हिन्दी में पढ़ेंHome › Formulas › Properties of matter & fluids › Reynolds number
Reynolds number
Re = ρvD/η
Where: D = screen distance (m), Re = Reynolds number, η = viscosity / efficiency, ρ = density (kg/m³) / resistivity, v = final velocity / speed (m/s)
Solved example
Given: D = 7, eta = 5, rho = 10, v = 4
Find: Re_ (Reynolds number)
- Formula: Re = D·ρ·v/η
- Substitute the values: Re = 10·4·7/5
- Result: Re = 56 dimensionless
Answer: Re_ = 56 dimensionless
Calculator
How to calculate Reynolds number
- Write down the formula: Re = ρvD/η.
- Note the known values (D, η, ρ, v).
- Substitute them and simplify to find Re_.
- Use the calculator above to solve for any letter.
Frequently asked questions
What is the formula for Reynolds number?
The formula is Re = ρvD/η, where D = screen distance (m), Re = Reynolds number, η = viscosity / efficiency, ρ = density (kg/m³) / resistivity, v = final velocity / speed (m/s).
What is Reynolds number when D = 7, eta = 5, rho = 10, v = 4?
Re_ = 56 dimensionless. Substitute the values into Re = ρvD/η and simplify.