The Clepsydra: A Measurement Threshold, Not a Mystery

Key Points

• This research explores why the clepsydra maintains a constant flow rate despite decreasing sand height, challenging classical models.
• Analysis of flow behaviors in clepsydra under varying conditions
• Comparison to classical granular flow models
• Examination of pressure assumptions at the orifice
• Clepsydra maintains a nearly constant flow rate contrary to predictions of classical models.
• The height of sand (h) loses its significance at the orifice, contradicting typical pressure assumptions.
• No additional forces or friction alterations are needed to explain the flow behavior.