Journal article
High-fidelity CFD simulation of wave run-up for single/multiple surface-piercing cylinders in regular head waves
Applied ocean research, Vol.59, pp.687-708
09/2016
DOI: 10.1016/j.apor.2015.08.008
Abstract
The capabilities of CFDShip-Iowa V4.5 and V6.2 simulations for wave run-up for single/multiple surface-piercing cylinders in regular waves are assessed in conjunction with the ITTC OEC Workshop on VIV and Wave Run-up held in Nantes, France October 17⿿18, 2013. Statistical convergence and grid/domain/turbulence model sensitivity studies show uncertainty UI values are less than 1% for both the experiment/simulation data and grid/domain/turbulence model sensitivities are less than the facility bias UFB. Simulations are qualitatively validated using UFB and error E between experiment and simulation. Errors for single/four cylinder(s) are comparable with UFB and average error E¯ for the other CFD data of the workshop participants. Results from both V4.5 and V6.2 agree well with experiment and also show capabilities to apply for complex/large-scale problem and to describe detailed wave breaking/spraying for V4.5 and V6.2, respectively. Study on run-up profile shows mean wave elevations are similar to free surface elevations for a cylinder in a steady current. For wave steepness/wave length effect, 2nd to 1st harmonic ratio on the cylinder weather face decreases with steepness for short wave, but increases for long wave. Wave diffraction analysis shows that 2nd/3rd to 1st harmonic ratio in diffracted wave contour reach up to 18⿿41%/9⿿16% respectively. Due to interaction between cylinders, crest/trough heights increase 5⿿17%/4⿿10% for 4C, respectively. Study on vortex shedding shows short wave has insufficient time to develop periodic vortex shedding compared to long wave.
Details
- Title: Subtitle
- High-fidelity CFD simulation of wave run-up for single/multiple surface-piercing cylinders in regular head waves
- Creators
- Sung-Hwan YoonDong-Hwan KimHamid Sadat-HosseiniJianming Yang - University of IowaFrederick Stern - University of Iowa
- Resource Type
- Journal article
- Publication Details
- Applied ocean research, Vol.59, pp.687-708
- Publisher
- Elsevier Ltd
- DOI
- 10.1016/j.apor.2015.08.008
- ISSN
- 0141-1187
- eISSN
- 1879-1549
- Grant note
- DOI: 10.13039/100000006, name: Office of Naval Research, award: N000141-01-00-1-7
- Language
- English
- Date published
- 09/2016
- Academic Unit
- Mechanical Engineering; IIHR--Hydroscience and Engineering
- Record Identifier
- 9984196652502771
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