Mesh distribution and piezoelectric device antisymmetry Function

Hi guy,

May I know the function of mesh -> Free tetrahadral -> distribution? If I applied a compression force on an object surface, is it function to determine the distribution of the applied force?

I have no ideal of the antisymmetry function under piezoelectric device physic? May I know how to use the antisymmetry function?

Hope someone willing to help and answer my question, thank you~