Electric displacement law

This relationship describes part of the physical problem being optimized:

\mathbf D=\mathsf e:\boldsymbol{\varepsilon}+\boldsymbol{\epsilon}^{S}\mathbf E,\qquad\mathbf E=-\nabla V

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.