eg flow in an open channel or pipeline) provided that friction losses are negligible and the fluid velocity is constant through the column.
Figures :
Input Variables :
- ρ = Fluid Density
- H = Section Fluid Depth Below Surface
- g = Standard Gravity Acceleration At Sea Level
Output Variables :
- P = Section Fluid Gauge Pressure
Calculation :
P = ρ g H
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| CALC : Flow : Bernoulli 071 : Submerged Pipe Wall Delta Pressure From Relative Elevation : Calculator
Description : Calculate the delta static pressure across the pipe wall of a submerged pipeline from the relative elevation.
Discussion : The internal and external pressure both vary with elevation. The external fluid gauge pressure is assumed to be zero at the fluid surface. If the internal fluid is lighter than the external fluid the maximum delta pressure will occur at the highest submerged point on the pipeline. Conversely, if the internal fluid is heavier than the external fluid the maximum delta pressure will occur at the lowest point on the pipeline.
Figures :
Input Variables :
- ρe = External Fluid Density
- ρi = Fluid Density
- P1 = Section 1 Fluid Gauge Pressure
- Z1 = Point 1 Elevation Above Datum
- Z2 = Point 2 Elevation Above Datum
- Zs = Fluid Surface Elevation Above Datum
- g = Standard Gravity Acceleration At Sea Level
Output Variables :
- ΔP = Pipe Wall Delta Pressure
- P2 = Section 2 Fluid Gauge Pressure
- Pe = External Fluid Gauge Pressure
Calculation :
P2 = P1 + ρi g ( Z1 - Z2 )
Pe = ρe g ( Zs - Z2 )
ΔP = P2 - Pe
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| CALC : Flow : Bernoulli 072 : Submerged Pipe Wall Delta Pressure From Fluid Height : Calculator
Description : Calculate the delta static pressure across the pipe wall of a submerged pipeline from the external fluid height or depth.
Discussion : The internal pressure is known. The external pressure varies with elevation. The external fluid gauge pressure is assumed to be zero at the fluid surface.
Figures :
Input Variables :
- ρe = External Fluid Density
- H = Section Fluid Depth Below Surface
- P2 = Section 2 Fluid Gauge Pressure
- g = Standard Gravity Acceleration At Sea Level
Output Variables :
- ΔP = Pipe Wall Delta Pressure
- Pe = External Fluid Gauge Pressure
Calculation :
Pe = ρe g H
ΔP = P2 - Pe
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