Study on random wave force coefficients using numerical simulation of flow field

Changhong Hu, Wataru Koterayama

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

A new approach to investigate the hydrodynamic forces acting on a vertical cylinder in random waves is presented. The time series of random wave force is obtained from numerical simulation of a two-dimensional irregular oscillating flow around a circular cylinder by numerical solution of the incompressible Navier-Stokes equation expressed in a generalized coordinate system through the use of MAC method. The random waves are chosen from laboratory experimental data. To obtain the Morrison force coefficients, two methods are used: least squares fit of total force time series and least squares fit on a wave-by-wave basis. The phenomena found in calculated results are similar to those in the experiments, and the study revealed that the so-called history effect of random wave forces is mainly due to the vortex shedding, which is confirmed by computed flow patterns.

Original languageEnglish
Title of host publicationProceedings of the Third (1993) International Offshore and Polar Engineering Conference
PublisherPubl by Int Soc of Offshore and Polar Engineerns (ISOPE)
Pages136-142
Number of pages7
ISBN (Print)1880653087
Publication statusPublished - 1993
EventProceedings of the Third (1993) International Offshore and Polar Engineering Conference, Part 3 (of 4) - Singapore, Singapore
Duration: Jun 6 1993Jun 11 1993

Other

OtherProceedings of the Third (1993) International Offshore and Polar Engineering Conference, Part 3 (of 4)
CitySingapore, Singapore
Period6/6/936/11/93

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All Science Journal Classification (ASJC) codes

  • Engineering(all)

Cite this

Hu, C., & Koterayama, W. (1993). Study on random wave force coefficients using numerical simulation of flow field. In Proceedings of the Third (1993) International Offshore and Polar Engineering Conference (pp. 136-142). Publ by Int Soc of Offshore and Polar Engineerns (ISOPE).