OGS
[tag] epsilons

Perturbations of the variable components used for evaluating finite differences (excluding deformation).

Note
The perturbations must be specified component-wise for each non-deformation variable. If the number of perturbations is not equal to the number of non-deformation variable components, a fatal error is issued. The deformation block of the local Jacobian matrix is calculated analytically; therefore, perturbations for deformation components are not required.

Additional info

From ProcessLib/CreateForwardDifferencesJacobianAssembler.cpp line 51

  • This is a required parameter.
  • Data type: std::vector<double>
  • Expanded tag path: processes.process.jacobian_assembler.ForwardDifferences.epsilons
  • Go to source code: → ogs/ogs/6.5.7

Used in the following test data files