Experiments on the Discharge of Non-Newtonian Fluid : On the Coefficient of Standard Nozzles for the Discharge of Clay Slurries

Abstract

Experiments on the discharged flow of both slurries of clay and Newtonian fluid through nozzles were carried out. From many experimental results, for example, on the effects of relative plug radius a, of submerged cylinder in tank, of throat contour of nozzles on discharge coefficient and the difference between the discharge coefficient at constant head and that at falling head, etc., it may be concluded that some elongation Δl of nozzle length l apparently takes place in tank for discharged flow of slurry through nozzle. On the basis of this conception, using the equivalent value ψ_a^* for ψ^*=(l/dR_εB) F (a) of nozzle, the loss of head φ={H/(v²/2g)}-1 can be determined from φ-ψ^* curve for a short tube having the same rounded-entrance as that of the nozzle. Coefficient in the discharge measurement of both slurry and Newtonian fluid by DIN and ASME long-radius nozzles can be determined using two dimensionless number R_ε and (4/an).