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 language | English |
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| Title of host publication | Proceedings of the Third (1993) International Offshore and Polar Engineering Conference |
| Publisher | Publ by Int Soc of Offshore and Polar Engineerns (ISOPE) |
| Pages | 136-142 |
| Number of pages | 7 |
| ISBN (Print) | 1880653087 |
| Publication status | Published - 1993 |
| Event | Proceedings of the Third (1993) International Offshore and Polar Engineering Conference, Part 3 (of 4) - Singapore, Singapore Duration: Jun 6 1993 → Jun 11 1993 |
Other
| Other | Proceedings of the Third (1993) International Offshore and Polar Engineering Conference, Part 3 (of 4) |
|---|---|
| City | Singapore, Singapore |
| Period | 6/6/93 → 6/11/93 |
All Science Journal Classification (ASJC) codes
- Engineering(all)