Hydrodynamic entry length Calculator

✖Diameter is a straight line passing from side to side through the center of a body or figure, especially a circle or sphere.ⓘ Diameter [D]			+10% -10%
✖Reynolds Number Dia is the ratio of inertial forces to viscous forces.ⓘ Reynolds Number Dia [Re_D]			+10% -10%

✖Length is the measurement or extent of something from end to end.ⓘ Hydrodynamic entry length [L]

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Hydrodynamic entry length Solution

STEP 0: Pre-Calculation Summary

Formula Used

Length = 0.04*Diameter*Reynolds Number Dia
L = 0.04*D*Re_D
This formula uses 3 Variables

Variables Used

Length - (Measured in Meter) - Length is the measurement or extent of something from end to end.
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.
Reynolds Number Dia - Reynolds Number Dia is the ratio of inertial forces to viscous forces.

STEP 1: Convert Input(s) to Base Unit

Diameter: 10 Meter --> 10 Meter No Conversion Required
Reynolds Number Dia: 1600 --> No Conversion Required

STEP 2: Evaluate Formula

Substituting Input Values in Formula

L = 0.04*D*Re_D --> 0.04*10*1600

Evaluating ... ...

L = 640

STEP 3: Convert Result to Output's Unit

640 Meter --> No Conversion Required

FINAL ANSWER

640 Meter <-- Length

(Calculation completed in 00.004 seconds)

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Created by Nishan Poojary

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

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National Institute Of Technology (NIT), Hamirpur

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< Laminar Flow Calculators

Diameter of hydrodynamic entry tube

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

Hydrodynamic entry length

LaTeX Go Length = 0.04*Diameter*Reynolds Number Dia

Darcy friction factor

LaTeX Go Darcy Friction Factor = 64/Reynolds Number Dia

Reynolds Number given Darcy Friction Factor

LaTeX Go Reynolds Number = 64/Darcy Friction Factor

Hydrodynamic entry length Formula

LaTeX Go

Length = 0.04*Diameter*Reynolds Number Dia
L = 0.04*D*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 Hydrodynamic entry length?

Hydrodynamic entry length calculator uses Length = 0.04*Diameter*Reynolds Number Dia to calculate the Length, The Hydrodynamic entry length formula is defined as the duct length required to achieve a duct section maximum velocity of 99% of the corresponding fully developed magnitude when the entering flow is uniform. Length is denoted by L symbol.

How to calculate Hydrodynamic entry length using this online calculator? To use this online calculator for Hydrodynamic entry length, enter Diameter (D) & Reynolds Number Dia (Re_D) and hit the calculate button. Here is how the Hydrodynamic entry length calculation can be explained with given input values -> 640 = 0.04*10*1600.

FAQ

What is Hydrodynamic entry length?

The Hydrodynamic entry length formula is defined as the duct length 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 L = 0.04*D*Re_D or Length = 0.04*Diameter*Reynolds Number Dia. Diameter is a straight line passing from side to side through the center of a body or figure, especially a circle or sphere & Reynolds Number Dia is the ratio of inertial forces to viscous forces.

How to calculate Hydrodynamic entry length?

The Hydrodynamic entry length formula is defined as the duct length 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 Length = 0.04*Diameter*Reynolds Number Dia. To calculate Hydrodynamic entry length, you need Diameter (D) & Reynolds Number Dia (Re_D). With our tool, you need to enter the respective value for Diameter & 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 Length?

In this formula, Length uses Diameter & Reynolds Number Dia. We can use 1 other way(s) to calculate the same, which is/are as follows -

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

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