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Local Skin-Friction Coefficient Formula

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The Local Skin-Friction Coefficient is a dimensionless quantity that characterizes the frictional force exerted by the fluid on the surface in hypersonic flow. Check FAQs

C f = \frac{2 \cdot 𝜏}{ρ e \cdot {u e}^{2}}

C_f - Local Skin-Friction Coefficient?𝜏 - Shear Stress?ρ_e - Static Density?u_e - Static Velocity?

Local Skin-Friction Coefficient Example

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Here is how the Local Skin-Friction Coefficient equation looks like with Values.

Here is how the Local Skin-Friction Coefficient equation looks like with Units.

Here is how the Local Skin-Friction Coefficient equation looks like.

0.0013 = \frac{2 \cdot 61}{1200 \cdot {8.8}^{2}}

0.0013 = \frac{2 \cdot 61Pa}{1200kg/m³ \cdot {8.8m/s}^{2}}

0.0013 = \frac{2 \cdot 61}{1200 \cdot {8.8}^{2}}

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Local Skin-Friction Coefficient Solution

Follow our step by step solution on how to calculate Local Skin-Friction Coefficient?

FIRST Step Consider the formula

C f = \frac{2 \cdot 𝜏}{ρ e \cdot {u e}^{2}}

Next Step Substitute values of Variables

∴

C f = \frac{2 \cdot 61Pa}{1200kg/m³ \cdot {8.8m/s}^{2}}

Next Step Prepare to Evaluate

∴

C f = \frac{2 \cdot 61}{1200 \cdot {8.8}^{2}}

Next Step Evaluate

∴

C f = 0.00131284435261708

LAST Step Rounding Answer

∴

C f = 0.0013

Local Skin-Friction Coefficient Formula Elements

Variables

Local Skin-Friction Coefficient

The Local Skin-Friction Coefficient is a dimensionless quantity that characterizes the frictional force exerted by the fluid on the surface in hypersonic flow.

Symbol: C_f

Measurement: NAUnit: Unitless

Note: Value can be positive or negative.

Formulas to find Local Skin-Friction Coefficient

Shear Stress

Shear Stress is force tending to cause deformation of a material by slippage along a plane or planes parallel to the imposed stress.

Symbol: 𝜏

Measurement: StressUnit: Pa

Note: Value should be greater than 0.

Formulas to find Shear Stress

Static Density

The Static Density is the density of air at a given altitude and temperature, used to model the boundary layer in hypersonic flow conditions.

Symbol: ρ_e

Measurement: DensityUnit: kg/m³

Note: Value should be greater than 0.

Formulas to find Static Density

Static Velocity

The Static Velocity is the velocity of the fluid in the boundary layer at a given point, describing the flow characteristics near the surface.

Symbol: u_e

Measurement: SpeedUnit: m/s

Note: Value should be greater than 0.

Formulas to find Static Velocity

Other formulas in Hypersonic Flow Parameters category

Go Local Shear Stress at Wall

𝜏 = 0.5 \cdot C f \cdot ρ e \cdot {u e}^{2}

Go Static Density Equation using Skin Friction Coefficient

ρ e = \frac{2 \cdot 𝜏}{C f \cdot {u e}^{2}}

Go Static Velocity Equation using Skin Friction Coefficient

u e = \sqrt{\frac{2 \cdot 𝜏}{C f \cdot ρ e}}

Go Skin Friction Coefficient for Incompressible Flow

c f = \frac{0.664}{\sqrt{Re}}

How to Evaluate Local Skin-Friction Coefficient?

Local Skin-Friction Coefficient evaluator uses Local Skin-Friction Coefficient = (2*Shear Stress)/(Static Density*Static Velocity^2) to evaluate the Local Skin-Friction Coefficient, Local Skin-Friction Coefficient formula is defined as a dimensionless quantity that characterizes the frictional force exerted by a fluid on a surface, specifically in the context of boundary layer equations for hypersonic flow, providing a crucial parameter for understanding and predicting fluid dynamics in high-speed flow regimes. Local Skin-Friction Coefficient is denoted by C_f symbol.

How to evaluate Local Skin-Friction Coefficient using this online evaluator? To use this online evaluator for Local Skin-Friction Coefficient, enter Shear Stress (𝜏), Static Density (ρ_e) & Static Velocity (u_e) and hit the calculate button.

FAQs on Local Skin-Friction Coefficient

What is the formula to find Local Skin-Friction Coefficient?

The formula of Local Skin-Friction Coefficient is expressed as Local Skin-Friction Coefficient = (2*Shear Stress)/(Static Density*Static Velocity^2). Here is an example- 0.001313 = (2*61)/(1200*8.8^2).

How to calculate Local Skin-Friction Coefficient?

With Shear Stress (𝜏), Static Density (ρ_e) & Static Velocity (u_e) we can find Local Skin-Friction Coefficient using the formula - Local Skin-Friction Coefficient = (2*Shear Stress)/(Static Density*Static Velocity^2).

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Local Skin-Friction Coefficient Formula

Local Skin-Friction Coefficient Example

Local Skin-Friction Coefficient Solution

Local Skin-Friction Coefficient Formula Elements

Other formulas in Hypersonic Flow Parameters category

How to Evaluate Local Skin-Friction Coefficient?

FAQs on Local Skin-Friction Coefficient

Variable Name