# Reynolds Number and Dynamic ViscosityWatch

#1
I'm conducting an experiment into the Dynamic Viscosity of Glycerol and i'm trying to calculate the Reynolds number at temperatures from 25-80 degrees C. I'm aware that for Stoke's Flow to occur, the Reynolds number needs to be <1, however even using the standard results the Reynolds number is still 104, is this okay? Nothing on the internet seems to point me towards a decent conclusion.

Thank you,
please see attached a copy of my results

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0
4 years ago
#2
What exactly is the aim of the experiment?
What are you trying to find a value for?.
You can get by with a Reynolds number up to about 10 and still use Stokes Law.
So the experiment is ok up to 50 degs C by your reckoning.
0
#3
(Original post by Stonebridge)
What exactly is the aim of the experiment?
What are you trying to find a value for?.
You can get by with a Reynolds number up to about 10 and still use Stokes Law.
So the experiment is ok up to 50 degs C by your reckoning.
Just calculate the dynamic viscosity of Glycerol(99%) using a ball bearing and heating the glycerol to those temperatures. I'm just trying to find a way to explain the science and everywhere says stokes law needs to be <1, others say lamina flow is <2400 etc and it's just a but confusing after a few days of working on it for hours.

Could you point me towards a website which states that it can be used up to Re=10? so that I can show my teacher, he's convinced it's 1. The 104 looks really high, and this is using standard results from here: http://msdssearch.dow.com/webapps/in....google.co.uk/

I can't find the exact website but it was from a scientific report.

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0
4 years ago
#4
I found it here
http://en.m.wikipedia.org/wiki/Reyno...ere_in_a_fluid
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