For bathtub four planar shape, about the movement of the water in the tank of the conditions provided in the central portion of the water tank obstacle conditions and inflow and outflow basic, evaluated using the Morril index, the index short circuit study pharmacological water through the tank model advancing, the following findings were obtained.
(1) Evaluation of low ordered planar shape tub Morril index was square ( oblique inflow and outflow<rectangle<square<circular).
(2) Experimental conditions Morril index and short index of the lowest basic inflow and outflow conditions is on the surface of the water inflow.
(3) Conditions provided in the center of the vessel to obstacle Morril index is lower than that of (RUN3) base inlet.
