Utilities: Difference between revisions
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=== Pre/post-processing === | === Pre/post-processing === | ||
* [[ic.f90]] - '''Pre/Post-processing template'''. | * [[ic.f90]] - '''Pre/Post-processing template'''. | ||
* [[prim2matlab.f90]] - extract data and write in a netcdf format for easy loading into Matlab or VisIt. | |||
* [[describe_state.f90]] - check time/parameters; see also [[main.info]]. | * [[describe_state.f90]] - check time/parameters; see also [[main.info]]. | ||
* [[changeMp.f90]] - change <tt>i_Mp</tt> value in a state file. | * [[changeMp.f90]] - change <tt>i_Mp</tt> value in a state file. | ||
* [[change_Mp_alpha.f90]] - make copies of a state, | * [[change_Mp_alpha.f90]] - make copies of a state, e.g. make a state 3x longer using 3 copies of a travelling wave, or insert 2 copies of an m=4 state in an m=2 domain. | ||
=== Runtime processing === | === Runtime processing === | ||
Revision as of 06:37, 27 September 2017
- Utilities are used to manipulate or analyse data, either during runtime or in the post-processing phase.
- Utilities are kept in utils/.
- Avoid editing the contents of the program/ directory; almost all modifications can be made via a utility, rather than altering the core code.
- Some of the utilities are non-specific to pipe flow, e.g. code for the GMRES algorithm.
Building
To build, in Makefile, set UTIL = utilname (omitting the .f90 extension), then type
> make > make install > make util > mv utilname.out ...
The penultimate command creates utilname.out.
Record of parameters
- main.info is created in the install/ directory at compile time by 'make install'. Keep a copy of this file along side your executables.
Pre/post-processing
- ic.f90 - Pre/Post-processing template.
- prim2matlab.f90 - extract data and write in a netcdf format for easy loading into Matlab or VisIt.
- describe_state.f90 - check time/parameters; see also main.info.
- changeMp.f90 - change i_Mp value in a state file.
- change_Mp_alpha.f90 - make copies of a state, e.g. make a state 3x longer using 3 copies of a travelling wave, or insert 2 copies of an m=4 state in an m=2 domain.
Runtime processing
- analyse_runtime.f90 - Runtime processing template.
- newton.f90 - Newton-Krylov for pipe flow.
Non-problem-specific codes
- These are designed for integration with any pre-existing code.
- File:Arnoldi.f - Krylov-subspace method for calculating eigenvalues of a matrix.
- File:GMRESm.f90 - Krylov-subspace method for solving the linear system Ax=b for x.
- File:NewtonHook.f90 - Newton-hookstep method for finding nonlinear solutions x for F(x)=0.