How to set the initial density gradient? Plz Help

YIJIE · March 2023

When I am setting the initial parameters, there is an initial density gradient. Can anyone help me explain its meaning and how to set it? My liquid has uniform density, and it has Rhop0, water column, and max water height corresponding to 1, 2, and 3, respectively. The numbers that can be entered here are between 0 and 9. How should I set it?

Alex · March 2023

Initial gradient:

1) Rhop0 will give rhop0 density to all fluid particles

2) Water column, will assigne a hydrostatic density gradient to a column (so starting from free surface)

3) Max. water height will use the maximum height of fluid particles as reference to start applying the hydrostatic density gradient.

Playing with options and plotting density of initial Case_Fluid.vtk in Paraview you will understand this better.

Regards

Asalih3d · April 2023

https://forums.dual.sphysics.org/discussion/comment/5725#Comment_5725

In cases where an object is cutting the water column, the density initialization is incorrect - at times I found that this makes a simulation completely unrunnable since the initial shock wave (if the water is deep enough) - are they any solutions to this natively in DualSPHysics?

Kind regards

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How to set the initial density gradient? Plz Help

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