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Gauss law
Understand the `Gauss law` governing equation when choosing an objective optimization for Piezoelectricity.
This relationship describes part of the physical problem being optimized:
\nabla\!\cdot\mathbf D=\rho_q
Check the variables, signs and units against your intended model. The objective and constraints must use quantities available in the selected study; this equation page does not create a separate editable model feature.