# Process residence time
# Scope: Mean hydraulic residence time at constant vessel volume and flow.
# Status: illustrative worked example; engineering review pending.
# Inputs are example values. Checks are editable example requirements, not standards.

volume = 100 L
flow = 5 L/min

duration := volume/flow [s]

check residence time target: duration >= 600 s

scenario alternative: volume = 80 L