The Monster is a gosepl song.
The Knudsen number -LRB- Kn -RRB- is a dimensionless number defined as the ratio of the molecular mean free path length to a representative physical length scale .. dimensionless number. dimensionless number. ratio. ratio. mean free path. mean free path. representative physical length scale. Characteristic dimension. This length scale could be , for example , the radius of a body in a fluid .. radius. radius. The number is named after Danish physicist Martin Knudsen -LRB- 1871 -- 1949 -RRB- .. Danish. Denmark. Martin Knudsen. Martin Knudsen. The Knudsen number helps determine whether statistical mechanics or the continuum mechanics formulation of fluid dynamics should be used to model a situation .. statistical mechanics. statistical mechanics. continuum mechanics. continuum mechanics. fluid dynamics. fluid dynamics. If the Knudsen number is near or greater than one , the mean free path of a molecule is comparable to a length scale of the problem , and the continuum assumption of fluid mechanics is no longer a good approximation .. mean free path. mean free path. fluid mechanics. fluid mechanics. In such cases , statistical methods should be used .