Talk:Knudsen equation

	Physics portal This article is within the scope of WikiProject Physics, a collaborative effort to improve the coverage of Physics on Wikipedia. If you would like to participate, please visit the project page, where you can join the discussion and see a list of open tasks.PhysicsWikipedia:WikiProject PhysicsTemplate:WikiProject Physicsphysics articles
Low	This article has been rated as Low-importance on the project's importance scale.
	This article is supported by Fluid Dynamics Taskforce.

I agree. Something wrong in this value. The greater the ratio "mean free path to diameter" is, the closer we get to molecular flow, and the molecules interact with the walls and not with each other. — Preceding unsigned comment added by Navidor (talk • contribs) 15:58, 27 February 2012 (UTC)[reply]

When the mean free path of the molecules in the gas is less than or equal to the diameter of the tube, the molecules will interact more often with the walls of the tube than with each other.

Shouldn't that be, when the mean free path is more than the diameter of the tube they interact more with the walls than with each other? — Preceding unsigned comment added by 109.145.82.127 (talk) 01:08, 19 February 2012 (UTC)[reply]

problems

the equation for the cylindrical tube is quite strange. I have found it elsewhere in the literature without a proper explanation of the symbols and therefore I arrived here for this explanation. But the explanation given here seems untenable. Q is declared the volume flow as volume*pressure/time, but this is a power, not a volume flow. The right side is a force if rho1 is dimensionless, something with mass^0.5 if rho1 is a mass density, something with an half-integer power of the length if a numeric density. In no case is a volume flow nor a power. pietro 151.29.39.54 (talk) 19:43, 15 November 2024 (UTC)[reply]