Knudsen Number Calculator

✖The Mean Free Path of Molecule is the average distance a molecule travels between collisions with other molecules in a fluid.ⓘ Mean Free Path of Molecule [λ]			+10% -10%
✖The Characteristic Length of Flow is a representative length scale used to analyze fluid flow behavior and its effects on the surrounding environment.ⓘ Characteristic Length of Flow [L]			+10% -10%

✖The Knudsen Number is a dimensionless quantity that characterizes the relative importance of molecular mean free path to a characteristic length scale in fluid flow.ⓘ Knudsen Number [Kn]

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Knudsen Number Solution

STEP 0: Pre-Calculation Summary

Formula Used

Knudsen Number = Mean Free Path of Molecule/Characteristic Length of Flow
Kn = λ/L
This formula uses 3 Variables

Variables Used

Knudsen Number - The Knudsen Number is a dimensionless quantity that characterizes the relative importance of molecular mean free path to a characteristic length scale in fluid flow.
Mean Free Path of Molecule - (Measured in Meter) - The Mean Free Path of Molecule is the average distance a molecule travels between collisions with other molecules in a fluid.
Characteristic Length of Flow - (Measured in Meter) - The Characteristic Length of Flow is a representative length scale used to analyze fluid flow behavior and its effects on the surrounding environment.

STEP 1: Convert Input(s) to Base Unit

Mean Free Path of Molecule: 0.0002 Meter --> 0.0002 Meter No Conversion Required
Characteristic Length of Flow: 110 Millimeter --> 0.11 Meter (Check conversion here)

STEP 2: Evaluate Formula

Substituting Input Values in Formula

Kn = λ/L --> 0.0002/0.11

Evaluating ... ...

Kn = 0.00181818181818182

STEP 3: Convert Result to Output's Unit

0.00181818181818182 --> No Conversion Required

FINAL ANSWER

0.00181818181818182 ≈ 0.001818 <-- Knudsen Number

(Calculation completed in 00.004 seconds)

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< Fluid Mechanics Basics Calculators

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Knudsen Number Formula

Knudsen Number = Mean Free Path of Molecule/Characteristic Length of Flow
Kn = λ/L

What is knudsen number?

It is a non-dimensional quantity which describes the degree of departure from the continuum.

How to Calculate Knudsen Number?

Knudsen Number calculator uses Knudsen Number = Mean Free Path of Molecule/Characteristic Length of Flow to calculate the Knudsen Number, Knudsen Number formula is defined as a dimensionless quantity that characterizes the relative importance of molecular mean free path to a characteristic length scale in a fluid flow. It helps in understanding the behavior of gases in rarefied conditions and is crucial in various engineering applications. Knudsen Number is denoted by Kn symbol.

How to calculate Knudsen Number using this online calculator? To use this online calculator for Knudsen Number, enter Mean Free Path of Molecule (λ) & Characteristic Length of Flow (L) and hit the calculate button. Here is how the Knudsen Number calculation can be explained with given input values -> 0.001818 = 0.0002/0.11.

FAQ

What is Knudsen Number?

Knudsen Number formula is defined as a dimensionless quantity that characterizes the relative importance of molecular mean free path to a characteristic length scale in a fluid flow. It helps in understanding the behavior of gases in rarefied conditions and is crucial in various engineering applications and is represented as Kn = λ/L or Knudsen Number = Mean Free Path of Molecule/Characteristic Length of Flow. The Mean Free Path of Molecule is the average distance a molecule travels between collisions with other molecules in a fluid & The Characteristic Length of Flow is a representative length scale used to analyze fluid flow behavior and its effects on the surrounding environment.

How to calculate Knudsen Number?

Knudsen Number formula is defined as a dimensionless quantity that characterizes the relative importance of molecular mean free path to a characteristic length scale in a fluid flow. It helps in understanding the behavior of gases in rarefied conditions and is crucial in various engineering applications is calculated using Knudsen Number = Mean Free Path of Molecule/Characteristic Length of Flow. To calculate Knudsen Number, you need Mean Free Path of Molecule (λ) & Characteristic Length of Flow (L). With our tool, you need to enter the respective value for Mean Free Path of Molecule & Characteristic Length of Flow and hit the calculate button. You can also select the units (if any) for Input(s) and the Output as well.

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