Diameter at which turbulence starts Calculator

✖The kinematic Viscosity is an atmospheric variable defined as the ratio between the dynamic viscosity μ and the density ρ of the fluid.ⓘ Kinematic Viscosity [ν]			+10% -10%
✖Rotational speed the number of turns of the object divided by time, specified as revolutions per minute.ⓘ Rotational speed [w]			+10% -10%

✖Diameter is a straight line passing from side to side through the center of a body or figure, especially a circle or sphere.ⓘ Diameter at which turbulence starts [D]

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Formula

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Diameter at which turbulence starts

Formula

`"D" = (((5*10^5)*"ν")/("w"))^1/2`

Example

`"36.25m"=(((5*10^5)*"7.25St")/("5rad/s"))^1/2`

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Diameter at which turbulence starts Solution

STEP 0: Pre-Calculation Summary

Formula Used

Diameter = (((5*10^5)*Kinematic Viscosity)/(Rotational speed))^1/2
D = (((5*10^5)*ν)/(w))^1/2
This formula uses 3 Variables

Variables Used

Diameter - (Measured in Meter) - Diameter is a straight line passing from side to side through the center of a body or figure, especially a circle or sphere.
Kinematic Viscosity - (Measured in Square Meter per Second) - The kinematic Viscosity is an atmospheric variable defined as the ratio between the dynamic viscosity μ and the density ρ of the fluid.
Rotational speed - (Measured in Radian per Second) - Rotational speed the number of turns of the object divided by time, specified as revolutions per minute.

STEP 1: Convert Input(s) to Base Unit

Kinematic Viscosity: 7.25 Stokes --> 0.000725 Square Meter per Second (Check conversion here)
Rotational speed: 5 Radian per Second --> 5 Radian per Second No Conversion Required

STEP 2: Evaluate Formula

Substituting Input Values in Formula

D = (((5*10^5)*ν)/(w))^1/2 --> (((5*10^5)*0.000725)/(5))^1/2

Evaluating ... ...

D = 36.25

STEP 3: Convert Result to Output's Unit

36.25 Meter --> No Conversion Required

FINAL ANSWER

36.25 Meter <-- Diameter

(Calculation completed in 00.020 seconds)

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Created by Nishan Poojary

Shri Madhwa Vadiraja Institute of Technology and Management (SMVITM), Udupi

Nishan Poojary has created this Calculator and 500+ more calculators!

Verified by Rajat Vishwakarma

University Institute of Technology RGPV (UIT - RGPV), Bhopal

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< 23 Free convection Calculators

Bingham Number of Plastic Fluids from Isothermal Semi-circular Cylinder

Go Bingham Number = (Fluid Yield Stress/Plastic Viscosity)*((Diameter of Cylinder 1/(Acceleration due to Gravity*Coefficient Of Volumetric Expansion* Change in Temperature)))^(0.5)

Outside surface temperature for annular space between concentric cylinders

Go Outside Temperature = Inside Temperature-(Heat Transfer per Unit Length*((ln(Outside Diameter/Inside Diameter))/(2*pi*Thermal Conductivity)))

Inside surface temperature for annular space between concentric cylinders

Go Inside Temperature = (Heat Transfer per Unit Length*((ln(Outside Diameter/Inside Diameter))/(2*pi*Thermal Conductivity)))+Outside Temperature

Outside diameter of concentric sphere

Go Outside Diameter = Heat transfer/((Thermal Conductivity*pi*(Inside Temperature-Outside Temperature))*((Inside Diameter)/Length))

Inside diameter of concentric sphere

Go Inside Diameter = Heat transfer/((Thermal Conductivity*pi*(Inside Temperature-Outside Temperature))*((Outside Diameter)/Length))

Length of space between two concentric sphere

Go Length = (Thermal Conductivity*pi*(Inside Temperature-Outside Temperature))*((Outside Diameter*Inside Diameter)/Heat transfer)

Inside temperature of concentric sphere

Go Inside Temperature = (Heat transfer/((Thermal Conductivity*pi*(Outer Diameter*Inner Diameter)/Length)))+Outside Temperature

Length of annular space between two concentric cylinders

Go Length = ((((ln(Outer Diameter/Inner Diameter))^4)*(Rayleigh number))/(((Inner Diameter^-0.6)+(Outer Diameter^-0.6))^5))^-3

Boundary layer thickness on vertical surfaces

Go Boundary Layer Thickens = 3.93*Distance from Point to YY Axis*(Prandtl Number^(-0.5))*((0.952+Prandtl Number)^0.25)*(Local Grashof Number^(-0.25))

