FRONTIER PROBLEMS 
Thursday, August 24, 1972 
Morning Session 
Chairman : Pr.).J.V.-Weéhausen 
University of California, Berkeley, U.S.A. 
Page 
Optimum Shape of Bodies in Free Surface Flows. i 
T. Y. Wu (California Institute of Technology). 
A. Whitney (Lockheed Aircraft Corporation, 
Research Laboratory, (U.S.A.). 
Hydrodynamic Cavitation and Some Considerations of 
the Influence of Free Gas Content. 1131 
F.B. Peterson (Naval Ship Research and De- 
velopment Center, U.S.A.). 
Vortex Theory for Bodies Moving in Water. 1187 
R. Brard (Bassin d'Essais des Carénes, 
France). 
On the Validity of a General Similarity Hypothesis 1285 
for Jet and Wake Flows. 
L. Fink, E. Naudascher (Universitat 
Karlsruhe, Fed. Rep. Germany). 
Velocity Distribution and Friction Factors in Flows 
with Drag Reduction. 1305 
M. Poreh, Y. Dimant (Technion Israel 
Institute of Technology. 
1109 
