Reynolds Number and Dynamic ViscosityWatch

Thread starter 4 years ago
#1
Hi all,

I thought this would be transferrable to the Chemistry thread as the Physics thread doesn't seem very active these days.

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
0
4 years ago
#2
(Original post by Mutleybm1996)
Hi all,

I thought this would be transferrable to the Chemistry thread as the Physics thread doesn't seem very active these days.

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
Generally errors above the order of magnitude are not Ok... What units are you using for glycerol density? the density should be units Kg/m^3. Do a units check and see if that changes your answer to being in the right range of order of magnitude. 104 is way too high for glycerol.
0
Thread starter 4 years ago
#3
(Original post by natninja)
Generally errors above the order of magnitude are not Ok... What units are you using for glycerol density? the density should be units Kg/m^3. Do a units check and see if that changes your answer to being in the right range of order of magnitude. 104 is way too high for glycerol.
sorry, it was a rough table for TSR, yes kg/m^3 are the units. I checked my answers by using this calculator:

http://www.pipeflowcalculations.com/reynolds/
and this one
http://www.engineeringtoolbox.com/re...ber-d_237.html

it led to the same answer
0
4 years ago
#4
(Original post by Mutleybm1996)
sorry, it was a rough table for TSR, yes kg/m^3 are the units. I checked my answers by using this calculator:

http://www.pipeflowcalculations.com/reynolds/
and this one
http://www.engineeringtoolbox.com/re...ber-d_237.html

it led to the same answer
weird...
0
X

new posts
Latest
My Feed

Oops, nobody has postedin the last few hours.

Why not re-start the conversation?

see more

See more of what you like onThe Student Room

You can personalise what you see on TSR. Tell us a little about yourself to get started.

University open days

• Cranfield University
Cranfield Forensic MSc Programme Open Day Postgraduate
Thu, 25 Apr '19
• University of the Arts London
Open day: MA Footwear and MA Fashion Artefact Postgraduate
Thu, 25 Apr '19
• Cardiff Metropolitan University
Undergraduate Open Day - Llandaff Campus Undergraduate
Sat, 27 Apr '19

Poll

Join the discussion

Have you registered to vote?

Yes! (213)
39.3%
No - but I will (38)
7.01%
No - I don't want to (36)
6.64%
No - I can't vote (<18, not in UK, etc) (255)
47.05%