G(PfQ) „ i „ I _ I" / sec 6 d8 / ^ °-— du 



r r i * -* o u _ k aec 9 



(10) 



where 



and 



2 / x 2 v 2 x 2 



• - (x - x ) + (y - y ) + (z - z ) 



2 ,2 ,2 . .2 



• - (x - x ) + (y - y ) + (z + z ) 



(11) 

 (12) 



5 - (x - x ) cosO + (y - y ) sln9 (13) 



Only Che real part of Equation (10) is used in later computation. 



The strength of the sources and sinks, a, in Equation (9) can be founa i>y 

 substitution of Equation (9) into Equation (4) to obtain 



1 a 



•fa %z J/ C(P,Q)o(Q)ds(Q) - -Unj 



(14) 



The solution of Equation (14) is only feasible with the help of a nuraerical 

 procedure which will be given later. 



The force acting en the body is expressed as 



p • -j j p n ds 



(15) 



where p is the pressure around the body and is linearized from Bernoulli's 

 equation as 



