| Commit message (Collapse) | Author | Age |
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New integrator Euler. This is an explicit, first-order method, mostly
useful for debugging.
New integrators AB (Adams-Bashforth) with various orders. These are
explicit integrators using several past timelevels to provide
higher-order integration with a single RHS evaluation each.
Introduce LinearCombination, a generic routine to calculate linear
combinations of grid functions. This simplifies existing code, and can
be overloaded if MoL should run on a device (e.g. with OpenCL).
Replace cctk_lsh with cctk_ash where necessary.
git-svn-id: http://svn.cactuscode.org/arrangements/CactusNumerical/MoL/trunk@190 578cdeb0-5ea1-4b81-8215-5a3b8777ee0b
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The compiler doesn't know that CCTK_WARN(0,…) is fatal.
git-svn-id: http://svn.cactuscode.org/arrangements/CactusNumerical/MoL/trunk@189 578cdeb0-5ea1-4b81-8215-5a3b8777ee0b
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git-svn-id: http://svn.cactuscode.org/arrangements/CactusNumerical/MoL/trunk@180 578cdeb0-5ea1-4b81-8215-5a3b8777ee0b
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Flags indicate whether it is time to execute slow RHS computation.
For instance, in the RK4-RK2 scheme, there are 4 substeps in total, but the RK2 RHS are only evaluated in the very first and in the very last step of the four substeps.
From: Christian Reisswig, minor changes by Roland Haas
git-svn-id: http://svn.cactuscode.org/arrangements/CactusNumerical/MoL/trunk@175 578cdeb0-5ea1-4b81-8215-5a3b8777ee0b
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Remove now-unused and currently broken OldBoundary infrastructure
git-svn-id: http://svn.cactuscode.org/arrangements/CactusNumerical/MoL/trunk@153 578cdeb0-5ea1-4b81-8215-5a3b8777ee0b
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git-svn-id: http://svn.cactuscode.org/arrangements/CactusNumerical/MoL/trunk@144 578cdeb0-5ea1-4b81-8215-5a3b8777ee0b
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various routines in LEVEL mode.
git-svn-id: http://svn.cactuscode.org/arrangements/CactusNumerical/MoL/trunk@119 578cdeb0-5ea1-4b81-8215-5a3b8777ee0b
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git-svn-id: http://svn.cactuscode.org/arrangements/CactusNumerical/MoL/trunk@113 578cdeb0-5ea1-4b81-8215-5a3b8777ee0b
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This integrator is similar to the existing RK45 integrator. It also
supports adaptive time stepping, but uses slightly different
coefficients. The Numerical Recipes say that it has "slightly better
error properties".
git-svn-id: http://svn.cactuscode.org/arrangements/CactusNumerical/MoL/trunk@110 578cdeb0-5ea1-4b81-8215-5a3b8777ee0b
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As yet not altered to do grid arrays.
As with RK45, adaptive timestepping does not work with mesh refinement.
git-svn-id: http://svn.cactuscode.org/arrangements/CactusNumerical/MoL/trunk@106 578cdeb0-5ea1-4b81-8215-5a3b8777ee0b
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The current time and the time step sizes were not set correctly. That
led to first order convergence instead of fifth order convergence.
git-svn-id: http://svn.cactuscode.org/arrangements/CactusNumerical/MoL/trunk@101 578cdeb0-5ea1-4b81-8215-5a3b8777ee0b
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Agrees with other RK3's to floating point round off (except at
boundaries) for linear case. Uses more storage and is slower than
standard RK3 so I don't recommend it.
This showed up (so I fixed) a bug with the generic methods when used
with Carpet.
git-svn-id: http://svn.cactuscode.org/arrangements/CactusNumerical/MoL/trunk@72 578cdeb0-5ea1-4b81-8215-5a3b8777ee0b
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git-svn-id: http://svn.cactuscode.org/arrangements/CactusNumerical/MoL/trunk@71 578cdeb0-5ea1-4b81-8215-5a3b8777ee0b
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git-svn-id: http://svn.cactuscode.org/arrangements/CactusNumerical/MoL/trunk@32 578cdeb0-5ea1-4b81-8215-5a3b8777ee0b
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RK3. The optimized version of the TVD RK3 solver. Requires no scratch space so is about as efficient as ICN, but third order.
