Recent content by Mechanical Farmer

I've noticed him. He commented on my last post and i replied that i was hoping he would chime in.

This is for an industrial application in a novel process. What we have currently works, but I am trying to optimize the process. To give you the jist of what I am doing, and maybe I should have started here: I have a shear thinning fluid and need to optimize the piping system design. To do...

good to know something exists that give reliable results. I googled "German flow meter manufacturer." Of course that didn't narrow down the search very much.

This might not be an issue for my application. I am trying to experimentally determine Power-Law constants (n and K) at various shear rates. I need to plot the delta P vs V dot. As long as the Volumetric flow rate is off by a consistent factor, I should get the same curve, the slope of which...

Fully aware, Any vendor that I speak with will have an NDA. I am just trying to get an idea of the direction to go in. I don't want the legal team bombarded with 20 NDA requests when there might be a select few company (like MPI) that specialize in melt instrumentation. I assume that, as a...

I'm not going to be able to give any quantitative data regarding process. Clamp on because 1) It is my experience that fewer things contacting polymer melt is better. 2) I would like to be able to use the same unit on different pipe segments of different diameter. I presume ultrasonic will...

I was looking at this one. I didn't know there was the opportunity for testing. I've asked if my instrumentation guy has an account with them.

I'm just exploring, I was looking at the E+H Pierre mentioned above but that was just based on a quick google search. We've also looked at Vega Minitrac, but no everyone is comfortable with the idea of radiation. I've asked my instrumentation guy for suggestions. This is for a special project...

Looking for recommendations for a clamp on flow meter for polymer melt. Prefer adjustable from 1" to 4" pipe size and non nuclear.

I'm still not understanding the philosophy of having to overcome yield stress at the pipe wall. I don't see what's physically happening to cause the material to yield a r<R and not at r=R I would assume that if a had a pipe of infinite diameter, I would have measurable and small layer of...

yea, this might be a whole lot more of a productive conversation without that barrier. But a lot of good info has come out of it.

Because this is a public forum and I am discussing a highly protected process. Any information regarding material feed, output, temperature, pressure, etc. could be considered violation of my Non Disclosure and subject me to both termination of employment and legal consequences. If you would...

A couple more questions here: 1: I am struggling to understand how I haven't overcome the yield stress at the pipe wall when shear is highest at the walls. 2: I assume you are making judgements about the fluid types the best and worst case based on the rheology curves. What are you seeing to...

Should velocity be in terms of reciprocal seconds? looking at v(r); n is dimensionless and r and R units are both meters and therefore cancel out, so v(r) is in the same units of vo looking at vo; R is in terms of m outside of the brackets, inside of the brackets K/mu is (Pa/m)/(Pa-s) which...