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Reynolds Number and Flow Regimes
Formula
The Reynolds number (Re) is a dimensionless quantity that predicts flow behavior. Re = ρvD/μ, where ρ is density, v is velocity, D is diameter, and μ is dynamic viscosity. Below 2300 flow is laminar; above 4000 it is turbulent; between is transitional.
Common use cases:
- Pipe flow classification
- Aerodynamic analysis
- Chemical reactor design
Frequently Asked Questions
Maria Gonzalez
Registered Dietitian, RD, MPH
Maria is a Registered Dietitian with a Master's in Public Health. She focuses on evidence-based nutrition assessment tools including BMI, calorie calculations, and body composition analysis.
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