Orifice Flow Calculator — Flow Through an Orifice

Compute flow through an orifice from pressure drop and discharge coefficient. Size orifices for flow measurement and control.

Fluid Velocity (m/s)
Pipe Diameter (m)
Kinematic Viscosity ν (m²/s)
Common ν: Water 20°C = 1.004×10⁻⁶ · Air 20°C = 1.516×10⁻⁵ m²/s
⟨∿⟩ Fluids Reference: All calculations use SI units (Pa, m³/s, W, K). Moody friction factor uses Blasius smooth-pipe approximation. Bernoulli assumes ideal, incompressible, steady flow along a streamline.
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How It Works

Compute flow through an orifice from pressure drop and discharge coefficient. Size orifices for flow measurement and control

Each component has a specific meaning:

  • Pressure drop — The pressure drop recorded for the patient or scenario being assessed.
  • Discharge coefficient — The discharge coefficient recorded for the patient or scenario being assessed.

Note: Interpret the orifice flow result against the clinical thresholds and context described above.

How to Use

Enter the pressure drop, discharge coefficient for the patient or scenario you are assessing. Compute flow through an orifice from pressure drop and discharge coefficient. Size orifices for flow measurement and control. Use the orifice flow result to inform your clinical assessment.

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Frequently Asked Questions