the flow rate to cause turbulence and mixing depends on the ID of the tubing.
For a 1/4 in ID, I would normally run at 57.3 ml/min or better.
for 1/8 in, 15 ml/min likely be OK with mixers and bends upstream of the sensor.
that is for a near constant flow.
If you have a pulsating flow (some pumps are like that) you can get by with
flows a little lower
than with constant flow.
I would have all the tubing insulated or the whole thing in a constant temp
box/room.
It is not just the temperatures you have to be concerned with, it is also the
rate of heat flow.
(drafts, humidity changes......)
D2
Date: Wed, 19 Jun 2013 16:41:28 -0400
Subject: Re: [Vo]:MFMP has built a flow calorimeter
From: jedrothw...@gmail.com
To: vortex-l@eskimo.com
DJ Cravens <djcrav...@hotmail.com> wrote:
Be sure to use inline static mixers up stream from your sensors.
I don't see that stated.
Yeah, I thought about those in-line mixers you use when I read this.
You should go on the MFMP site and recommend those things. Give them the part
name and number.
15 ml/min. is too slow. They need mixing. Even the in-line mixers may not be
enough. I think a faster flow rate might be advisable. As I recall, McKubre
once told me it should never be less than 30 ml. Or was it 60? 1 per second?
- Jed
