मुफ्त उन्नत रेनॉल्ड्स संख्या कैलकुलेटर
रेनॉल्ड्स संख्या (Re) से प्रवाह प्रकार जानें। वेग, घनत्व और श्यानता से Re निकालें।
Reynolds Number
100,000.00
Reynolds Number vs Fluid Density
सूत्र
Reynolds Number
The Reynolds number predicts whether flow will be laminar (smooth) or turbulent (chaotic).
Formula
Re = rho v L / mu
For pipe flow: Re < 2300 is laminar, 2300-4000 is transitional, > 4000 is turbulent.
हल किया गया उदाहरण
Water (rho = 1000, mu = 0.001) at 2 m/s through a 5 cm pipe.
- 01Re = rho v L / mu
- 02Re = 1000 * 2 * 0.05 / 0.001
- 03Re = 100 / 0.001 = 100 000
- 04This is well into the turbulent regime.
अक्सर पूछे जाने वाले प्रश्न
What is the physical meaning of the Reynolds number?
It represents the ratio of inertial forces to viscous forces. High Re means inertia dominates (turbulent); low Re means viscosity dominates (laminar).
Why does the transition occur around Re = 2300?
This is an empirical observation for smooth pipe flow. Small disturbances are damped by viscosity at low Re but amplified at high Re.
Does the Reynolds number apply to gases?
Yes. Gases have lower density but also lower viscosity, so Re can still be high for fast flows.
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