The authors experimentally observed the pressure flow of non-Newtonian fluids between eccentric double cylinders with the inner cylinder rotating. Experiments were carried out to measure the pressure gradient, the angle of the secondary flow region and the pressure distribution on the outer cylinder using aqueous solutions of hydroxy ethyl cellulose (HEC:). Results are summarized as follows: 1) Axial flow rate was enhanced by the rotation of inner cylinder. Denote the axial flow rate Qs and Q, respectively with the inner cylinder stationary and rotating. Then the larger was the difference between Q, and Q, the larger was the effect of eccentricity.2) The angle of the secondary flow region increased with decreasing number of inner cylinder rotation and increasing axial pressure gradient. 3) Distribution of pressure on outer cylinder was affected by the axial flow rate, radius ratio and eccentricity. 4) Experimental results agreed well with numerical predictions. Thus the reliability of the numerical method used in the previous paper was confirmed.

No abstract