Numerical and experimental research was performed on two-dimensional Rankine oval-wall hydrodynamic interactions using a simplified algorithm based on surface source and middle camber vortex distribution.

Compared with the case of single isolated cylinder, hydrodynamic interference phenomena, such as wave resonance etc, of the diffraction problem due to multiple cylinders are identified, which is important to the design of moorings and other facilities involving multiple structures.

The results show that the present method can satisfactorily predict the motion response characteristic for high-speed displacement catamarans, but the strip theory cannot give rational result, because hydrodynamic interference phenomena would happen at some discrete frequencies when applying the strip theory to the calculation of hydrodynamic coefficients of multiple cylinders.

To improve the precision of the system,high sampling and processing speed is needed. So the sonar array attitude stabilization system is real-time and must respond quikly .

In order to verify the present3D method,two circular cylinders ' interactions in finite depth of water were considered and results ob-tained with our code were compared with published results.

The effect of system polydispersity and the magnetodipole and hydrodynamic interactions between particles on the macroscopic and dynamic properties of ferrofluids was estimated.

We also estimate how the magnetodipole and hydrodynamic interactions of the particles influence the effective dynamic properties of the ferrocolloid.

The tendency of the screening of hydrodynamic interactions is demonstrated on the concentration dependence of the bead mean-square displacement and the DSF.

We study the lattice dynamics of colloidal crystals on the assumption that the potential interactions are limited to nearest neighbors and next nearest neighbors and that the long range hydrodynamic interactions may be treated in point approximation.

The dynamic scattering factorS(k,t) for simple ring polymers and linear chains in the presence of hydrodynamic interactions is calculated toO(ε) (ε≡4-d, d being the spatial dimensionality) and toO(k4) (k being the external momentum).

The combined influence of hard sphere or electrostatic potential and solvent-mediated hydrodynamic interaction on the short-time dynamics of monodisperse suspensions is investigated in detail.

Hydrodynamic Interaction of Two Evaporating Droplets

Of the greatest interest is the sharp slowing of the approach due to the hydrodynamic interaction of the drops, considerably sharper than in the case of molecular diffusion [2].

The obtained macroscopic equations of the pseudogas are more general than the ones proposed earlier by Myasnikov, this being due to the anisotropy of the time constants which occur in the operator of the hydrodynamic interaction.

The layer has an inhomogeneous vertical distribution of the dispersed phase and a small volume concentration of the particles, the hydrodynamic interaction between which occurs solely through the carrier phase.

In this paper, the second order steady drift force on ships and floating off- shore structures are calculated by far field method. The amplitudes of radiation and diffraction at infinitive are obtained by source distribution method. For twin hulls, the interaction between the two hulls is taken into account. The drift forces on cross section of Lewis type and semisubmersibles are computed by the authors and agree fairly well with experimental results.

Based on the results of oblique towing tests of five models and rotating arm tests of one model, the hydrodynamic interaction between hull, propeller and rudder of high speed twin-screw,twin rudder ships with transom stern is obtained. By analyzing the relation of interaction coefficients with the drift angles, yawing velocities and ship principal dimensions, the formulas for calculating the hydrodynamic interaction of the ship are established.

This paper presents an investigation of the hydrodynamic forces and the dynamic responses induced bydivergent radiated and scattering waves between a set of large sized circular cylinders and the fluid surrounding them and the soil into which the cylinders inserted. A mathematical model for the prediction of the hydrodynamic forces and the dynamic responses has been proposed by the authors such that not only the interaction between the structure and the fiuid, but also the hydrodynamic interferences one to another...

This paper presents an investigation of the hydrodynamic forces and the dynamic responses induced bydivergent radiated and scattering waves between a set of large sized circular cylinders and the fluid surrounding them and the soil into which the cylinders inserted. A mathematical model for the prediction of the hydrodynamic forces and the dynamic responses has been proposed by the authors such that not only the interaction between the structure and the fiuid, but also the hydrodynamic interferences one to another between the cylinders and the interactions with the soil deposit for the case of horizontal sea-floor ground motion.The influences due to these aformentioned interactions in the structure-fluid-soil system on the determination of wave loading are analyzed one by one separately. The complex frequency function of the system is derived semianalytically. This solution procedure can be conveniently extended to a stochastic analysis in the frequency domain of the dynamic response of these types of offshore structures.The conclusions reached indicate that the wave loading on the structure due to interaction is affected distinctly near the water surface and around the excitation frequency of earthquake (and wave )when it is coincident with any of the nature frequencies of the system.