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## Credits

Birla Institute of Technology & Science (BITS), Pilani
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## Reynolds Number for Non-Circular Tubes Solution

STEP 0: Pre-Calculation Summary
Formula Used
reynolds_number = Density*Fluid Velocity*Characteristic Length/Dynamic viscosity
Re = ρ*uf*Lc/η
This formula uses 4 Variables
Variables Used
Density - The density of a material shows the denseness of that material in a specific given area. This is taken as mass per unit volume of a given object. (Measured in Kilogram per Meter³)
Fluid Velocity - Fluid velocity is the volume of fluid flowing in the given vessel per unit cross sectional area. (Measured in Meter per Second)
Characteristic Length - A characteristic length is usually the volume of a system divided by its surface. For example, in calculating flow through circular and non-circular tubes, in order to examine flow conditions (i.e. the Reynolds number). In those cases, the characteristic length is the diameter of the pipe, or in case of non-circular tubes its hydraulic diameter. (Measured in Millimeter)
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: 997 Kilogram per Meter³ --> 997 Kilogram per Meter³ No Conversion Required
Fluid Velocity: 1 Meter per Second --> 1 Meter per Second No Conversion Required
Characteristic Length: 10 Millimeter --> 0.01 Meter (Check conversion here)
Dynamic viscosity: 10 Poise --> 1 Pascal Second (Check conversion here)
STEP 2: Evaluate Formula
Substituting Input Values in Formula
Re = ρ*uf*Lc/η --> 997*1*0.01/1
Evaluating ... ...
Re = 9.97
STEP 3: Convert Result to Output's Unit
9.97 --> No Conversion Required
9.97 <-- Reynolds Number
(Calculation completed in 00.031 seconds)

## < 11 Other formulas that you can solve using the same Inputs

Stanton Number (using basic fluid properties)
stanton_number = External convection heat transfer coefficient/(Specific Heat Capacity*Fluid Velocity*Density) Go
Reynolds Number
reynolds_number = Liquid Density*Fluid Velocity*Pipe Diameter/Dynamic viscosity Go
Reynolds Number for Circular Tubes
reynolds_number = Density*Fluid Velocity*Diameter /Dynamic viscosity Go
Stokes Force
Prandtl Number
prandtl_number = Specific Heat Capacity*Dynamic viscosity/Thermal Conductivity Go
Viscous Stress
viscous_stress = Dynamic viscosity*Velocity Gradient/Fluid Thickness Go
Pressure when density and height are given
pressure = Density*Acceleration Due To Gravity*Height Go
Molar Volume
molar_volume = (Atomic Weight*Molar Mass)/Density Go
Kinematic viscosity
kinematic_viscosity = Dynamic viscosity/mass density Go
Number of atomic sites
number_atomic_sites = Density/Atomic Mass Go
Relative Density
relative_density = Density/Water Density Go

## < 11 Other formulas that calculate the same Output

Reynolds number equation using boundary-layer momentum thickness
reynolds_number = (Static density*Static velocity*Boundary-layer momentum thickness for transition )/static viscosity Go
Reynold number for drag force on the plate in boundary layer flow
reynolds_number = (Drag Force/(0.73*Width*viscosity of fluid*Fluid Velocity))^2 Go
Reynolds Number
reynolds_number = Liquid Density*Fluid Velocity*Pipe Diameter/Dynamic viscosity Go
Reynold number at the end of the plate
reynolds_number = (Density*Fluid Velocity*Length)/viscosity of fluid Go
Reynolds Number for Circular Tubes
reynolds_number = Density*Fluid Velocity*Diameter /Dynamic viscosity Go
Reynolds number
reynolds_number = (Mass Flux*Equivalent diameter)/(viscosity of fluid) Go
Reynolds number for given Nusselt's number, Stanton number and Prandtl number
reynolds_number = Nusselt Number/(Stanton Number*Prandtl number) Go
Reynolds number given Stanton number and other dimensionless groups
reynolds_number = Nusselt Number/(Stanton Number*Prandtl number) Go
Reynolds number
reynolds_number = Inertia force/Viscous Force Go
Reynold number for drag coefficient in Blasius's solution of boundary layer flow
reynolds_number = (1.328/coefficient of drag)^2 Go
Reynolds Number When Frictional Factor of Laminar Flow is Given
reynolds_number = 64/Friction factor Go

