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* Correct typographical erroreschnett2012-07-21
| | | | git-svn-id: https://svn.cct.lsu.edu/repos/numrel/LSUThorns/SummationByParts/trunk@134 f69c4107-0314-4c4f-9ad4-17e986b73f4a
* Update the description of a couple of parameters with misleading names.diener2010-03-10
| | | | git-svn-id: https://svn.cct.lsu.edu/repos/numrel/LSUThorns/SummationByParts/trunk@119 f69c4107-0314-4c4f-9ad4-17e986b73f4a
* Introduce a boolean parameter to switch of SBP near outer boundary. Insteaddiener2009-03-31
| | | | | | | | switch to progressively lower order centered stencil as the boundery is approached, similar to what is done with the second order and upwind stencils. git-svn-id: https://svn.cct.lsu.edu/repos/numrel/LSUThorns/SummationByParts/trunk@118 f69c4107-0314-4c4f-9ad4-17e986b73f4a
* Make parameters restricted to allow GlobalDerivative to use them.diener2009-03-18
| | | | git-svn-id: https://svn.cct.lsu.edu/repos/numrel/LSUThorns/SummationByParts/trunk@117 f69c4107-0314-4c4f-9ad4-17e986b73f4a
* Added functionality to set up public grid functions (sbp_dx, sbp_dy, sbp_dz)diener2008-07-14
| | | | | | | | | | | containing the delta's used in the Kreiss-Oliger type dissipation. This is activated with a parameter (use_variable_deltas) and a routine (SBP_DeltaInitial) is scheduled at BASEGRID to set the default values initially. The grid functions can be modified later by a scheduled user function if so desired. git-svn-id: https://svn.cct.lsu.edu/repos/numrel/LSUThorns/SummationByParts/trunk@116 f69c4107-0314-4c4f-9ad4-17e986b73f4a
* Add non-sbp upwinding operators. These have the same order as the centereddiener2008-05-08
| | | | | | | operators but does not satisfy any SBP property. git-svn-id: https://svn.cct.lsu.edu/repos/numrel/LSUThorns/SummationByParts/trunk@114 f69c4107-0314-4c4f-9ad4-17e986b73f4a
* (+) implemented poisoning: added three parameterskorobkin2008-05-02
| | | | | | | | | | | | - poison_derivatives - poison_dissipation - poison_value The first two set values of derivative GF and RHS respectively to poison_value in boundary_shiftout zone, which is specified by CoordBase shiftout parameters. git-svn-id: https://svn.cct.lsu.edu/repos/numrel/LSUThorns/SummationByParts/trunk@111 f69c4107-0314-4c4f-9ad4-17e986b73f4a
* Add stencils for non-SBP operators.diener2008-04-18
| | | | git-svn-id: https://svn.cct.lsu.edu/repos/numrel/LSUThorns/SummationByParts/trunk@104 f69c4107-0314-4c4f-9ad4-17e986b73f4a
* Add two new parameters onesided_outer_boundaries andschnetter2008-04-08
| | | | | | | | | onesided_interpatch_boundaries. These decide whether the user wants one-sided differencing stencil near outer and near multi-patch boundaries. Both default to yes for backward compatibility. git-svn-id: https://svn.cct.lsu.edu/repos/numrel/LSUThorns/SummationByParts/trunk@96 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
* Introduce a new kind of dissipation operators. Kreiss-Oliger type dissipationdiener2005-12-15
| | | | | | | | | | | operator suitably modified near the boundary. Since the dissipation operator in the interior uses a stencil that is one point wider than the derivative operator, an additional check on the number of ghostzones in multi processor runs have been added. Only implemented for the 8-4 and optimized 6-5 operators. git-svn-id: https://svn.cct.lsu.edu/repos/numrel/LSUThorns/SummationByParts/trunk@53 f69c4107-0314-4c4f-9ad4-17e986b73f4a
* Added a new boolean parameter "scale_with_h" that allows the user todiener2005-12-06
