मुफ्त फ्रूड संख्या कैलकुलेटर
फ्रूड संख्या (Fr) से प्रवाह प्रकार जानें। वेग और गहराई से Fr निकालें।
Froude Number
0.957990
Froude Number vs Flow Velocity
सूत्र
Froude Number
The Froude number characterises the ratio of flow inertia to gravitational effects in open-channel flow.
Formula
Fr = v / sqrt(g d)
Fr < 1: subcritical (tranquil). Fr = 1: critical. Fr > 1: supercritical (rapid).
हल किया गया उदाहरण
River at 3 m/s with 1 m depth.
- 01Fr = v / sqrt(g d)
- 02Fr = 3 / sqrt(9.807 * 1)
- 03Fr = 3 / 3.131
- 04Fr = 0.958 (subcritical, but nearly critical)
अक्सर पूछे जाने वाले प्रश्न
What is the physical meaning of the Froude number?
It compares the speed of the flow to the speed of surface gravity waves. When Fr > 1, flow moves faster than waves can propagate upstream, so upstream conditions cannot influence downstream.
How does the Froude number relate to ship design?
For ships, the Froude number (based on hull length) determines wave-making resistance. Ships are most efficient below the hull speed, roughly Fr = 0.4.
What happens at Fr = 1?
Critical flow, with minimum specific energy for a given discharge. This condition is used in weir design to measure flow rates.
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