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Boundary Layer Thickness of Laminar Sublayer Formula

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Boundary Layer Thickness is the distance normal to the wall to a point where the flow velocity has essentially reached the 'asymptotic' velocity. Check FAQs

δ = \frac{11.6 \cdot v'}{V'}

δ - Boundary Layer Thickness?v' - Kinematic Viscosity?V_' - Shear Velocity?

Boundary Layer Thickness of Laminar Sublayer Example

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Here is how the Boundary Layer Thickness of Laminar Sublayer equation looks like with Values.

Here is how the Boundary Layer Thickness of Laminar Sublayer equation looks like with Units.

Here is how the Boundary Layer Thickness of Laminar Sublayer equation looks like.

0.0014 = \frac{11.6 \cdot 7.25}{6}

0.0014m = \frac{11.6 \cdot 7.25St}{6m/s}

0.0014 = \frac{11.6 \cdot 7.25}{6}

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Boundary Layer Thickness of Laminar Sublayer Solution

Follow our step by step solution on how to calculate Boundary Layer Thickness of Laminar Sublayer?

FIRST Step Consider the formula

δ = \frac{11.6 \cdot v'}{V'}

Next Step Substitute values of Variables

∴

δ = \frac{11.6 \cdot 7.25St}{6m/s}

Next Step Convert Units

∴

δ = \frac{11.6 \cdot 0.0007m²/s}{6m/s}

Next Step Prepare to Evaluate

∴

δ = \frac{11.6 \cdot 0.0007}{6}

Next Step Evaluate

∴

δ = 0.00140166666666667m

LAST Step Rounding Answer

∴

δ = 0.0014m

Boundary Layer Thickness of Laminar Sublayer Formula Elements

Variables

Boundary Layer Thickness

Boundary Layer Thickness is the distance normal to the wall to a point where the flow velocity has essentially reached the 'asymptotic' velocity.

Symbol: δ

Measurement: LengthUnit: m

Note: Value can be positive or negative.

Formulas to find Boundary Layer Thickness

Kinematic Viscosity

The Kinematic Viscosity is an atmospheric variable defined as the ratio between the dynamic viscosity μ and the density ρ of the fluid.

Symbol: v'

Measurement: Kinematic ViscosityUnit: St

Note: Value should be greater than 0.

Formulas to find Kinematic Viscosity

Shear Velocity

Shear velocity, also called friction velocity, is a form by which a shear stress may be re-written in units of velocity.

Symbol: V_'

Measurement: SpeedUnit: m/s

Note: Value can be positive or negative.

Formulas to find Shear Velocity

Other formulas in Turbulent Flow category

Go Shear Velocity for Turbulent Flow in Pipes

V' = \sqrt{\frac{𝜏}{ρ f}}

Go Shear Stress Developed for Turbulent Flow in Pipes

𝜏 = ρ f \cdot {V'}^{2}

Go Roughness Reynold Number for Turbulent Flow in Pipes

Re = \frac{k \cdot V'}{v'}

Go Average Height of Irregularities for Turbulent Flow in Pipes

k = \frac{v' \cdot Re}{V'}

How to Evaluate Boundary Layer Thickness of Laminar Sublayer?

Boundary Layer Thickness of Laminar Sublayer evaluator uses Boundary Layer Thickness = (11.6*Kinematic Viscosity)/(Shear Velocity) to evaluate the Boundary Layer Thickness, The Boundary Layer Thickness of Laminar Sublayer formula is defined as the distance from the wall to the point where the velocity is 99% of the “free stream” velocity. Boundary Layer Thickness is denoted by δ symbol.

How to evaluate Boundary Layer Thickness of Laminar Sublayer using this online evaluator? To use this online evaluator for Boundary Layer Thickness of Laminar Sublayer, enter Kinematic Viscosity (v') & Shear Velocity (V_') and hit the calculate button.

FAQs on Boundary Layer Thickness of Laminar Sublayer

What is the formula to find Boundary Layer Thickness of Laminar Sublayer?

The formula of Boundary Layer Thickness of Laminar Sublayer is expressed as Boundary Layer Thickness = (11.6*Kinematic Viscosity)/(Shear Velocity). Here is an example- 0.001402 = (11.6*0.000725)/(6).

How to calculate Boundary Layer Thickness of Laminar Sublayer?

With Kinematic Viscosity (v') & Shear Velocity (V_') we can find Boundary Layer Thickness of Laminar Sublayer using the formula - Boundary Layer Thickness = (11.6*Kinematic Viscosity)/(Shear Velocity).

Can the Boundary Layer Thickness of Laminar Sublayer be negative?

Yes, the Boundary Layer Thickness of Laminar Sublayer, measured in Length can be negative.

Which unit is used to measure Boundary Layer Thickness of Laminar Sublayer?

Boundary Layer Thickness of Laminar Sublayer is usually measured using the Meter[m] for Length. Millimeter[m], Kilometer[m], Decimeter[m] are the few other units in which Boundary Layer Thickness of Laminar Sublayer can be measured.

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