### Reynolds Number for Non-Circular Tubes Formula

reynolds_number = Density*Fluid Velocity*Characteristic Length/Dynamic viscosity
Re = ρ*uf*Lc/η

## What is Reynolds number?

The Reynolds number is the ratio of inertial forces to viscous forces. The Reynolds number is a dimensionless number used to categorize the fluids systems in which the effect of viscosity is important in controlling the velocities or the flow pattern of a fluid.

## How to Calculate Reynolds Number for Non-Circular Tubes?

Reynolds Number for Non-Circular Tubes calculator uses reynolds_number = Density*Fluid Velocity*Characteristic Length/Dynamic viscosity to calculate the Reynolds Number, Reynolds Number for Non-Circular Tubes computes the Reynolds no. for fluid flow in non-circular tubes. It is a measure of how laminar or how turbulent the flow is. Reynolds Number and is denoted by Re symbol.

How to calculate Reynolds Number for Non-Circular Tubes using this online calculator? To use this online calculator for Reynolds Number for Non-Circular Tubes, enter Density (ρ), Fluid Velocity (uf), Characteristic Length (Lc) and Dynamic viscosity (η) and hit the calculate button. Here is how the Reynolds Number for Non-Circular Tubes calculation can be explained with given input values -> 9.97 = 997*1*0.01/1.

### FAQ

What is Reynolds Number for Non-Circular Tubes?
Reynolds Number for Non-Circular Tubes computes the Reynolds no. for fluid flow in non-circular tubes. It is a measure of how laminar or how turbulent the flow is and is represented as Re = ρ*uf*Lc/η or reynolds_number = Density*Fluid Velocity*Characteristic Length/Dynamic viscosity. The density of a material shows the denseness of that material in a specific given area. This is taken as mass per unit volume of a given object. , Fluid velocity is the volume of fluid flowing in the given vessel per unit cross sectional area, A characteristic length is usually the volume of a system divided by its surface. For example, in calculating flow through circular and non-circular tubes, in order to examine flow conditions (i.e. the Reynolds number). In those cases, the characteristic length is the diameter of the pipe, or in case of non-circular tubes its hydraulic diameter and 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 Non-Circular Tubes?
Reynolds Number for Non-Circular Tubes computes the Reynolds no. for fluid flow in non-circular tubes. It is a measure of how laminar or how turbulent the flow is is calculated using reynolds_number = Density*Fluid Velocity*Characteristic Length/Dynamic viscosity. To calculate Reynolds Number for Non-Circular Tubes, you need Density (ρ), Fluid Velocity (uf), Characteristic Length (Lc) and Dynamic viscosity (η). With our tool, you need to enter the respective value for Density, Fluid Velocity, Characteristic Length and 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, Fluid Velocity, Characteristic Length and Dynamic viscosity. We can use 11 other way(s) to calculate the same, which is/are as follows -
• reynolds_number = Density*Fluid Velocity*Diameter /Dynamic viscosity
• reynolds_number = Liquid Density*Fluid Velocity*Pipe Diameter/Dynamic viscosity
• reynolds_number = 64/Friction factor
• reynolds_number = Nusselt Number/(Stanton Number*Prandtl number)
• reynolds_number = (Density*Fluid Velocity*Length)/viscosity of fluid
• reynolds_number = (Drag Force/(0.73*Width*viscosity of fluid*Fluid Velocity))^2
• reynolds_number = (1.328/coefficient of drag)^2
• reynolds_number = (Mass Flux*Equivalent diameter)/(viscosity of fluid)
• reynolds_number = (Static density*Static velocity*Boundary-layer momentum thickness for transition )/static viscosity
• reynolds_number = Inertia force/Viscous Force
• reynolds_number = Nusselt Number/(Stanton Number*Prandtl number)
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