ord_gradient

Define the approximation order for gradient approximation using the MESHFREE least-squares differential operators. The order will be reduced or increased automatically if deemed necessary. The differential operators are introduced in DOCUMATH_DifferentialOperators.pdf, see especially section 2.2 for statements about the approximation order. Default: ord_gradient = 3 Note: This parameter can also be set chamberwise for multiphase simulations (see also KindOfProblem, CHAMBER). If it is not set for specific chambers, it is automatically set according to the non-chamberwise definition for all chambers. Special feature: In this case, the gradient operator is not computed directly, but retrieved from the Laplace operator in the following sense: \( c^x_{ij} = \frac{1}{2}c^{\Delta}_{ij} \cdot ( x_j - x_i )\) \( c^y_{ij} = \frac{1}{2}c^{\Delta}_{ij} \cdot ( y_j - y_i )\) \( c^z_{ij} = \frac{1}{2}c^{\Delta}_{ij} \cdot ( z_j - z_i )\)