When I used the STL model, there was a particle leak
For example, in the pipe in the figure, I added an inlet and an outlet. Particles will leak from the boundary when flowing. Is there any way to solve it
For example, in the pipe in the figure, I added an inlet and an outlet. Particles will leak from the boundary when flowing. Is there any way to solve it
Comments
Play around with position of inlet
Make its diameter smaller than the inlet tube
Add a damping zone around the inlet
In general, fixed flow cases in pipes are better to do in Finite Volume based methods than SPH. Remember that DualSPHysics does not have any wall functions, which means that you need an extremely high resolution to resolve the boundary layer flow.
If you are not using mDBC, you are also doing it sub-optimally, DBC will never be able to properly catch the boundary layer effects.
Also remember that a full no-slip condition is not applied in DualSPHysics yet. Hopefully comes with the additional features to mDBC.
Kind regards
@Asalih3d Thank you for your answer. I use "modefill" to build a single-layer bufferzone. How to add a damping layer?Is there any good way to use MDBC？
@Asalih3d Can mDBC be applied to the external stl/vtk boundary model?
No, not easily in this version of the code unfortunately.
You can perhaps hack your own solution if you understand the "Normals.bi4" (forgot exact name) file and can then do as you want.
Kind regards