Flow straightener Flow straightener Gunman (Automotive) (OP) 25 Jan 11 10:53 I'm trying to scheme up a flow straightener, and I'm sure there is some "rule of thumb" for the length of the straightener vs. the ID of the flow path, but I haven't found anything yet.Any thoughts on this? if fluid type matters, I'm dealing with water.Thanks, Dave -DaveNX 188.8.131.52mp7 RE: Flow straightener rb1957 (Aerospace) 25 Jan 11 11:23 my sense is that it'd depend on the amount of vorticity you're trying to straighten RE: Flow straightener btrueblood (Mechanical) 25 Jan 11 13:36 Or what you are trying to straighten it for. ISO 5167 shows various types of flow straightening devices for use with square-edge orifice plates. RE: Flow straightener Gunman (Automotive) (OP) 25 Jan 11 16:13 Thanks, I'll take a look at that ISO. -DaveNX 184.108.40.206mp7 RE: Flow straightener IceMan30 (Military) 2 Feb 11 16:23 "Low-Speed Wind Tunnel Testing," by Barlow, Rae, and Pope should have a lot of useful information. Don't have the book in front of me, but I recall it has some good discussion on flow quality, straightening, etc.The exact fluid shouldn't really matter - so long as you adjust methods for the fluid properties you're concerned with (water in your case). In general, you should be able to do a library/interweb search for low-speed, generally low-Reynolds # methods for flow quality control. Good luck!