Multiple wave pistons

[aepoc]

Hey there, I am trying to run a simulation with 4 pistons moving in the z direction. I would like for 2 of them to produce a wave at t=0s and the other two to produce a wave at t=1/2*wave period. Unfortunately when using the automatic wave generators, it looks as though no other motion can be defined. Is there a way to achieve this? the simulation runs successfully only when all 4 pistons are set to the same wave.

The two wave programs I created are the same other than the phases. 2 pistons are set to phase 0 and 2 pistons are set to phase pi/2 radians. Is there different way to add a delay to only 2 pistons?

[aepoc]

Seems to be working as I intend now. I'm not exactly sure what I did correct... perhaps it was putting the plungers below the bound geometry in object order?

I have a question about the Phase input for the plunger style wave generators:
DesignSPHysics states that the units are in radians but the .xml says that the phase is a function of Pi in radians... If i were trying to start at a phase of 90 degrees (pi/2 radians), would the correct input be 1.570795 radians or would it be .5? (0.5*pi = 1.570795rad).

I'm hoping that the code will multiply by pi (input = 0.5) as typing the long decimals is less accurate.

Thanks in advance!

[aepoc]

I would just like to note that changing the start time of the paddles in the casedef.xml was much easier than changing the starting phase in designsphysics

[luzpaz]

@aepoc any chance you can upload the example model that you mentioned in this ticket ?

[aepoc]

I'll look for this specific code on Monday. If I cannot find this specific simulation, would you like the XML from a similar simulation? Whenever I have multiple plungers out of phase, I just change the start time. It would be nice to input by phase.

Thanks

[luzpaz]

Maybe just worth uploading to this ticket for posterity as well.