[zahng_yi]

hello everyone

I want to add this term to stress equation. Totally explict expression may lead to divergence. Thus some implicit expression may needed. How should I write the FvVectorMatrix by fvm or fvc ?

The equation is written as Latex form:

\begin{bmatrix}b\frac{\partial U_{x}}{\partial y}+c\frac{\partial U_{x}}{\partial z}
\\ z\frac{\partial U_{y}}{\partial z}+a\frac{\partial U_{y}}{\partial x}
\\ a\frac{\partial U_{z}}{\partial x}+b\frac{\partial U_{z}}{\partial y}
\end{bmatrix}