Non newtonian pressure drop
Non newtonian pressure drop
(OP)
Good morning,
I have to pump a non-newtonian fluid (an emulsion). I know some lab properties of the fluids (enough to estimate the apparent viscosity) but I'm not sure of what set of equations I should use. Do you have any good reference where I can find simplified equations for make a good estimation of pressure drop in pipes for this kind of fluids?
(pd: I have read some papers where the autors suggest to use the same equations for newtonian and non-newtonian fluis, changing only the viscosity. What do you think?)
Regards,
lij.
I have to pump a non-newtonian fluid (an emulsion). I know some lab properties of the fluids (enough to estimate the apparent viscosity) but I'm not sure of what set of equations I should use. Do you have any good reference where I can find simplified equations for make a good estimation of pressure drop in pipes for this kind of fluids?
(pd: I have read some papers where the autors suggest to use the same equations for newtonian and non-newtonian fluis, changing only the viscosity. What do you think?)
Regards,
lij.





RE: Non newtonian pressure drop
Good luck,
Latexman
RE: Non newtonian pressure drop
You're right Mr Latexman, it is shear-thinning.
lij
RE: Non newtonian pressure drop
I gave an excellent reference a while back. Do a search here and in the Chemical Engineering forums and see if you find it. If not, let me know and I'll repeat it. It was a series of articles in Chemical Engineering Magazine.
Good luck,
Latexman
RE: Non newtonian pressure drop
"I am sure it can be done. I've seen it on the internet." BigInch's favorite client.
http://www.youtube.com/watch?v=hpiIWMWWVco
"Being GREEN isn't easy." Kermit
http://virtualpipeline.spaces.live.com
RE: Non newtonian pressure drop
Agree. If one takes the easy way out, there is usually a catch!
Good luck,
Latexman
RE: Non newtonian pressure drop
"I am sure it can be done. I've seen it on the internet." BigInch's favorite client.
http://www.youtube.com/watch?v=hpiIWMWWVco
"Being GREEN isn't easy." Kermit
http://virtualpipeline.spaces.live.com
RE: Non newtonian pressure drop
I have been searching in Chemical Engineering Magazine. I found this articles:
http://
ht
http://
Regards, Lij
RE: Non newtonian pressure drop
It gets tricker if your viscosity varies with time at various velocities, or has other more devious complications.
"I am sure it can be done. I've seen it on the internet." BigInch's favorite client.
http://www.youtube.com/watch?v=hpiIWMWWVco
"Being GREEN isn't easy." Kermit
http://virtualpipeline.spaces.live.com
RE: Non newtonian pressure drop
Look here:
thread378-243822: Dilatants and thixotropic liquids pump sizing considerations
Good luck,
Latexman