Scattering of a surface wave by a submerged sphere

✍ Scribed by E. P. Gray

• Publisher: Springer
• Year: 1978
• Tongue: English
• Weight: 946 KB
• Volume: 12
• Category: Article
• ISSN: 0022-0833
• DOI: 10.1007/bf00042802

✦ Synopsis

The problem of the scattering of a surface wave in a nonviscous, incompressible fluid of infinite depth by a fully submerged, rigid, stationary sphere has been reduced to the solution of an infinite set of linear algebraic equations for the expansion coefficients in spherical harmonics of the velocity potential. These equations are easily solved numerically, so long as the sphere is not too close to the surface. The approach has been to formulate the problem as an integral equation, expand the Green's function, the velocity potential of the incident wave, and the total velocity potential in spherical harmonics, impose the boundary condition at the surface of the sphere, and carry out the integrations. The scattering cross section has been evaluated numerically and is shown to peak for values of the product of radius and wave number somewhat less than unity. Also, the Born approximation to the cross section is obtained in closed form.