Generic method from a parameter table. By specifying the number of intermediate steps and the alpha and beta arrays, create your own method at parameter time. Not well (or at all) documented because it doesn't seem to work correctly at the moment.
Some tidying of extraneous code as well.
git-svn-id: http://svn.cactuscode.org/arrangements/CactusNumerical/MoL/trunk@29 578cdeb0-5ea1-4b81-8215-5a3b8777ee0b
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git-svn-id: http://svn.cactuscode.org/arrangements/CactusNumerical/MoL/trunk@25 578cdeb0-5ea1-4b81-8215-5a3b8777ee0b
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steps are always at t+dt.
git-svn-id: http://svn.cactuscode.org/arrangements/CactusNumerical/MoL/trunk@24 578cdeb0-5ea1-4b81-8215-5a3b8777ee0b
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Carpet runs.
git-svn-id: http://svn.cactuscode.org/arrangements/CactusNumerical/MoL/trunk@20 578cdeb0-5ea1-4b81-8215-5a3b8777ee0b
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BSSN_MoL testsuite bh_shift_rad to fail.
git-svn-id: http://svn.cactuscode.org/arrangements/CactusNumerical/MoL/trunk@18 578cdeb0-5ea1-4b81-8215-5a3b8777ee0b
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Schnetter.
git-svn-id: http://svn.cactuscode.org/arrangements/CactusNumerical/MoL/trunk@16 578cdeb0-5ea1-4b81-8215-5a3b8777ee0b
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MoL. Don't know why I did this in the first place.
git-svn-id: http://svn.cactuscode.org/arrangements/CactusNumerical/MoL/trunk@15 578cdeb0-5ea1-4b81-8215-5a3b8777ee0b
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Only works with ICN or RK2 for now - in fact this commit may break the generic RK methods temporarily.
Note the documentation isn't quite right - there's no longer a seperate function for each different type...
git-svn-id: http://svn.cactuscode.org/arrangements/CactusNumerical/MoL/trunk@12 578cdeb0-5ea1-4b81-8215-5a3b8777ee0b
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as array sizes...).
git-svn-id: http://svn.cactuscode.org/arrangements/CactusNumerical/MoL/trunk@11 578cdeb0-5ea1-4b81-8215-5a3b8777ee0b
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git-svn-id: http://svn.cactuscode.org/arrangements/CactusNumerical/MoL/trunk@7 578cdeb0-5ea1-4b81-8215-5a3b8777ee0b
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Remove old, buggy commented out stuff.
git-svn-id: http://svn.cactuscode.org/arrangements/CactusNumerical/MoL/trunk@6 578cdeb0-5ea1-4b81-8215-5a3b8777ee0b
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Change the grid scalar used in the schedule.ccl from MoL2->MoL (necessary).
git-svn-id: http://svn.cactuscode.org/arrangements/CactusNumerical/MoL/trunk@4 578cdeb0-5ea1-4b81-8215-5a3b8777ee0b
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MoL provides generic integration methods for multiple thorns simultaneously. By providing a layer between the driver and evolution thorns, this should mean that some technical issues to do with mesh refinement can be ignored. It also allows you to choose different evolution methods (in time, at least). But the primary purpose is to unambiguously evolve models in different thorns at the same time.
This is version 2 - the one that will work with mesh refinement. It's a straight copy of HawkeCVS/Public/CactusMoL2/MoL2 and I haven't checked that it will work "as is" with the new name (one of the reasons it goes into Alpha).
At the moment the only evolution method guaranteed to work with mesh refinement is ICN, although RK2 should. The generic RK methods will do something that will be subtly wrong...
Note that the "old" way of registering variables (through the functions declared in header files) is still there. As soon as function aliasing settles down, this will be removed.
Also to be done:
Better documentation
Tidy up the code (especially the debugging statements)
Optimize
Add various useful time evolution methods.
git-svn-id: http://svn.cactuscode.org/arrangements/CactusNumerical/MoL/trunk@2 578cdeb0-5ea1-4b81-8215-5a3b8777ee0b
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