Do a google search on Heywood and slurry. Niogel Heyward has poublished some interesting papers on the subject. Other authors include Boger, Wasp, Jacobs,Thomas, Wilson and Addie. Apologies to those leaned people I havent listed who frely publish their papers on the net.
The BHRA in the UK also have numerous papers however you will need to pay for their conference papers.
You might also try the pump companies such as Warman, Geho, Wirth, TKL, Gallagher, Ash etc.