The formula to calculate the Knudsen Number (Kn) is:
\[ \text{Kn} = \frac{\lambda}{L} \]
Knudsen number is a non-dimensional number used to describe the degree of departure from continuum. The Mean Free Path of Molecule is the average distance an object will move between collisions. The characteristic length of flow is a dimension like diameter is related as characteristic length.
Let's assume the following values:
Using the formula:
\[ \text{Kn} = \frac{0.0002}{0.11} \approx 0.00181818181818182 \]
The Knudsen Number is approximately 0.00181818181818182.
| Mean Free Path (Meter) | Characteristic Length (Meter) | Knudsen Number |
|---|---|---|
| 0.0001 | 0.11 | 0.000909090909091 |
| 0.00015 | 0.11 | 0.001363636363636 |
| 0.0002 | 0.11 | 0.001818181818182 |
| 0.00025 | 0.11 | 0.002272727272727 |