OGS
[tag] lambda

Tikhonov lambda value that is added to the diagonal of the Jacobian matrix. Should be small and positive (typically in the range of 1e-20 to 1e-10).

A larger value provides stronger regularisation but may affect the accuracy of the solution. A smaller value provides weaker regularisation but may not be sufficient to improve convergence.

Example:**

<lambda>1e-14</lambda>

Additional info

From NumLib/ODESolver/CreateNonlinearSolver.cpp line 121

  • This is a required parameter.
  • Data type: double
  • Expanded tag path: nonlinear_solvers.nonlinear_solver.tikhonov.lambda
  • Go to source code: → ogs/ogs/6.5.9

Used in the following test data files