Wavemaking Resistance of Ships with Transom Stern 



the smooth boundary and that the representation by source gives 

 the discontinuous boundary. To elaborate a little more, the discussers 

 did not notice that the boundary ahead of the location of sink or at 

 X < 0, z = is no longer a free surface but has beconne a part of 

 body boundary formed by the sink flow field, where the pressure is 

 a constant different from zero. This may be understood better if we 

 consider another identity of potentials due to a point sink on x = 0, 

 z = and a uniform distribution of doublet in - x direction on 

 -oo<x<0, z=0. The body boundary created by the two-dimensional 

 sink is considered to form a part of a transom stern heuteristically 

 in the second section to justify the three-dimensional mathematical 

 model in the following sections. It will be easily noticed with a real 

 scale how readily acceptable the boundary would be and how proper 

 and simple this model is. 



Here the author also appreciates being advised that the factor 

 of 2 is missing on M In his equations in the second section of the 

 author's paper. This factor has nothing to do with any of the numeri- 

 cal results. In fact, the second section has no numerical relation 

 with the results derived In other sections. 



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