Pressure drop calculation using Durand and Durand-Wasp
Pressure drop calculation using Durand and Durand-Wasp
(OP)
Greetings fellow engineers,
I would like to know, when determining the pressure loss using Durand or Durand-Wasp model, do we use the slurry density or carrier density? (for D-W, equivalent carrier)
There seems to be a disagreement among my colleagues. One argues that Durand's correlation is an expression for the slurry pressure in terms of the carrier and over-pressure due to presence of solids, the other argues that at the limit when flow velocity tends to infinity, the pressure drop for the slurry is essentially the same as that of the carrier (usually water)... so, energy for nothing!
Hopefully, someone can shed some light.
Regards,
Vincent
I would like to know, when determining the pressure loss using Durand or Durand-Wasp model, do we use the slurry density or carrier density? (for D-W, equivalent carrier)
There seems to be a disagreement among my colleagues. One argues that Durand's correlation is an expression for the slurry pressure in terms of the carrier and over-pressure due to presence of solids, the other argues that at the limit when flow velocity tends to infinity, the pressure drop for the slurry is essentially the same as that of the carrier (usually water)... so, energy for nothing!
Hopefully, someone can shed some light.
Regards,
Vincent





RE: Pressure drop calculation using Durand and Durand-Wasp
I would recommend that you get the book Slurry Transport using Centrifugal Pumps by Wilson Addie & Clift who consult to georgia iron Works Pumps. Now owned by KSB this comapny has extensive experience in slurry pipelining.
You can also get the softweare from GIW if you are a customer.
FluidFlow3 software is about to be released with a slurry module based on this work. Suggest you contact your local software agent. Contact Graeme Ashford at Accutech in Perth Australia if you need any information.
http://ww
Geoffrey D Stone FIMechE C.Eng;FIEAust CP Eng
www.waterhammer.bigblog.com.au
RE: Pressure drop calculation using Durand and Durand-Wasp
I am aware of models proposed by other researchers including Wilson et al., Lazarus et al., Shook, Roco etc.
and have spent considerable time reviewing the literature.
However, at this point, I am only interested in applying Durand/Durand-Wasp's model, if only for future comparison work with other models.
Thanks for your suggestion though, and will see if I can acquire FluidFlow3 for my firm.
Regards,
Vincent