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wave overtopping at quay walls

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Old   November 17, 2014, 09:57
Default wave overtopping at quay walls
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Oliver Meyer
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Hello Everybody,

I am starting this thread as a continuous log of my improvement and as a log of the progress. My aim is to simulate waves overtopping a quay structure. The final result should be a overtopping rate at defined wave length and heights as I found out in my diploma thesis here in Germany.
I examined the overtopping of waves in a wave flume for a given structure. The waves were created with a (flap type) paddle for high waters.

I'm a totally beginner at Ansys Fluent, therefore I'm grateful for any given advice.

Let's do it!
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Old   December 18, 2014, 05:17
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Oliver Meyer
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Hi all,

after scaling and transforming the AutoCAD data I exported the data as *.sat data and imported the model into CFX-Pre. There are many volumes. First there was a problem as I imported areas and some of them had the same normal vector. I changed the areas in AutoCAD so that they are feaces of volumes.

I attached the domain. It has a quay structure with underlying suporting ferroconcrete grid.

The width of the model is 7,3 m - the length is 209,9 m.
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File Type: jpg 14-12-18_cfx_pre.jpg (20.9 KB, 9 views)
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Old   December 18, 2014, 05:26
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The grid is automatically created by ansys. It is calculated for the following physics:

CFD, CFX

min. size of an element 50 mm
max. size of an element 500 mm

I refined the front of the quay structure. (refinement with factor 2)

14-12-18_mesh.JPG

14-12-18_mesh2.jpg

14-12-18_mesh_refinement.JPG
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Old   December 18, 2014, 05:38
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I have a lot of connections. I think this stands for two or more planes at the same position.

May this lead to a problem? If so, how can I reduce the count of them?

14-12-18_connect.JPG

14-12-18_connect2.jpg

Would it be better to join the single bodies to one volume in AutoCAD?
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Old   January 4, 2015, 05:38
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Oliver Meyer
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Does anybody know how to set boundaries for oceanic waves?
Is CFX or FLUENT better for the simulation? I started in CFX but know it tends to be better with Ansys Fluent. It seems not to be as comfortable as CFX.
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