# Wave elevation vs tank length

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 October 27, 2013, 23:15 Wave elevation vs tank length #1 New Member   chuan yu Join Date: Oct 2013 Posts: 2 Rep Power: 0 Hello. I´m simulating waves.I know how to plot in a chart the wave elevation vs time. but I can't figure out how to plot wave elevation(or wave profile) vs tank length,can anyone help?? thanks

 October 28, 2013, 05:13 #2 Super Moderator   Glenn Horrocks Join Date: Mar 2009 Location: Sydney, Australia Posts: 10,824 Rep Power: 85 Well, what actually is wave profile versus tank length anyway? You are trying to reduce a 3D field to a 1D line, so you have to do the reduction somehow - maybe sampling along a line, averaging across a profile or some other method. So let us know how you plan to do this reduction in dimensions and we will see if we can help you. And please do not duplicate post again in future. I have deleted the duplicate post.

October 28, 2013, 08:44
#3
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chuan yu
Join Date: Oct 2013
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Thank you very much , Glenn.
My simulation is shown in fig.1
I did a plane and use expression"areaInt(WATER.Volume Fraction)@Plane/20[m]" to plot fig.2,and the chart is composed by wave profile vs time.
my question is,is it possible to plot the chart composed by wave profile vs tank length(x)like fig.3 ??
I can't chose "x" in X values when the xy-transient is selected.
If select xy,I can chose "x" in X values but I don't know how to express the Y values
Attached Images
 CFX.jpg (43.3 KB, 15 views) Chart.jpg (44.3 KB, 11 views) ??.JPG (33.7 KB, 14 views)

 October 28, 2013, 17:46 #4 Super Moderator   Glenn Horrocks Join Date: Mar 2009 Location: Sydney, Australia Posts: 10,824 Rep Power: 85 You can do this in CFD-Post using a session file to generate the data points and export them so you can plot them elsewhere. Also, as your waves are just about 2D then you can take the side plane and draw a VF=0.5 contour and that is your wave profile. You might be able to plot that line as an XY plot; or you can export the line and plot it in another package like matlab, excel or whatever you like.

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