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* (+) Added the capability to specify grid offsets in derivative and dissipationkorobkin2008-04-28
| | | | | | | | operators, as set by boundary_shiftout* parameters of CoordBase. Only first-order centered derivative operators are affected. git-svn-id: https://svn.cct.lsu.edu/repos/numrel/LSUThorns/SummationByParts/trunk@105 f69c4107-0314-4c4f-9ad4-17e986b73f4a
* Remove unused local variablesschnetter2008-04-08
| | | | git-svn-id: https://svn.cct.lsu.edu/repos/numrel/LSUThorns/SummationByParts/trunk@97 f69c4107-0314-4c4f-9ad4-17e986b73f4a
* Simplify some expressions calculating dissipation coefficients. Thisschnetter2006-08-26
| | | | | | | | | | makes it compile with certain versions of gfortran. Change type of argument "part" to set_dmatrix_half from CCTK_INT to integer since it is called with integer (not CCTK_INT) values. git-svn-id: https://svn.cct.lsu.edu/repos/numrel/LSUThorns/SummationByParts/trunk@77 f69c4107-0314-4c4f-9ad4-17e986b73f4a
* Replace numbers of the form "0_wp" with "0.0_wp". The former definesschnetter2006-06-11
| | | | | | | integer constants, whereas real constants are intended. git-svn-id: https://svn.cct.lsu.edu/repos/numrel/LSUThorns/SummationByParts/trunk@74 f69c4107-0314-4c4f-9ad4-17e986b73f4a
* Fixed stupid mistake in having the assignment of stored coefficients anddiener2006-04-21
| | | | | | | deallocation of the temporary array within the wrong if statement. git-svn-id: https://svn.cct.lsu.edu/repos/numrel/LSUThorns/SummationByParts/trunk@67 f69c4107-0314-4c4f-9ad4-17e986b73f4a
* Two part update of the restricted full norm dissipation operators. The firstdiener2006-03-10
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | part is an optimisation. Previously the coefficients were constructed every time the dissipation was applied. This turned out to have a significant overhead, especially for large domains. Now the coefficients are constructed only once for each patch on each processor and stored. The thorn now uses the aliased functions MultiPatch_GetMap and MultiPatch_GetMaps (provided by thorn MultiPatch) to figure out how many patches are present and which patch is currently being worked on. These dissipation operators will not work unless the MultiPatch thorn is used. Right now this should not be a problem (but can be changed if it is), unless somebody uses dissipation operators outside of the multipatch infrastructure. The second part is an update aimed at making the restricted full norm dissipation operators better behaved on grids with very different number of grid points in different directions. For that reason the parameter: diss_fraction has been made vector valued (of length 3), so that the width of the transition region from the boundary to the interior operators can be controlled separately in the 3 dimensions. Unfortunately this means that any parameter files, that explicitly sets this parameter, will have to be modified. I don't think too many people are using the restricted full dissipation operators yet, so it shouldn't cause too many problems. In additiona new parameter: h_scaling has been introduced. This parameter is also vector valued of length 3 and allows the local grid spacing to be rescaled to more closely resemble the physical grid spacing in any dimension. Note, these changes only affect the non-diagonal dissipation operators. git-svn-id: https://svn.cct.lsu.edu/repos/numrel/LSUThorns/SummationByParts/trunk@61 f69c4107-0314-4c4f-9ad4-17e986b73f4a
* Add new parameters derivatives_zero_y and derivatives_zero_z in order todiener2006-02-14
| | | | | | | | | | | | | | ecplictly setting any derivatives in the y- and/or z-direction to zero when simulating 1- or 2-D problems with a 3D code. This avoids issues with errors at roundoff level in the y- and z-directions. Should be used with care and together with the parameter check_grid_sizes to avoid complaints about too small grids in the y- and z-directions. Has only been tested in a few cases. If problems are caused by this commit, please report them immediately. git-svn-id: https://svn.cct.lsu.edu/repos/numrel/LSUThorns/SummationByParts/trunk@59 f69c4107-0314-4c4f-9ad4-17e986b73f4a
* Kreiss-Oliger type dissipation for the restricted full norm 4-3 operator.diener2006-02-03
git-svn-id: https://svn.cct.lsu.edu/repos/numrel/LSUThorns/SummationByParts/trunk@57 f69c4107-0314-4c4f-9ad4-17e986b73f4a