Diameter of hydrodynamic entry tube Calculator

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✖Length is the measurement or extent of something from end to end.ⓘ Length [L]			+10% -10%
✖Reynolds Number Dia is the ratio of inertial forces to viscous forces.ⓘ Reynolds Number Dia [Re_D]			+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 of hydrodynamic entry tube [D]

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Formula

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Diameter of hydrodynamic entry tube

Formula

`"D" = "L"/(0.04*"Re"_{"D"})`

Example

`"0.046875m"="3m"/(0.04*"1600")`

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Diameter of hydrodynamic entry tube Solution

STEP 0: Pre-Calculation Summary

Formula Used

Diameter = Length/(0.04*Reynolds Number Dia)
D = L/(0.04*Re_D)
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.
Length - (Measured in Meter) - Length is the measurement or extent of something from end to end.
Reynolds Number Dia - Reynolds Number Dia is the ratio of inertial forces to viscous forces.

STEP 1: Convert Input(s) to Base Unit

Length: 3 Meter --> 3 Meter No Conversion Required
Reynolds Number Dia: 1600 --> No Conversion Required

STEP 2: Evaluate Formula

Substituting Input Values in Formula

D = L/(0.04*Re_D) --> 3/(0.04*1600)

Evaluating ... ...

D = 0.046875

STEP 3: Convert Result to Output's Unit

0.046875 Meter --> No Conversion Required

FINAL ANSWER

0.046875 Meter <-- Diameter

(Calculation completed in 00.004 seconds)

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

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< 15 Laminar Flow Calculators

Nusselt Number by Sieder-Tate for Shorter Tubes

Go Nusselt Number = ((1.86)*((Reynolds Number)^(1/3))* ((Prandtl Number)^(1/3))* ((Diameter of Tube/Length of Cylinder)^(1/3))* ((Fluid Viscosity (at fluid bulk temperature)/Fluid Viscosity (At pipe wall temperature))^(0.14)))

Nusselt number for hydrodynamic length fully developed and thermal length still developing

Go Nusselt Number = 3.66+((0.0668*(Diameter/Length)*Reynolds Number Dia*Prandtl Number)/(1+0.04*((Diameter/Length)*Reynolds Number Dia*Prandtl Number)^0.67))

Nusselt number for simultaneous development of hydrodynamic and thermal layers

Go Nusselt Number = 3.66+((0.104*(Reynolds Number Dia*Prandtl Number*(Diameter/Length)))/(1+0.16*(Reynolds Number Dia*Prandtl Number*(Diameter/Length))^0.8))

Nusselt number for simultaneous development of hydrodynamic and thermal layers for liquids

Go Nusselt Number = 1.86*(((Reynolds Number Dia*Prandtl Number)/(Length/Diameter))^0.333)*(Dynamic Viscosity at Bulk Temperature/Dynamic Viscosity at Wall Temperature)^0.14

Nusselt number for short tube thermal development

Go Nusselt Number = 1.30*((Reynolds Number Dia*Prandtl Number)/(Length/Diameter))^0.333

Nusselt number for short lengths

Go Nusselt Number = 1.67*(Reynolds Number Dia*Prandtl Number*Diameter/Length)^0.333

Diameter of thermal entry tube

Go Diameter = Length/(0.04*Reynolds Number Dia*Prandtl Number)

Thermal entry length

Go Length = 0.04*Reynolds Number Dia*Diameter*Prandtl Number

Stanton number for Colburn analogy

Go Stanton Number = Darcy Friction Factor/(8*(Prandtl Number^0.67))

Darcy friction factor for Colburn analogy

Go Darcy Friction Factor = 8*Stanton Number*Prandtl Number^0.67

Colburn's j-factor

Go Colburn's j-factor = Stanton Number*(Prandtl Number)^(2/3)

Diameter of hydrodynamic entry tube

Go Diameter = Length/(0.04*Reynolds Number Dia)

Hydrodynamic entry length

Go Length = 0.04*Diameter*Reynolds Number Dia

Darcy friction factor

Go Darcy Friction Factor = 64/Reynolds Number Dia

Reynolds Number given Darcy Friction Factor

Go Reynolds Number = 64/Darcy Friction Factor

Diameter of hydrodynamic entry tube Formula

Diameter = Length/(0.04*Reynolds Number Dia)
D = L/(0.04*Re_D)

What is internal flow?

internal flow is a flow for which the fluid is confined by a surface. Hence the boundary layer is unable to develop without eventually being constrained. The internal flow configuration represents a convenient geometry for heating and cooling fluids used in chemical processing, environmental control, and energy conversion technologies.

An example includes flow in a pipe.

How to Calculate Diameter of hydrodynamic entry tube?

Diameter of hydrodynamic entry tube calculator uses Diameter = Length/(0.04*Reynolds Number Dia) to calculate the Diameter, The Diameter of hydrodynamic entry tube formula is defined as the minimum diameter required to achieve a duct section maximum velocity of 99% of the corresponding fully developed magnitude when the entering flow is uniform. Diameter is denoted by D symbol.

How to calculate Diameter of hydrodynamic entry tube using this online calculator? To use this online calculator for Diameter of hydrodynamic entry tube, enter Length (L) & Reynolds Number Dia (Re_D) and hit the calculate button. Here is how the Diameter of hydrodynamic entry tube calculation can be explained with given input values -> 0.046875 = 3/(0.04*1600).

FAQ

What is Diameter of hydrodynamic entry tube?

The Diameter of hydrodynamic entry tube formula is defined as the minimum diameter required to achieve a duct section maximum velocity of 99% of the corresponding fully developed magnitude when the entering flow is uniform and is represented as D = L/(0.04*Re_D) or Diameter = Length/(0.04*Reynolds Number Dia). Length is the measurement or extent of something from end to end & Reynolds Number Dia is the ratio of inertial forces to viscous forces.

How to calculate Diameter of hydrodynamic entry tube?

The Diameter of hydrodynamic entry tube formula is defined as the minimum diameter required to achieve a duct section maximum velocity of 99% of the corresponding fully developed magnitude when the entering flow is uniform is calculated using Diameter = Length/(0.04*Reynolds Number Dia). To calculate Diameter of hydrodynamic entry tube, you need Length (L) & Reynolds Number Dia (Re_D). With our tool, you need to enter the respective value for Length & Reynolds Number Dia 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 Length & Reynolds Number Dia. We can use 1 other way(s) to calculate the same, which is/are as follows -

Diameter = Length/(0.04*Reynolds Number Dia*Prandtl Number)

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