Subject	Re: fluid has max velocity at center and ZERO velocity on ed
Posted by	kZtt (zedparts.com) on February 21, 2002 at 4:08 PM
	This message has been viewed 74 times.
In Reply To	fluid has max velocity at center and ZERO velocity on edges> posted by my91z on February 21, 2002 at 03:47 PM
Message	um... I know most flow equation solutions prefer boundary flows. That's because inter-particle interactions and velocities are lowest and that means that's the lowest energy solution. What you say makes sense, but why would the boundary velocity be zero? That assumes a particular boundary condition that does not appear to apply if, say, the surface is approximately frictionless... I think a discontinuity in the velocity is allowed at the boundary since this is a interface between two different materials... isn't fluid flow a second order differential equation? So you really only need continuity on the second order derivative, and velocity is the first order derivative... Am I completely off base here? My memory isn't that great and I never really took fluid mechanics...
Follow Ups	Need new exhaust, recommendations 4 TT conversion, not 2 $'y (n/m) - CowBoy 14:23:44 02/21/02 Brullen, under $800, Stainless, X-pipe, 3" - not-hrz 14:43:57 02/21/02 3" is not as good for performance in TTZ's as 2.5" (n/m) - F8IZHIS 14:50:02 02/21/02 Oh pray tell why? (n/m) - wildestyet 15:06:15 02/21/02 Way too big...exhaust gases will have more turbulence>> - Seb 15:09:08 02/21/02 Turbulence has more to do w/ the bends than pipe diameter... - presto 15:19:59 02/21/02 strictly speaking within a straight pipe, it is better - Jefe 15:28:50 02/21/02 So fluid dynamics would suggest that 3" is better, right? (n/m) - presto 15:40:19 02/21/02 Re: strictly speaking within a straight pipe, it is better - kZtt (zedparts.com) 15:40:50 02/21/02 fluid has max velocity at center and ZERO velocity on edges> - my91z 15:47:16 02/21/02 Re: fluid has max velocity at center and ZERO velocity on ed - kZtt (zedparts.com) 16:08:46 02/21/02 it's been too long since I had the classes in school>> - my91z 16:20:24 02/21/02 yes i am currently in fluid dynamics , and that is what i - Jefe 16:34:42 02/21/02 Re: yes i am currently in fluid dynamics , and that is what - kZtt (zedparts.com) 16:55:04 02/21/02 So now that we know who our fluid dynamics guys are: - wildestyet 17:10:11 02/21/02 I don't remember why the fluid doesn't move at the wall>> - my91z 17:44:06 02/21/02 yea my book doesnt explain it at all. here is what it says: - Jefe 22:51:04 02/21/02 also, about Bernouli's equation and lower pressure>> - my91z 15:51:11 02/21/02 not that I'm a turbo expert, but it seems 3" would be better - my91z 15:33:26 02/21/02 Please provide evidence. Also, some have 2.5" Brullen. - presto 15:07:34 02/21/02 When it comes to exhaust on a turbocharged car... - wildestyet 15:43:25 02/21/02 "as easily and as quickly as possible" - F8IZHIS 17:26:57 02/21/02 From the Borla website: Bigger is not always better... - Gordo 93TT NYC 16:24:52 02/21/02 Turbocharged car is a different animal. - wildestyet 16:55:00 02/21/02 3" DP -> 3" to 2.5" TP -> 2.5" exhaust works 4my power level (n/m) - Arnel(Z32racing.com) 16:46:33 02/21/02 You know we never really made too many suggestions so... - wildestyet 17:02:50 02/21/02
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