Flooding Time - Simple Orifice Estimate

Flooding time through a simple orifice - √(2gh) exit velocity + compartment volume.

FloodingOrificeHole

Hole aream²Head above holemCompartment volumem³Discharge coefficient

Initial flow rate: 4.60m³/s

Time to fill (simple): 1.8min

Changing the inputs requires JavaScript. The calculator above shows its default inputs and result. The formula, symbols, and regulatory sources are shown in the Formula section below.

Formula, assumptions, and limits

\dot V = C_d A \sqrt{2gh}

Symbol	Meaning	Unit
$A$	Hole area	m²
$h$	Water head above hole	m
$C_d$	Discharge coefficient

Source: Bernoulli's principle + Torricelli

In short

Flooding time through a simple orifice - \u221a(2gh) exit velocity + compartment volume.

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