Reference Viscosity Calculator

✖Emissivity is the ability of an object to emit infrared energy. Emissivity can have a value from 0 (shiny mirror) to 1.0 (blackbody). Most organic or oxidized surfaces have emissivity close to 0.95.ⓘ Emissivity [ε]			+10% -10%
✖Freestream Density is the mass per unit volume of air far upstream of an aerodynamic body at a given altitude.ⓘ Freestream Density [ρ_∞]			+10% -10%
✖The Freestream Velocity is the velocity of air far upstream of an aerodynamic body, that is before the body has a chance to deflect, slow down or compress the air.ⓘ Freestream Velocity [V_∞]			+10% -10%
✖Radius of Nose is any of the line segments from its center to its perimeter, and in more modern usage, it is also their length.ⓘ Radius of Nose [r_nose]			+10% -10%

✖The Dynamic Viscosity of a fluid is the measure of its resistance to flow when an external force is applied.ⓘ Reference Viscosity [μ_viscosity]

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Reference Viscosity Solution

STEP 0: Pre-Calculation Summary

Formula Used

Dynamic Viscosity = Emissivity^2*Freestream Density*Freestream Velocity*Radius of Nose
μ_viscosity = ε^2*ρ_∞*V_∞*r_nose
This formula uses 5 Variables

Variables Used

Dynamic Viscosity - (Measured in Pascal Second) - The Dynamic Viscosity of a fluid is the measure of its resistance to flow when an external force is applied.
Emissivity - Emissivity is the ability of an object to emit infrared energy. Emissivity can have a value from 0 (shiny mirror) to 1.0 (blackbody). Most organic or oxidized surfaces have emissivity close to 0.95.
Freestream Density - (Measured in Kilogram per Cubic Meter) - Freestream Density is the mass per unit volume of air far upstream of an aerodynamic body at a given altitude.
Freestream Velocity - (Measured in Meter per Second) - The Freestream Velocity is the velocity of air far upstream of an aerodynamic body, that is before the body has a chance to deflect, slow down or compress the air.
Radius of Nose - (Measured in Meter) - Radius of Nose is any of the line segments from its center to its perimeter, and in more modern usage, it is also their length.

STEP 1: Convert Input(s) to Base Unit

Emissivity: 0.948 --> No Conversion Required
Freestream Density: 1.17 Kilogram per Cubic Meter --> 1.17 Kilogram per Cubic Meter No Conversion Required
Freestream Velocity: 68 Meter per Second --> 68 Meter per Second No Conversion Required
Radius of Nose: 0.49 Meter --> 0.49 Meter No Conversion Required

STEP 2: Evaluate Formula

Substituting Input Values in Formula

μ_viscosity = ε^2*ρ_∞*V_∞*r_nose --> 0.948^2*1.17*68*0.49

Evaluating ... ...

μ_viscosity = 35.0354362176

STEP 3: Convert Result to Output's Unit

35.0354362176 Pascal Second -->350.354362176 Poise (Check conversion here)

FINAL ANSWER

350.354362176 ≈ 350.3544 Poise <-- Dynamic Viscosity

(Calculation completed in 00.004 seconds)

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Created by Sanjay Krishna

Amrita School of Engineering (ASE), Vallikavu

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PSG College of Technology (PSGCT), Coimbatore

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< Computational Fluid Dynamic Solutions Calculators

Emissivity

LaTeX Go Emissivity = sqrt(Dynamic Viscosity/(Freestream Density*Freestream Velocity*Radius of Nose))

Freestream Velocity

LaTeX Go Freestream Velocity = Dynamic Viscosity/(Emissivity^2*Freestream Density*Radius of Nose)

Freestream Density

LaTeX Go Freestream Density = Dynamic Viscosity/(Emissivity^2*Freestream Velocity*Radius of Nose)

Reference Viscosity

LaTeX Go Dynamic Viscosity = Emissivity^2*Freestream Density*Freestream Velocity*Radius of Nose

Reference Viscosity Formula

LaTeX Go

Dynamic Viscosity = Emissivity^2*Freestream Density*Freestream Velocity*Radius of Nose
μ_viscosity = ε^2*ρ_∞*V_∞*r_nose

What is emissivity?

Emissivity is the measure of an object's ability to emit infrared energy. Emitted energy indicates the temperature of the object. Emissivity can have a value from 0.

How to Calculate Reference Viscosity?

Reference Viscosity calculator uses Dynamic Viscosity = Emissivity^2*Freestream Density*Freestream Velocity*Radius of Nose to calculate the Dynamic Viscosity, The Reference viscosity formula is defined as the product of freestream density, freestream velocity, and the universal gas constant. Dynamic Viscosity is denoted by μ_viscosity symbol.

How to calculate Reference Viscosity using this online calculator? To use this online calculator for Reference Viscosity, enter Emissivity (ε), Freestream Density (ρ_∞), Freestream Velocity (V_∞) & Radius of Nose (r_nose) and hit the calculate button. Here is how the Reference Viscosity calculation can be explained with given input values -> 3518.342 = 0.948^2*1.17*68*0.49.

FAQ

What is Reference Viscosity?

The Reference viscosity formula is defined as the product of freestream density, freestream velocity, and the universal gas constant and is represented as μ_viscosity = ε^2*ρ_∞*V_∞*r_nose or Dynamic Viscosity = Emissivity^2*Freestream Density*Freestream Velocity*Radius of Nose. Emissivity is the ability of an object to emit infrared energy. Emissivity can have a value from 0 (shiny mirror) to 1.0 (blackbody). Most organic or oxidized surfaces have emissivity close to 0.95, Freestream Density is the mass per unit volume of air far upstream of an aerodynamic body at a given altitude, The Freestream Velocity is the velocity of air far upstream of an aerodynamic body, that is before the body has a chance to deflect, slow down or compress the air & Radius of Nose is any of the line segments from its center to its perimeter, and in more modern usage, it is also their length.

How to calculate Reference Viscosity?

The Reference viscosity formula is defined as the product of freestream density, freestream velocity, and the universal gas constant is calculated using Dynamic Viscosity = Emissivity^2*Freestream Density*Freestream Velocity*Radius of Nose. To calculate Reference Viscosity, you need Emissivity (ε), Freestream Density (ρ_∞), Freestream Velocity (V_∞) & Radius of Nose (r_nose). With our tool, you need to enter the respective value for Emissivity, Freestream Density, Freestream Velocity & Radius of Nose 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 Dynamic Viscosity?

In this formula, Dynamic Viscosity uses Emissivity, Freestream Density, Freestream Velocity & Radius of Nose. We can use 1 other way(s) to calculate the same, which is/are as follows -

Dynamic Viscosity = Emissivity^2*Freestream Density*sqrt(Reference Temperature)*Radius of Nose

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