| | | | | | | | choose to scale the dissipation with the grid spacing h. This results formally in the loss of one order of convergence. The default value is "no". git-svn-id: https://svn.cct.lsu.edu/repos/numrel/LSUThorns/SummationByParts/trunk@52 f69c4107-0314-4c4f-9ad4-17e986b73f4a
* Changed the default operator type to "Optimized". Added in the comment thatdiener2005-11-29
| | | | | | | 8-4 is minimal spectral radius instead of minimal bandwidth. git-svn-id: https://svn.cct.lsu.edu/repos/numrel/LSUThorns/SummationByParts/trunk@45 f69c4107-0314-4c4f-9ad4-17e986b73f4a
* Added a boolean parameter "check_grid_sizes" to turn off checking of grid sizesdiener2005-06-10
| | | | | | | | | | and ghost zones. This is useful for Burkhard, when he wants to use the operators in lower dimensional cases. It could be done in a more selective way, so the checks were done where it makes sense, but this will have to do for now. git-svn-id: https://svn.cct.lsu.edu/repos/numrel/LSUThorns/SummationByParts/trunk@37 f69c4107-0314-4c4f-9ad4-17e986b73f4a
* Dissipation operator for the optimized 4-3 restricted full norm case. Testingdiener2005-05-25
| | | | | | | still in progress, but it looks like the convergence order is right. git-svn-id: https://svn.cct.lsu.edu/repos/numrel/LSUThorns/SummationByParts/trunk@33 f69c4107-0314-4c4f-9ad4-17e986b73f4a
* New 4-3 and 6-5 operators that are optimised for accuracy. Added a newdiener2005-05-12
| | | | | | | parameter to choose between minimim bandwidth and optimized operators. git-svn-id: https://svn.cct.lsu.edu/repos/numrel/LSUThorns/SummationByParts/trunk@31 f69c4107-0314-4c4f-9ad4-17e986b73f4a
* Implementation of 6th order dissipation operator compatible with the 6-5diener2005-02-08
| | | | | | | | | | | | | | | | | | finite difference operators. Not fully tested yet. The MoL dissipation interface was shamelessly stolen from Eriks Dissipation thorn (in AEIThorns). Things to do: Add a test for the presence of MoLQueryEvolvedRHS (since the use of dissipation is optional, I didn't want to require the presence of this routine). Add compatible dissipation operators to the other finite difference operators. More testing. git-svn-id: https://svn.cct.lsu.edu/repos/numrel/LSUThorns/SummationByParts/trunk@21 f69c4107-0314-4c4f-9ad4-17e986b73f4a
* Make choice of difference operators steerableschnetter2004-11-04
| | | | git-svn-id: https://svn.cct.lsu.edu/repos/numrel/LSUThorns/SummationByParts/trunk@13 f69c4107-0314-4c4f-9ad4-17e986b73f4a
* Added 4-3 Full restricted norm operators. Added parameter to choose the typediener2004-10-11
| | | | | | | | | of differences (diagonal, full restricted). Added routine to return the coefficient of the norm at the boundary. Added routine to return the mask for the norm calculation. git-svn-id: https://svn.cct.lsu.edu/repos/numrel/LSUThorns/SummationByParts/trunk@10 f69c4107-0314-4c4f-9ad4-17e986b73f4a
* Added 8-4 derivatives. Note only Diff_gv has been updated to use it. Diff_gfdiener2004-10-07
| | | | | | | has to be modified in other ways as well. git-svn-id: https://svn.cct.lsu.edu/repos/numrel/LSUThorns/SummationByParts/trunk@9 f69c4107-0314-4c4f-9ad4-17e986b73f4a
* Patch from Erik to make the order even.diener2004-10-06
| | | | git-svn-id: https://svn.cct.lsu.edu/repos/numrel/LSUThorns/SummationByParts/trunk@6 f69c4107-0314-4c4f-9ad4-17e986b73f4a
* First attempt at a summation by parts finite differencing thorn.diener2004-10-06
git-svn-id: https://svn.cct.lsu.edu/repos/numrel/LSUThorns/SummationByParts/trunk@2 f69c4107-0314-4c4f-9ad4-17e986b73f4a
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