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How to mesh gear with hexahedral elements

Hello, Community

i want to mesh this gear with hexahedral element but it seems most hexahedrons have exceeded the skew angle.

i make 2d mesh for the side surface on the small side and some gear surfaces first and use solid map to drag the elements to the side surface on the big side, but the quality is too bad.

Does anybody have a new idea to mesh the gear with hexahedron? The model is in attachment. Thanks a lot.

1_mesh1.PNG

gear.hm

mesh1.PNG

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Chayan

The easiest approach I have seen folks use is to split the geometry into the inner cylinder and the outer helix/gear. Mesh each part individually, and then use a tied contact to connect the two back together. This would give you a pure hexahedral mesh.

If all types of elements are acceptable, another option is to mesh the outside with Hexas, and as you come inwards, transition into pyramids and tetra elements.

As regards a single hexahedral (only) mesh on a gear structure as shown, Im not sure if it is geometrically feasible.

stephen93

The easiest approach I have seen folks use is to split the geometry into the inner cylinder and the outer helix/gear. Mesh each part individually, and then use a tied contact to connect the two back together. This would give you a pure hexahedral mesh.

If all types of elements are acceptable, another option is to mesh the outside with Hexas, and as you come inwards, transition into pyramids and tetra elements.

As regards a single hexahedral (only) mesh on a gear structure as shown, Im not sure if it is geometrically feasible.

thanks for your advice