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Permeability Number Formula

GoPermeability Number or Standard Specimen Formula

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Permeability Number is the rate of flow of air passing through a standard specimen under a standard pressure. Check FAQs

PN = \frac{V air \cdot h s}{ρ \cdot A \cdot t p}

PN - Permeability Number?V_air - Volume of Air in Casting?h_s - Height of Specimen?ρ - Air Pressure on Wall?A - Cross-Sectional Area of Specimen?t_p - Time?

Permeability Number Example

With values

With units

Only example

Here is how the Permeability Number equation looks like with Values.

Here is how the Permeability Number equation looks like with Units.

Here is how the Permeability Number equation looks like.

4.3617 = \frac{0.0017 \cdot 6}{0.0385 \cdot 0.002 \cdot 3}

4.3617H/m = \frac{0.0017m³ \cdot 6m}{0.0385kgf/m² \cdot 0.002m² \cdot 3s}

4.3617 = \frac{0.0017 \cdot 6}{0.0385 \cdot 0.002 \cdot 3}

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Permeability Number Solution

Follow our step by step solution on how to calculate Permeability Number?

FIRST Step Consider the formula

PN = \frac{V air \cdot h s}{ρ \cdot A \cdot t p}

Next Step Substitute values of Variables

∴

PN = \frac{0.0017m³ \cdot 6m}{0.0385kgf/m² \cdot 0.002m² \cdot 3s}

Next Step Convert Units

∴

PN = \frac{0.0017m³ \cdot 6m}{0.3776Pa \cdot 0.002m² \cdot 3s}

Next Step Prepare to Evaluate

∴

PN = \frac{0.0017 \cdot 6}{0.3776 \cdot 0.002 \cdot 3}

Next Step Evaluate

∴

PN = 4.36165367399915H/m

LAST Step Rounding Answer

∴

PN = 4.3617H/m

Permeability Number Formula Elements

Variables

Permeability Number

Permeability Number is the rate of flow of air passing through a standard specimen under a standard pressure.

Symbol: PN

Measurement: Magnetic PermeabilityUnit: H/m

Note: Value should be greater than 0.

Formulas to find Permeability Number

Volume of Air in Casting

Volume of Air in Casting is the amount of space occupied by air, during the pouring of molten metal. It is measured in cubic units such as cubic meters.

Symbol: V_air

Measurement: VolumeUnit: m³

Note: Value should be greater than 0.

Formulas to find Volume of Air in Casting

Height of Specimen

Height of Specimen is the vertical dimension or measurement of the specimen which can be a crucial parameter for analysis, testing.

Symbol: h_s

Measurement: LengthUnit: m

Note: Value should be greater than 0.

Formulas to find Height of Specimen

Air Pressure on Wall

Air Pressure on Wall is the pressure exerted by air on the walls in which it is confined.

Symbol: ρ

Measurement: PressureUnit: kgf/m²

Note: Value should be greater than 0.

Formulas to find Air Pressure on Wall

Cross-Sectional Area of Specimen

Cross-Sectional Area of Specimen is the measure of the surface area perpendicular to the direction of an applied force or load, often used in materials testing to calculate stress and strain.

Symbol: A

Measurement: AreaUnit: m²

Note: Value should be greater than 0.

Formulas to find Cross-Sectional Area of Specimen

Time

Time is various stages and durations throughout the casting process.

Symbol: t_p

Measurement: TimeUnit: s

Note: Value should be greater than 0.

Formulas to find Time

Other Formulas to find Permeability Number

Go Permeability Number or Standard Specimen

PN = \frac{501.28}{p c \cdot t p}

Other formulas in Permeability Number category

Go Air Pressure during Testing

ρ = \frac{V \cdot H sp}{PN \cdot A \cdot t p}

Go Cross-Sectional Area of Specimen

A = \frac{V \cdot H sp}{PN \cdot ρ \cdot t p}

Go Time Taken during Testing

t p = \frac{V \cdot H sp}{PN \cdot ρ \cdot A}

Go Time Taken in Standard Specimen Testing

t p = \frac{501.28}{PN \cdot p c}

How to Evaluate Permeability Number?

Permeability Number evaluator uses Permeability Number = (Volume of Air in Casting*Height of Specimen)/(Air Pressure on Wall*Cross-Sectional Area of Specimen*Time) to evaluate the Permeability Number, The Permeability Number is the rate of flow of air passing through a standard specimen under a standard pressure. Permeability Number is denoted by PN symbol.

How to evaluate Permeability Number using this online evaluator? To use this online evaluator for Permeability Number, enter Volume of Air in Casting (V_air), Height of Specimen (h_s), Air Pressure on Wall (ρ), Cross-Sectional Area of Specimen (A) & Time (t_p) and hit the calculate button.

FAQs on Permeability Number

What is the formula to find Permeability Number?

The formula of Permeability Number is expressed as Permeability Number = (Volume of Air in Casting*Height of Specimen)/(Air Pressure on Wall*Cross-Sectional Area of Specimen*Time). Here is an example- 4.361654 = (0.001669*6)/(0.377556024999973*0.002027*3).

How to calculate Permeability Number?

With Volume of Air in Casting (V_air), Height of Specimen (h_s), Air Pressure on Wall (ρ), Cross-Sectional Area of Specimen (A) & Time (t_p) we can find Permeability Number using the formula - Permeability Number = (Volume of Air in Casting*Height of Specimen)/(Air Pressure on Wall*Cross-Sectional Area of Specimen*Time).

What are the other ways to Calculate Permeability Number?

Here are the different ways to Calculate Permeability Number-

Permeability Number=501.28/(Pressure in Casting*Time)

Can the Permeability Number be negative?

No, the Permeability Number, measured in Magnetic Permeability cannot be negative.

Which unit is used to measure Permeability Number?

Permeability Number is usually measured using the Henry per Meter[H/m] for Magnetic Permeability. Henry per Centimeter[H/m], Henry per Kilometer[H/m] are the few other units in which Permeability Number can be measured.

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Permeability Number Formula

​GoPermeability Number or Standard Specimen Formula

Permeability Number Example

Permeability Number Solution

Permeability Number Formula Elements

Other Formulas to find Permeability Number

Other formulas in Permeability Number category

How to Evaluate Permeability Number?

FAQs on Permeability Number

Variable Name

GoPermeability Number or Standard Specimen Formula