https://cirpwiki.info/index.php?title=Wave_Validation_Case_2&feed=atom&action=historyWave Validation Case 2 - Revision history2024-03-28T18:28:23ZRevision history for this page on the wikiMediaWiki 1.39.2https://cirpwiki.info/index.php?title=Wave_Validation_Case_2&diff=4624&oldid=prevRdchlmeb: /* Case 2: Waves breaking on plane beach */2010-11-22T20:30:40Z<p><span dir="auto"><span class="autocomment">Case 2: Waves breaking on plane beach</span></span></p>
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<td colspan="2" style="background-color: #fff; color: #202122; text-align: center;">Revision as of 20:30, 22 November 2010</td>
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<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>===Case 2: Waves breaking on plane beach===</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>===Case 2: Waves breaking on plane beach===</div></td></tr>
<tr><td class="diff-marker" data-marker="−"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>Visser (1991) conducted eight laboratory experiments, labeled as Exp. 1 to Exp. 8, with monochromatic incident waves that broke on a planar beach and generated a longshore current. A large data set of wave, current, and water level was collected for a number of incident wave conditions tested for two beach slopes (1:10 and 1:20) and two different bottom roughnesses. In this report, Visser Exps. 4 to 7 were selected for model validation because these have the same bottom composite slopes and the most complete measurements. The beach had a 1:10 slope for the first seaward 1-m distance, 1:20 slope for the next 5-m distance, and a flat bottom for the next 5.9 m to the wave generator. Exps. 4 through 6 were performed on a concrete bed, where the bottom friction is expected to be small and, therefore, neglected in the wave numerical simulation. For Exp. 7, the 1:20 slope bottom was roughened by a thin layer (0.5-1.0 cm) of gravel grouted on the concrete floor. Table <del style="font-weight: bold; text-decoration: none;">6 </del>presents the incident wave conditions.</div></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>Visser (1991) conducted eight laboratory experiments, labeled as Exp. 1 to Exp. 8, with monochromatic incident waves that broke on a planar beach and generated a longshore current. A large data set of wave, current, and water level was collected for a number of incident wave conditions tested for two beach slopes (1:10 and 1:20) and two different bottom roughnesses. In this report, Visser Exps. 4 to 7 were selected for model validation because these have the same bottom composite slopes and the most complete measurements. The beach had a 1:10 slope for the first seaward 1-m distance, 1:20 slope for the next 5-m distance, and a flat bottom for the next 5.9 m to the wave generator. Exps. 4 through 6 were performed on a concrete bed, where the bottom friction is expected to be small and, therefore, neglected in the wave numerical simulation. For Exp. 7, the 1:20 slope bottom was roughened by a thin layer (0.5-1.0 cm) of gravel grouted on the concrete floor. Table <ins style="font-weight: bold; text-decoration: none;">1 </ins>presents the incident wave conditions.</div></td></tr>
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<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>'''Table 1. Incident wave conditions. '''</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>'''Table 1. Incident wave conditions. '''</div></td></tr>
</table>Rdchlmebhttps://cirpwiki.info/index.php?title=Wave_Validation_Case_2&diff=4623&oldid=prevRdchlmeb: Created page with "===Case 2: Waves breaking on plane beach=== Visser (1991) conducted eight laboratory experiments, labeled as Exp. 1 to Exp. 8, with monochromatic incident waves that broke on a p..."2010-11-22T20:20:43Z<p>Created page with "===Case 2: Waves breaking on plane beach=== Visser (1991) conducted eight laboratory experiments, labeled as Exp. 1 to Exp. 8, with monochromatic incident waves that broke on a p..."</p>
<p><b>New page</b></p><div>===Case 2: Waves breaking on plane beach===<br />
Visser (1991) conducted eight laboratory experiments, labeled as Exp. 1 to Exp. 8, with monochromatic incident waves that broke on a planar beach and generated a longshore current. A large data set of wave, current, and water level was collected for a number of incident wave conditions tested for two beach slopes (1:10 and 1:20) and two different bottom roughnesses. In this report, Visser Exps. 4 to 7 were selected for model validation because these have the same bottom composite slopes and the most complete measurements. The beach had a 1:10 slope for the first seaward 1-m distance, 1:20 slope for the next 5-m distance, and a flat bottom for the next 5.9 m to the wave generator. Exps. 4 through 6 were performed on a concrete bed, where the bottom friction is expected to be small and, therefore, neglected in the wave numerical simulation. For Exp. 7, the 1:20 slope bottom was roughened by a thin layer (0.5-1.0 cm) of gravel grouted on the concrete floor. Table 6 presents the incident wave conditions.<br />
<br />
'''Table 1. Incident wave conditions. '''<br />
<br />
{|border="2" cellspacing="0" cellpadding="4" width="95%" align="center"<br />
|'''Exp.'''<br />
|'''''H'''''<sub>'''''s''</sub> ''''''(cm)'''<sup>'''a'''</sup><br />
|'''''T'''''<sub>'''''p''</sub> ''''''(sec)'''<sup>'''a'''</sup><br />
|'''''f'''''<sub>'''''p''</sub> ''''''(Hz)'''<sup>'''b'''</sup><br />
|<font size = "4">'''<math>\text{ }\!\!\theta\!\!\text{ }</math></font> ''''''(deg)'''<sup>'''c'''</sup><br />
<br />
|-<br />
|4<br />
|7.8<br />
|1.02<br />
|0.98<br />
|15.4<br />
<br />
|-<br />
|5<br />
|7.1<br />
|1.85<br />
|0.54<br />
|15.4<br />
<br />
|-<br />
|6<br />
|6.9<br />
|0.70<br />
|1.43<br />
|15.4<br />
<br />
|-<br />
|7<br />
|7.8<br />
|1.02<br />
|0.98<br />
|15.4<br />
<br />
|-<br />
|colspan = "5"|a. Monochromatic wave. <br>b. ''f''<sub>''p''</sub>=1/''T''<sub>''p''</sub>. <br>c. Wave direction relative to shore-normal. <br />
<br />
|}<br clear="all"><br />
<br />
CMS-Wave was run at the laboratory scale. The model grid consisted of 90 cross-shore and 243 alongshore square cells, each 10 cm × 10 cm, to cover the entire basin in these experiments. The spectral transformation was computed in CMS-Wave on 11 frequency bins (covering the range of +/ &nbsp;0.05 Hz of the incident monochromatic wave frequency at 0.01-Hz increment) and 35 direction bins (covering a half-plane with 5-deg spacing). The incident monochromatic, unidirectional wave spectrum was specified in a single frequency and direction bin at the seaward boundary. The input current and water level fields were interpolated across shore and averaged alongshore from the data. For Exp.&nbsp;7 with the gravel floor, a constant bottom friction coefficient ''c''<sub>''f''</sub> of 0.01 was specified in CMS-Wave and was found to produce good wave estimates.<br />
<br />
Figure 17 shows an example of input current and water level fields to CMS-Wave for the Exp. 4. Figure 18 compares the measured and calculated across shore wave heights for Exp. 4 through 7. The calculated wave height agrees well with the measurements for four different depth-limiting breaking formulas implemented in CMS-Wave.</div>Rdchlmeb