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

Changhong Hu, Wataru Koterayama

研究成果: Chapter in Book/Report/Conference proceedingConference contribution

抄録

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.

本文言語英語
ホスト出版物のタイトルProceedings of the Third (1993) International Offshore and Polar Engineering Conference
出版社Publ by Int Soc of Offshore and Polar Engineerns (ISOPE)
ページ136-142
ページ数7
ISBN(印刷版)1880653087
出版ステータス出版済み - 1993
イベントProceedings of the Third (1993) International Offshore and Polar Engineering Conference, Part 3 (of 4) - Singapore, Singapore
継続期間: 6 6 19936 11 1993

その他

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

All Science Journal Classification (ASJC) codes

  • Engineering(all)

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