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Indian Institute of Technology Kharagpur (IIT KGP), Kharagpur
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Sardar Patel College of Engineering (SPCE), Mumbai
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## Reynolds Number for airfoil Solution

STEP 0: Pre-Calculation Summary
Formula Used
reynolds_number = (Density of fluid*Flow Velocity*Chord Length of Airfoil)/Dynamic viscosity
Re = (ρFluid*V*c)/η
This formula uses 4 Variables
Variables Used
Density of fluid - Density of Fluid is defined as the mass of fluid per unit volume of the said fluid. (Measured in Kilogram per Meter³)
Flow Velocity - Flow Velocity is the velocity of the flow of any fluid. (Measured in Meter per Second)
Chord Length of Airfoil - The Chord Length of Airfoil is the distance from the leading edge to the trailing edge. (Measured in Meter)
Dynamic viscosity - Dynamic viscosity is the measurement of the fluid's internal resistance to flow while kinematic viscosity refers to the ratio of dynamic viscosity to density. (Measured in Poise)
STEP 1: Convert Input(s) to Base Unit
Density of fluid: 10 Kilogram per Meter³ --> 10 Kilogram per Meter³ No Conversion Required
Flow Velocity: 1 Meter per Second --> 1 Meter per Second No Conversion Required
Chord Length of Airfoil: 1 Meter --> 1 Meter No Conversion Required
Dynamic viscosity: 10 Poise --> 1 Pascal Second (Check conversion here)
STEP 2: Evaluate Formula
Substituting Input Values in Formula
Re = (ρFluid*V*c)/η --> (10*1*1)/1
Evaluating ... ...
Re = 10
STEP 3: Convert Result to Output's Unit
10 --> No Conversion Required
10 <-- Reynolds Number
(Calculation completed in 00.016 seconds)

## < 7 CFD Calculators

Lift on airfoil
Lift_on_airfoil = Normal Force on airfoil*cos(Angle of Attack of airfoil)-Axial Force on airfoil*sin(Angle of Attack of airfoil) Go
Drag on airfoil
Drag_on_airfoil = Normal Force on airfoil*sin(Angle of Attack of airfoil)+Axial Force on airfoil*cos(Angle of Attack of airfoil) Go
Reynolds Number for airfoil
reynolds_number = (Density of fluid*Flow Velocity*Chord Length of Airfoil)/Dynamic viscosity Go
Y plus
Y_plus = First layer height*Density of air*Friction Velocity for airfoil/Kinematic viscosity Go
Wall Shear Stress for airfoil
wall_shear_stress = 0.5*Skin friction coefficient*Flow Velocity*Density of air Go
Friction Velocity for airfoil
Friction_Velocity_for_airfoil = (Wall Shear Stress for airfoil/Density of air)^0.5 Go
Skin friction coefficient
skin_friction_coefficient = (2*log10(Reynolds Number)-0.65)^(-2.30) Go

### Reynolds Number for airfoil Formula

reynolds_number = (Density of fluid*Flow Velocity*Chord Length of Airfoil)/Dynamic viscosity
Re = (ρFluid*V*c)/η

## How to Calculate Reynolds Number for airfoil?

Reynolds Number for airfoil calculator uses reynolds_number = (Density of fluid*Flow Velocity*Chord Length of Airfoil)/Dynamic viscosity to calculate the Reynolds Number, The Reynolds Number for airfoil is a dimensionless value that is used to determine whether the fluid is exhibiting laminar flow (R less than 2300) or turbulent flow (R greater than 4000). Reynolds Number is denoted by Re symbol.

How to calculate Reynolds Number for airfoil using this online calculator? To use this online calculator for Reynolds Number for airfoil, enter Density of fluid Fluid), Flow Velocity (V), Chord Length of Airfoil (c) & Dynamic viscosity (η) and hit the calculate button. Here is how the Reynolds Number for airfoil calculation can be explained with given input values -> 10 = (10*1*1)/1.

### FAQ

What is Reynolds Number for airfoil?
The Reynolds Number for airfoil is a dimensionless value that is used to determine whether the fluid is exhibiting laminar flow (R less than 2300) or turbulent flow (R greater than 4000) and is represented as Re = (ρFluid*V*c)/η or reynolds_number = (Density of fluid*Flow Velocity*Chord Length of Airfoil)/Dynamic viscosity. Density of Fluid is defined as the mass of fluid per unit volume of the said fluid, Flow Velocity is the velocity of the flow of any fluid, The Chord Length of Airfoil is the distance from the leading edge to the trailing edge & Dynamic viscosity is the measurement of the fluid's internal resistance to flow while kinematic viscosity refers to the ratio of dynamic viscosity to density.
How to calculate Reynolds Number for airfoil?
The Reynolds Number for airfoil is a dimensionless value that is used to determine whether the fluid is exhibiting laminar flow (R less than 2300) or turbulent flow (R greater than 4000) is calculated using reynolds_number = (Density of fluid*Flow Velocity*Chord Length of Airfoil)/Dynamic viscosity. To calculate Reynolds Number for airfoil, you need Density of fluid Fluid), Flow Velocity (V), Chord Length of Airfoil (c) & Dynamic viscosity (η). With our tool, you need to enter the respective value for Density of fluid, Flow Velocity, Chord Length of Airfoil & Dynamic viscosity and hit the calculate button. You can also select the units (if any) for Input(s) and the Output as well.
How many ways are there to calculate Reynolds Number?
In this formula, Reynolds Number uses Density of fluid, Flow Velocity, Chord Length of Airfoil & Dynamic viscosity. We can use 7 other way(s) to calculate the same, which is/are as follows -
• reynolds_number = (Density of fluid*Flow Velocity*Chord Length of Airfoil)/Dynamic viscosity
• skin_friction_coefficient = (2*log10(Reynolds Number)-0.65)^(-2.30)
• wall_shear_stress = 0.5*Skin friction coefficient*Flow Velocity*Density of air
• Friction_Velocity_for_airfoil = (Wall Shear Stress for airfoil/Density of air)^0.5
• Y_plus = First layer height*Density of air*Friction Velocity for airfoil/Kinematic viscosity
• Lift_on_airfoil = Normal Force on airfoil*cos(Angle of Attack of airfoil)-Axial Force on airfoil*sin(Angle of Attack of airfoil)
• Drag_on_airfoil = Normal Force on airfoil*sin(Angle of Attack of airfoil)+Axial Force on airfoil*cos(Angle of Attack of airfoil) Let Others Know