Abstract
A new visualization technique is introduced to know the shape of liquid surface. This method, which we named 'K-Moire method' is excellent in the point that it is possible to see very small disturbances of the surface with high resolution compared with ordinary grid lighting Moire method.
In this paper detailed technique for the visualization is explained. The grid used here is made of nylon string 0.23mm in diameter which is arranged with 0.5mm pitch using screw notch.
The lines in the pattern observed is not defined as contour lines, but the pattern could be reproduced by digital plotter after numerical analysis.
Experimental examples are presented for simple surface shapes, which are paraboloid of revolution and combined vortex. For both cases the computer plots are shown together, and they agreed with experimental results pretty well.
