ToolsProcessingNumericsSchemesGauss TheoremGauss Theorem∫V(∇ ∙ u)dV=∮S(n ∙ u)dS \int_V \left( \div \u \right) dV = \oint_S \left( \vec{n} \dprod \u \right) dS∫V(∇∙u)dV=∮S(n∙u)dS