Re: Speed Of Sound In Slurries
For transient analysis in slurry systems at moderate solids concentrations, I find that Hugget's equation for wave celerity in slurries is pretty good. Best bet is to look at the source reference that also gives some typical material properties for some solids. The reference is:
Huggett, A.G. (1991) "Transient Pipe Flow Behaviour" Slurry Handling: Design of Solid Liquid Systems, edited by N P Brown and N I Heywood, Elsevier, London. ■
Re: Speed Of Sound In Slurries
Angus,
Thanks for that, I will get the book. I have been collecting articles and useful webs sites and found that Queensland Civil Engineering dept have made available free software for water hammer. I'm trying to validate some the results.
Thanks once again.
Dick ■
Re: Speed Of Sound In Slurries
It might be thought that a slurry which is denser than water would enable pressure waves to be transmitted more rapidly than in water and that in consequence the severity of hydraulic shock caused by a pressure disturbance would be enhanced. In practice, however, this does not occur: the presence of solid particles has been known to cause attenuation of the pressure wave as observed by some of the studies. It would be dangerous, however, to rely upon the presence of solids to damp out pressure waves, as cases are on record of water hammer occuring in slurry pipelines. It is therefore recommended that similar provisions for the avoidance of water hammer are made in the design and operation of solids pipelines as would be made for pipelines carrying water, e.g. the fitting of air vessels and means to prevent the rapid closure of valves.
Regards
D.R. Kaushal ■
Speed of sound in slurries
I'm doing some water hammer calculations for a pipeline system and wondered whether the speed of sound in a slurry is different to that of water. The slurry in question is 30% gypsum in water.
My initial thoughts are that it makes no difference, because the solids in the slurry are incompressible, does anyone know better? ■