Weird behavior reading acceleration files
I am writing to ask about a weird behavior that I found yesterday using the special accinputs. I am using DualSPHysics to simulate the fuel in a tank under a given profile of acceleration (automotive application). I am passing to the code a csv file for the accelerations.
Comparing the solution with a previous result obtained with a VOF method, I figured out that, for the first seconds the two codes give quite similar results, but after a while the two solutions become very different. In particular, the fluid simulated with DualSPHysics seems to feel a "wrong" acceleration (to give you an idea...at some point, the car has a long turn and I have almost only -60m/s**2 in y and the fluid is all located in -x).
Thinking about the possible source of this problem, I thought that one of the possible reason could be in a wrong reading of the csv file that contain the accelerations. So, to check that, yesterday I sorted the csv file in order to have the acceleration values every 0.05s and run a simulation again (the original csv file has values extracted every 0.005s from a true car lap). The results look slightly different from the one obtained using the original csv file.
Actually, I was expecting small changes because of the different interpolations that probably you get when you interpolate the csv values, but not so visible and not after few iterations.
Have you ever faced problem like this one?
Any suggestions is appreciated;)