Thermal conductivity of fluid

Go Thermal Conductivity = Thermal Conductivity/(0.386*(((Prandtl Number)/(0.861+Prandtl Number))^0.25)*(Rayleigh Number(t))^0.25)

Diameter of rotating cylinder in fluid given Reynolds number

Go Diameter = ((Reynolds Number(w)*Kinematic Viscosity)/(pi*Rotational speed))^(1/2)

Rotational speed given Reynolds number

Go Rotational speed = (Reynolds Number(w)*Kinematic Viscosity)/(pi*Diameter^2)

Kinematic viscosity given Reynolds number based on rotational speed

Go Kinematic Viscosity = Rotational speed*pi*(Diameter^2)/Reynolds Number(w)

Prandtl number given Graetz numbber

Go Prandtl Number = Graetz Number*Length/(Reynolds Number*Diameter)

Diameter given Graetz number

Go Diameter = Graetz Number*Length/(Reynolds Number*Prandtl Number)

Length given Graetz number

Go Length = Reynolds Number*Prandtl Number*(Diameter/Graetz Number)

Convective mass transfer coefficient at distance X from leading edge

Go Convective Mass Transfer Coefficient = (2*Thermal Conductivity)/Boundary Layer Thickens

Diameter at which turbulence starts

Go Diameter = (((5*10^5)*Kinematic Viscosity)/(Rotational speed))^1/2

Kinematic viscosity of fluid

Go Kinematic Viscosity = (Rotational speed*Diameter^2)/(5*10^5)

Rotational speed of disc

Go Rotational speed = (5*10^5)*Kinematic Viscosity/(Diameter^2)

Outside radius from gap length

Go Outer Radius = Gap length+Inside Radius

Inside radius from gap length

Go Inside Radius = Outer Radius-Gap length

Gap length

Go Gap length = Outer Radius-Inside Radius

Diameter at which turbulence starts Formula

Diameter = (((5*10^5)*Kinematic Viscosity)/(Rotational speed))^1/2
D = (((5*10^5)*ν)/(w))^1/2

What is convection

Convection is the process of heat transfer by the bulk movement of molecules within fluids such as gases and liquids. The initial heat transfer between the object and the fluid takes place through conduction, but the bulk heat transfer happens due to the motion of the fluid.

Convection is the process of heat transfer in fluids by the actual motion of matter.
It happens in liquids and gases.
It may be natural or forced.
It involves a bulk transfer of portions of the fluid.

How to Calculate Diameter at which turbulence starts?

Diameter at which turbulence starts calculator uses Diameter = (((5*10^5)*Kinematic Viscosity)/(Rotational speed))^1/2 to calculate the Diameter, The Diameter at which turbulence starts formula is defined as a straight line passing from side to side through the centre of a. Diameter is denoted by D symbol.

How to calculate Diameter at which turbulence starts using this online calculator? To use this online calculator for Diameter at which turbulence starts, enter Kinematic Viscosity (ν) & Rotational speed (w) and hit the calculate button. Here is how the Diameter at which turbulence starts calculation can be explained with given input values -> 36.25 = (((5*10^5)*0.000725)/(5))^1/2.

FAQ

What is Diameter at which turbulence starts?

The Diameter at which turbulence starts formula is defined as a straight line passing from side to side through the centre of a and is represented as D = (((5*10^5)*ν)/(w))^1/2 or Diameter = (((5*10^5)*Kinematic Viscosity)/(Rotational speed))^1/2. The kinematic Viscosity is an atmospheric variable defined as the ratio between the dynamic viscosity μ and the density ρ of the fluid & Rotational speed the number of turns of the object divided by time, specified as revolutions per minute.

How to calculate Diameter at which turbulence starts?

The Diameter at which turbulence starts formula is defined as a straight line passing from side to side through the centre of a is calculated using Diameter = (((5*10^5)*Kinematic Viscosity)/(Rotational speed))^1/2. To calculate Diameter at which turbulence starts, you need Kinematic Viscosity (ν) & Rotational speed (w). With our tool, you need to enter the respective value for Kinematic Viscosity & Rotational speed 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 Diameter?

In this formula, Diameter uses Kinematic Viscosity & Rotational speed. We can use 2 other way(s) to calculate the same, which is/are as follows -

Diameter = Graetz Number*Length/(Reynolds Number*Prandtl Number)
Diameter = ((Reynolds Number(w)*Kinematic Viscosity)/(pi*Rotational speed))^(1/2)

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