... performance of offshore renewables. It aims to contribute to the practice of numerical simulations for ocean energy converters. renewable energy sea state velocity potential upstream oil & gas environmental condition domain analysis frequency mean wind speed offshore renewable irregular...

... otc 6888 equation upstream oil & gas seaquake earthquake zone consideration hull seawater reservoir characterization earthquake wave propagated frequency boundary condition wave equation safety consideration velocity potential compressional wave earthquake tlp sea surface...

... direction A wavelength of incident wave nI , nO inner, outer fluid domains W wave frequency We encounter wave frequency <PI,<PD incident, diffraction wave velocity potential <i} ,<pk first order radiation velocity potentials INTRODUCTION Previously (1,2,3)* the surge related low frequency or wave drift...

... waterplane circular cylinder forward speed cylindrical platform platform vertical circular cylinder oscillatory motion velocity potential heave waterline boundary condition conical platform drift force OTe 5033 Arctic Mobile Drilling Structures in Waves by S.T. Kalske, T.O. Karppinen, and J.E...

...) for a body of general shape. subsea system wave group proceedings drift force irregular wave natural frequency velocity potential vertical cylinder chakrabarti steady drift force natural period nonlinear frequency viscous drift force equation cylinder upstream oil &amp; gas drift...

... horizontal motions in moored structures. model test irregular wave subsea system cylinder quadratic transfer function head wave wave force wave drift force computation beam wave equation velocity potential upstream oil &amp; gas vertical drift force transfer function frequency drift...

... by a time stepping procedure, in which the velocity potential of the flow at anyone instant is obtained by an integral equation method based on Green's theorem. Comparison with known diffraction solutions can be made only for relatively restricted situations. A few such comparisons have been carried out...

... numerical model wave flume wave train extreme wave wave generator upstream oil &amp; gas particle velocity experiment velocity potential flume basic wave deep water breaker ship disturbance superposition surface elevation numerical simulation equation stoke wave...

...-line piezometer described here is lowered through the drill pipe and inserted into the sediment below the bit. The pore water pressures sensed by the piezometer are transmitted to recording devices on the vessel via the wireline. velocity potential piezometer test flow in porous media...

... wavelength otc 3627 triton regular wave wetted surface asymptotic expansion numerical result formulation approximation equation upstream oil &amp; gas wave drift force domputation agreement pinkster derivation expression velocity potential tanker subsea system drift force...

... surge force order wave servo unit order approximation dynamic positioning order force contribution low frequency part upstream oil &amp; gas irregular wave relative wave height wave height frequency component control signal velocity potential iiave feed-forviard frequency total...

... is formulated in terms of linear potential. flow theory in steady state condition. The total velocity potential is written as: ~(x,y,z;t) = Re(<p(x,y,z) e-iwt)(S) This velocity potential is conveniently broken down into the following parts: 6 . <I> = <p +<1> 7+ In.· <I> ( 6 ) o j=l] J Here <p e -iwt...

... as ~= .atqj = Re[ \7¢j e-J. ]'j=1,2, 6 (2) where j denotes the velocity potential assS- ciat:d w~th :he six ~egrees+o! !reedom pnd V = fa/ax + ja/ay + [a/az,with i,j,k being the unit base vectors. It is first noted that in the case of small amplitude motion the linear superposition of solutions is possible...

.... velocity potential platform wave height equation free surface cylinder coefficient wave force complete structure incident wave denote agreement force measurement velocity-squared term superstructure base unit integration flow field upstream oil &amp; gas horizontal force experimental...

... of a double Fourier series for the velocity potential (extended velocity potential-- EXVP). This series gives the flexibility required for satisfying with good accuracy all of the hydrodynamic equations for qUite complex waves. Practical computing require- ments restrict applications to the cases des cri bed...

... for the velocity potential that must satisfy appropriate boundary conditions for the problem. Once the potential function is ob- tained, the pressure on the immersed surface as well as resulting forces and moments are easily determined. It appears that, while wave interaction with floating objects has been...

... of a velocity potential. The velocity potential which satisfies the basic differen- tial equation and appropriate boundary conditions is sought. Once it is found, the problem is completely solved. The pressure distribution on the surface of the object can be determined and hence the forces on the object can...