Examples
Examples
Try the starting example
- Liquid density (kg/m³)
- 1000
- User-estimated pressure-wave speed (m/s)
- 1000
- Abrupt velocity change (m/s)
- 1.2
- Ideal pressure rise (Pa)
- 1200000
- Ideal pressure rise (bar)
- 12
Try another scenario
- Liquid density (kg/m³)
- 1001
- User-estimated pressure-wave speed (m/s)
- 1000
- Abrupt velocity change (m/s)
- 1.2
- Ideal pressure rise (Pa)
- 1201200
- Ideal pressure rise (bar)
- 12.012
Calculation method
Calculation method
Ideal pressure rise (Pa)
Joukowsky ideal instantaneous pressure rise Δp = ρ × wave speed × Δvelocity.
Ideal pressure rise (bar)
Joukowsky ideal instantaneous pressure rise Δp = ρ × wave speed × Δvelocity.
Symbols and units
- a
- Liquid density (kg/m³)
- b
- User-estimated pressure-wave speed (m/s)
- c
- Abrupt velocity change (m/s)
Use the units shown. A list keeps the order in which you enter its values. The symbol ^ means “raised to the power of”.
Assumptions & limits
Assumptions & limits
- Ideal rapid-closure estimate only; ignores transient network reflections, cavitation and pipe stress. Not surge protection sizing. Supported limits: Finite numeric values bounded to 1e9 magnitude; lists and tables contain 1–100 records unless a stricter bound is stated. Inputs use the units shown. Lists explicitly paired by a method must have matching lengths; independent polynomial coefficient vectors may differ. Respect stated physical, interpolation, policy and computational domain limits.
Are these inputs private?
These calculations run in your browser. A shared link contains the values you choose to share. Only questions submitted to the separate AI finder are sent to OpenAI.
Further reading
Background reading; this does not imply endorsement or independent review of SumFizz.