VORTEX FORCE ANALYSIS OF WAVE-DRIVEN NEARSHORE CIRCULATION

  • Morteza Derakhti
  • Robert A. Dalrymple

Abstract

In this presentation, we examine 3-D structure of nearshore circulation driven by short-crested wave breaking using the 3-D Smooth Particle Hydrodynamic model, GPUSPH (Hérault et al., 2010). The alongshore variation of incident wave field has been imposed by using the method of intersecting wave trains proposed by Dalrymple (1975). We use the 3-D vortex force formalism to analyze the various forcing mechanisms of the observed circulation. Of particular interest is the relative importance of the vortex force compared with the other wave-averaged forces. The accuracy of the depth-averaged vortex force based on the formulation of Smith [2006] is also examined.

References

Craik, Leibovich (1976), A rational model for Langmuir circulations, J. Fluid Mechanics, 73, 401-426.

Hérault, Bilotta, Dalrymple (2010), SPH on GPU with CUDA, J. Hydraulic Research, 48, 74-79.

Longuet-Higgins, Stewart (1964), Radiation stresses in water waves; physical discussion, with applications, in Deep Sea Res., vol. 11, pp. 529-562, Elsevier.

Smith (2006), Wave-current interactions in finite depth, J. Phys. Oceanogr., 36(7), 1403-1419.

Wei, Dalrymple, Xu, Garnier, Derakhti (2017), Shortcrested waves in the surf zone, J. Geophys. Res., 122, 4143-4162.

Published
2018-12-30
How to Cite
Derakhti, M., & Dalrymple, R. A. (2018). VORTEX FORCE ANALYSIS OF WAVE-DRIVEN NEARSHORE CIRCULATION. Coastal Engineering Proceedings, 1(36), currents.61. https://doi.org/10.9753/icce.v36.currents.61