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Colburn's j-factor Formula

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The Colburn's j-factor is a dimensionless number that correlates heat transfer and fluid flow characteristics in laminar flow within tubes, aiding in thermal design calculations. Check FAQs

j H = St \cdot {(Pr)}^{\frac{2}{3}}

j_H - Colburn's j-factor?St - Stanton Number?Pr - Prandtl Number?

Colburn's j-factor Example

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Here is how the Colburn's j-factor equation looks like with Values.

Here is how the Colburn's j-factor equation looks like with Units.

Here is how the Colburn's j-factor equation looks like.

0.005 = 0.0064 \cdot {(0.7)}^{\frac{2}{3}}

0.005 = 0.0064 \cdot {(0.7)}^{\frac{2}{3}}

0.005 = 0.0064 \cdot {(0.7)}^{\frac{2}{3}}

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Colburn's j-factor Solution

Follow our step by step solution on how to calculate Colburn's j-factor?

FIRST Step Consider the formula

j H = St \cdot {(Pr)}^{\frac{2}{3}}

Next Step Substitute values of Variables

∴

j H = 0.0064 \cdot {(0.7)}^{\frac{2}{3}}

Next Step Prepare to Evaluate

∴

j H = 0.0064 \cdot {(0.7)}^{\frac{2}{3}}

Next Step Evaluate

∴

j H = 0.00500617182857183

LAST Step Rounding Answer

∴

j H = 0.005

Colburn's j-factor Formula Elements

Variables

Colburn's j-factor

The Colburn's j-factor is a dimensionless number that correlates heat transfer and fluid flow characteristics in laminar flow within tubes, aiding in thermal design calculations.

Symbol: j_H

Measurement: NAUnit: Unitless

Note: Value can be positive or negative.

Formulas to find Colburn's j-factor

Stanton Number

The Stanton Number is a dimensionless quantity that measures the heat transfer efficiency in laminar flow conditions within tubes, indicating the relationship between heat transfer and fluid flow.

Symbol: St

Measurement: NAUnit: Unitless

Note: Value can be positive or negative.

Formulas to find Stanton Number

Prandtl Number

The Prandtl Number is a dimensionless quantity that relates the rate of momentum diffusion to thermal diffusion in fluid flow, indicating the relative importance of convection and conduction.

Symbol: Pr

Measurement: NAUnit: Unitless

Note: Value should be greater than 0.

Formulas to find Prandtl Number

Other formulas in Laminar Flow category

Go Darcy friction factor

df = \frac{64}{Re D}

Go Reynolds Number given Darcy Friction Factor

Re D = \frac{64}{df}

Go Hydrodynamic entry length

L = 0.04 \cdot D hd \cdot Re D

Go Diameter of hydrodynamic entry tube

D hd = \frac{L}{0.04 \cdot Re D}

How to Evaluate Colburn's j-factor?

Colburn's j-factor evaluator uses Colburn's j-factor = Stanton Number*(Prandtl Number)^(2/3) to evaluate the Colburn's j-factor, Colburn's j-factor formula is defined as a dimensionless number that characterizes the heat and mass transfer performance in laminar flow within tubes, providing insights into the efficiency of thermal and fluid processes. Colburn's j-factor is denoted by j_H symbol.

How to evaluate Colburn's j-factor using this online evaluator? To use this online evaluator for Colburn's j-factor, enter Stanton Number (St) & Prandtl Number (Pr) and hit the calculate button.

FAQs on Colburn's j-factor

What is the formula to find Colburn's j-factor?

The formula of Colburn's j-factor is expressed as Colburn's j-factor = Stanton Number*(Prandtl Number)^(2/3). Here is an example- 0.005006 = 0.00635*(0.7)^(2/3).

How to calculate Colburn's j-factor?

With Stanton Number (St) & Prandtl Number (Pr) we can find Colburn's j-factor using the formula - Colburn's j-factor = Stanton Number*(Prandtl Number)^(2/3).

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Colburn's j-factor Formula

Colburn's j-factor Example

Colburn's j-factor Solution

Colburn's j-factor Formula Elements

Other formulas in Laminar Flow category

How to Evaluate Colburn's j-factor?

FAQs on Colburn's j-factor

Variable Name