Abstract
One of the authors Arai has occationally reported on the usefulness of the application of the gel birefringence method to the stress analysis of the flowing liquid. But isochromatic and isoclinic lines clearly showed remarkable change not only with the included angle of the wall but also with the direction of load. Any theoretical background for these observations has never been clarified. In the present paper, a theoretical derivation of the lines were performed by applying Moffatt's (1964) streaming function to the standpoint adopted by Philippoff (1976) on the birefringence analysis on Newtonian liquid. Herein calculated values were compared with practically observed ones obtained by gel birefringence method using 15 wt.% gelatin jelly.
