Rewritten boundaries allow for a proper handling boundaries between
blocks at different refinement levels. Prolongation and restriction of
the boundaries are improved now.
Rewritten interpolation for prolongation and restriction.
References to the variable indices are assigned more properly.
VARIABLES
- add indices for the magnetic field components, both face and cell
centered
SOLVER, MHD
- add support for the magnetohydrodynamic (MHD) equations to the
subroutines cons2prim(), prim2cons()
- add MHD flux and the fastest speed calculation in the subroutine
fluxspeed()
- include magnetosonic speed in the calculation of the maximum speed in
the system required for estimation of the new time step
- extend the HLL solver in subroutine hll() to support MHD
- calculate the magnetic field update according to a CT scheme in the
subroutine update()
INTERPOLATION
- add subroutine magtocen() to interpolate cell centered magnetic field
EVOLUTION
- add evolution of the magnetic field components in the evolve_euler()
and evolve_rk2() time integration subroutines
- also call the subroutine magtocen() in the right places
BOUNDARY CONDITIONS
- support for magnetic field boundary update only in the case of blocks
with the same level so far; later we need to include proper
restriction and prolongation for the magnetic field to keep its
divergence equal zero
PROBLEMS, BLAST
- extend the blast problem to include the initial magnetic field
IO, HDF5
- write down in a HDF5 file magnetic field components
DATA I/O, HDF5
- arrays of indices, levels, and the block bounds cannot be stored as
attributes since they can easily exceed the allowed space for
attributes; instead, they have to be stored as dataset, which
overcome this limit
- store the lowest level block dimensions as well
IO, HDF5
- rewrite subroutine write_data() using more efficient storage,
especially with compression; we are storing only the domain part of
blocks and their primitive variables, which is selected by setting
ftype='p'; storing restart files with all parameters will be done
later
BLOCKS,
- remove array c(:,:,:) from data_block which stored the values for
refinement/derefinement estimations
MESH REFINEMENT, INITIAL GEOMETRY
- if there is only one block and it is set not to be refined, refine it
anyway to catch situations when the initial resolution is too small
for the problem initiation
MESH STRUCTURE, REFINEMENT
- subroutine prolong_block() has been completely rewritten; now it
supports 2D and 3D boxes, and the calculation of bounds for the
expanded array is automated now
MESH STRUCTURE, DEREFINEMENT
- subroutine restrict_block() has been completely rewritten; now it
supports 2D and 3D boxes, and the calculation of bounds for
source and destination arrays is automated
FIXES
- the field neigh of meta blocks structure must use ndims, nsides, and
nfaces variables
BLOCK STRUCTURE
- use pmeta and pdata names for ponters to meta and data blocks,
respectively; this helps reading the code
HOSTS
- turn on DEBUG
MESH STRUCTURE, MPI
- implement auto balancing, which resends the blocks to the neighboring
processors in order to keep the same number of data blocks on each
processor
MESH STRUCTURE, MPI
- correct the initial division of the geometry, so each process is
attached to the same number of blocks; blocks at the top level are
allowed to be attached to different processors even if they are
children of the same block
MESH STRUCTURE, MPI
- if the child blocks are selected to be derefined and lay on different
processors, move them all to the processor of the parent block
BLOCK STRUCTURE, MPI
- in the best division calculation use the number of data blocs only,
but if the blocks are at the top level and have the same parent
pack then together in the same process
MESH STRUCTURES
- since blocks which are not leafs are not used to calculate the fields
evolution, we don't need to keep their data blocks allocated; these
changes allocated the parent data block only for blocks which are
derefined, and deallocates data block of a block selected for
refinement; in the case of many blocks and many refinement levels
these modifications safe a substantial amount of memory
MESH STRUCTURE
- move the bounds of the block (xmin, xmax, ...) from data to the meta
structure; in this case we can deallocate data blocks without losing
the information about it bounds
PROBLEMS
- implement the blast problem in a similar way to the one implemented
in GODUNOV code
- generate initial domain of 2x3 blocks at the lowest level; it should
be generalized to any dimension of blocks
MESH STRUCTURE
- add new variable rdims(1:3) specifying dimensions of the initial
blocks structure at lowest level
- improve calculation of the effective resolution, and spatial
increments
MESH STRUCTURE
- subroutine mesh_update() performs refinement/derefinement of blocks
using new structures of meta and data blocks; it is implemented for
to be MPI friendly as well
- update subroutine derefine_block() to use new structures of meta and
data blocks
- update subroutines restrict_block() and prolong_block() to use new
meta and data structures
BOUNDARY CONDITIONS
- using a list of info blocks the implementation of boundary conditions
for neighbor blocks laying on different processors is successfully
completed; it is simpler and more clear than the previous
implementation
BOUNDARY CONDITIONS
- blocks belonging to the same process can exchange boundaries now;
blocks with neighbors from other processes still need to be updated
BLOCK STRUCTURE
- a new structure block_info has been added which will be used for
defining lists of blocks which have neighbors belonging to other
processes; these lists will be later used to exchange block data
BLOCK STRUCTURE: MPI
- divide initial block structure between all processors and remove
non-local data blocks
DATA I/O
- dump the total number of blocks and the number of data blocks
BOUNDARY CONDITIONS
- initial work on the boundary condition for new structure of blocks
MESH STRUCTURE
- with new meta and data block structures the refinement of a block
works correctly now
- increase and decrease the number of blocks while allocated and
dealocated, respectively
MESH STRUCTURE
- add subroutines metablock_setleaf(), metablock_unsetleaf() to set and
unset the leaf flag of a meta block
- add subroutine metablock_setconfig() to set the config of a block
- add subroutine metablock_setlevel() to set the refinement level of a
block
