Originally Posted By: Wonko the Sane
Originally Posted By: BrentD
And we all have shotguns that we have patterned with different chokes. Clearly, different things happen in each. I am not so sure I trust fluid dynamics to tell me much of anything about chokes in guns. I trust it pretty well in garden hoses.


Good thot! And a choke is not a nozzle. The shot mass is not liquid. The choke effect is the result of a number of forces acting on a collection of discrete and interacting bodies


A nozzle does not need a divergent section unless the intent is to accelerate the flow mass beyond its sonic velocity. Well, the interaction of forces and moments on discrete particles pretty well explains all statics and dynamics. Unfortunately, that foundation gives us no information relevant to individual situations. Exactly which forces and moments are acting within the choke?

"May the force and moment be with you!" grin

DDA