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Hi,there.

While combining a mesh with smaller edge length to another mesh, a problem occured. It can be seen in the Fig.1 that some useless elements were generated around the corner of the outline(black line). How could this problem be solved and avoided?

Besides, I'm confused of the "density" part (2.2.3.1.1 Controlling Element Size by Defining Density Regions).It seems that the density object has no effects on mesh refinement.

Moreover, how can the mesh be generated as showed in Fig.2 ?When I tried to do this, the part outside the outline was still included.

Look forward to reply.

Best wishes
Hong