NUMERICAL CALCULATION OF WAVE FORCES ON STRUCTURES

B.D. Nichols, C.W. Hirt

Abstract


A finite-difference technique for solving the Navier-Stokes equations for an incompressible fluid is used to calculate transient wave forces experienced by fixed and moving bodies. The numerical technique is based on the Marker-and-Cell (MAC) method developed by Harlow and Welch (1965). This new technique uses an especially simple solution algorithm that is designed for persons with little or no experience in numerical fluid dynamics. Originally conceived as an instructional tool, it has proven to be an extremely useful and versatile calculational method. Many useful calculations are possible with the publicly available code, SOLA-SURF, which is briefly described in Sec. II; however, the outstanding feature of this numerical scheme is the ease with which it can be modified to handle more complex problems. Reported here, in Sec. Ill, are examples to illustrate the utility of this new calculational tool for investigating the dynamic interactions between ocean waves and coastal structures.

Keywords


numerical calculation; wave forces; forces on structutes

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