Displacement Field Condition¶
The displacement field condition sets a specific value of the electric displacement field \(\mathbf{D}=\varepsilon\mathbf{E}\) at the selected boundary:
\[
\left. \mathbf{D} \right|_{\partial\Omega}
= \mathbf{D}_0 \cdot \hat{\mathbf{n}},
\]
where \(\partial\Omega\) is the given boundary with the unit normal \(\hat{\mathbf{n}}\) and \(\mathbf{D}_0\) is the desired value of the displacement field.