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I am having trouble meshing this soil pile interaction. I need to model the soil and pile as solid brick elements. However, when I try and mesh the Soil and Pile as Solid -> Structured -> Hex -> Linear, the mesh comes out very strangely.

Please see photos and scd file attached

How I can fix this so that the whole model is modelled with solid brick elements?

Many thanks in advance.

You have to make sure that all solids geometries are eligible for hexa meshing: they must have 6 faces, each face must have 4 sides.