Translations:FEM SolverElmer SolverSettings/18/en

This system has the following properties:
 * : Polynomial degree for the iterative solver method BiCGStabl . This has only an effect if is Iterative and  is BiCGStabl. Starting with the default of 2 is recommended.
 * : Parameter for the iterative solver method Idrs . This has only an effect if is Iterative and  is Idrs. Starting with the default of 2 is recommended. Setting the parameter to 3 might increase the solving speed a bit. For flow analyses the Idrs method is up to 30 % faster than the default BiCGStab method.
 * : Method used for direct solving. This has only an effect if is Direct. The possible methods are Banded, MUMPS and Umpfpack. Note that MUMPS usually needs to be installed before you can use it. Note: when you use more than one CPU core for the solver  only MUMPS can be used. MUMPS has to be installed manually to Elmer. It is only available as download per request via email.
 * : Maximal number of iterations for an iterative solver run. This has only an effect if is Iterative.
 * : Method used for iterative solving. This has only an effect if is Iterative.
 * : Method used for the preconditioning. For info about preconditioning, see this presentation (page 8) from Elmer.
 * : If the solving is done Direct or Iterative.
 * : Disables the linear solver. Only use this for special cases. It can be used to disable temporarily an equation since its solving is then not performed. There are, however cases there the solver is send to an infinite loop instead.
 * : The tolerance for the solver to stop. If the error is smaller than the tolerance, the solver run will be is finished. Otherwise the full number of will be performed. In the Elmer solver log you see how the error is minimized while the solver is running. (Look in the log at the end off every solver iteration for the value behind Relative Change). In case it does not go down below a certain value but reaches a value above the current tolerance that is acceptable for you, you can increase the tolerance.