SYMBOLS AND DEFINITIONS 



a circular pile radius 



B beat length between first and second wave harmonics 



b half-width of wave tank 



Cp empirical drag coefficient 



D draft of a surface-piercing obstacle 



d Stillwater depth 



E eccentric setting on wavemaker drive wheel 



F = U^/g£ Froude number 



^a ~ 'J^/^ga Froude number based on circular pile diameter 



F^ = u^/gD Froude number based on obstacle draft 



F^ = U^/gt Froude number based on obstacle thickness 



f^ drag force per unit pile length 



G distance from wavemaker to measurement point 



g acceleration due to gravity 



H wave height 



h horizontal semiaxis of water particle orbit 



j integer index 



k = 2i7/L wave number 



L wavelength 



I characteristic flow length 



Q trough depth below Stillwater level (SWL) 



R = U£/v Reynolds number 



S = HL^/Pd^ Stokes parameter 



SCa) symmetric series curve fit to peak water data 



