SYMBOLS AND DEFINITIONS— Continued 



T wave period 



t obstacle cross-sectional tMckness normal to wave direction 



U horizontal fluid speed at wave crest 



u characteristic flow speed 



W crest height above SWL ^ 



W(a) peak water above SWL at angle a on circular pile circum- 

 ference 



W(a) time-averaged quantity of peak water above SWL at angle a 

 on circular pile circumference 



W(B) peak water above SWL at pile yaw angle g 



X maximum pile cross-sectional dimension 



Z = a/b flow constriction parameter 



a angle specifying point on circular pile circumference 



B yaw angle of noncircular pile 



B" average over yaw angles identical according to symmetry 



Y angle specifying front symmetry point of pattern 

 6 angle describing geometry of pile channel 



V kinematic fluid viscosity 



ir the transcendental number 3.14 .. . ^ 



p fluid density 



(j) angle locating pattern minimum 



X angle measuring half-width of pattern's front maximum 



Tfe orientation angle in wave basin tests 



