- if we use forcing in the case of adiabatic equation of state, the
total energy of each cell must be updated by the kinetic energy
injected to this cell; otherwise the energy conservation will be
violated;
- implement subroutine flux_rk2() which calculates fluxes at time t and
t + dt and averages them; then the calculated flux is passed to
variable update;
- implement subroutine advance_solution() which advances an array of
conserved variables using fluxes provided as an argument;
- use advance_solution() in update_solution();
- subroutine boundary_correct_fluxes() sweeps over all leafs and if it
finds that a neighbor is at higher level, performs a correction of
the numerical flux of current block in this direction; this
subroutine does not support MPI yet!;
- subroutine correct_flux() performs the atual correction of the
numerical flux; only part belonging to domain is updated, since ghost
zones are updated anyway in the next step during the variable update;
- call boundary_correct_flux() from evolve();
- after calculating an integrals of fluxes with a given order we
performed one step updated of the conserved variables stored in data
blocks using corresponding numerical flux stored in the same data
block; the subroutine which performs update is called
update_solution();
- change order of calculating terms; first perform the main update
of the conserved variables, then add forcing and source terms; in
this way we do not change time step which determines the stability of
scheme before the conserved variables enter Riemann solver; this is
especially important in highly supersonic simulations, when in the
presence of very low density, even small change of velocity can make
the scheme numerically unstable;
- call subroutine evolve_forcing() before the update of all blocks;
this subroutine evolves the forcing source terms by an interval dt in
the Fourier space; then during the update the forcing Fourier
coefficients will be transformed to real space for each block
separately;
- pass the spacial increment to the reconstruction subroutine since
some interpolation methods require it; in addition, move obtaining
the spacial interval and its inversion to the subroutine update();
- remove subroutine advance(); this subroutine is good for GALERKIN
approach; it's gonna be reintroduced during this method
implementation;
- remove subroutine update_flux(); this subroutine is called from
advance() and is not used in the GLM-MHD approach;
- make GNU Fortran happy bu adding () to the subroutine calls;
- make the variable cmax global in the module 'evolution';
- add a new subroutine update_maximum_speed() which updates the maximum
speed cmax in the system iterating over all data blocks;
- use the subroutine update_maximum_speed() in evolve();
VARIABLES
- create new module 'variables' which stores references to variable
indices; we gonna store dofferent objects related to variables in
this module;
BLOCK STRUCTURE
- add new array to the data block structure to store the electromotive
force components; these components are located at the centers of cell
edges, in this way the CT update of the staggered magnetic field
component will be easier;
EVOLUTION
- add new subroutine advance() which performs several steps in order to
advance the solution in time by one-step update; the substeps are the
updates of the numerical flux, the flux boundary, the advance in time
the solution, the updates of mesh structure, and the boundaries of
conserved variables, and finally the new time step estimation;
- add new subroutine update_flux() to update the numerical fluxes
stored in the data blocks;
SCHEME
- add new subroutine numerical_flux() to calculate fluxes at the proper
locations;
- add new logical argument to HLL and HLLC in order to specify if the
flux should be returned as a numerical flux or its derivative;
EVOLUTION
- add new output argument returning the updated fluxes for each block;
SCHEME
- update the fluxes from the one dimensional fluxes returned by the
Riemann solver;
BOUNDARY CONDITIONS
- use TVD interpolation for prolongation of the boundary conditions
CONFIGURATION
- put lower limit for the number of ghost and domain cells
HOST FILES
- host files should not be included in the revision control
INTERPOLATION
- define all arrays as REAL, not REAL(KIND=8) since the precision of
calculations is determined at the compilation stage
- replace j0 and j1 indices with new more obvious il and ir
MESH
- update mesh before calculating new time step
SCHEME
- implement Flux-CT scheme for the staggered magnetic field
integration;
BLOCK STRUCTURE
- use more space efficient storage of the variables, which means
storing only staggered components of magnetic field; cell-centered
components are calculated only when necessary;
EVOLUTION
- remove loops in the field updates; operations are performed on the
arrays;
BOUNDARY CONDITIONS
- remove loops in the bnd_copy; operations are calculated on the whole
array now;
INTERPOLATION
- subroutine magtocen() has been rewritten to avoid problems with the
array allocation; now as an argument we enter the array of all
variables; subroutine uses indices for the face-centered and
cell-centered magnetic field components internally;
MAKE
- add flag defining Flux-CT scheme;
PROBLEM
- use predefined array variables instead of allocated;
