Abstract
The quantitative agreement of our results(1981) on the isochromatic and isoclinic trajectories obtained by gel birefringence method with the theoreticcal values computed after the standpoint of Philippoff(1976) on the possible operation of the deviatoric normal stresses in the Newtonial liquid flow, suggested a need of further experimental evidence of the effect of the local displacement vector in jelly on the birefringence response. The present paper is concerned with this view-point, where the measurements on the tracer carbon particles and on the deformation models of the binary mixture particles of poly(dimethyl siloxane) and monochlorobenzene were carried out for their dispersed systems in 15 wt.% gelatin jelly solidified in geometrically similar ducts to those used by Durelli and Norgard (1972). Observed data, when compared with those reported by Durelli on liquid flow, showed a good coincidence of the tracer displacement loci with streamlines along with thier linear proportionality of the displacement vector to the liquid velocity. On the other hand, each initial spherical droplet of dispersion deformed by a certain degree of variation into ellipsoid with its longer axis rigorously inclined to the local direction of extensional principal stress of the matrix by the same angle as the extinction one.
