Wave Maker (Piston) - Experimental Vs DualSPHysics

Vijay

April 2023 edited April 2023 in DualSPHysics v5.0

Dear All,

I am trying to validate wave flume data with DualSPHysics simulations. But having one query regarding position and motion of piston.

In the experiment, it is given that the distance between wave maker origin and wave gauge is 9.15 m.

In DualSPHysics, I used the following settings -

<!-- Piston -->			
<setdrawmode mode="full" />
<setmkbound mk="10" />
<drawbox>
    <boxfill>solid</boxfill>
    <point x="3" y="1.0" z="0.0" />    <!-- Piston at 3 m -->	
    <size x="0.05" y="4.0" z="4.0" />
</drawbox>

While calculating wave height, I then kept the gauge at 9.15 + 3 = 12.15m

But this is giving me some shift in wave arrival time as shown in figure below. (Red is SPH, Blue is experimental)

I suppose this could be because piston at x = 3 is not necessary the wave maker origin. Am I correct?

Can anyone please help me on how I can proceed?

Is there any way to calculate the coordinates of piston movement or stroke so that we can adjust the piston initial location accordingly?

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