- when an episode/report step is over, the next is started by endEpisode()
- the problem does not deal with updating the simulation time anymore
- rename `episodeIdx` in to `reportStepIdx` the 'EclWriter' because
this variable is -- and always has been -- the report step number
used by some parts of `opm-output`'s ECL writing code (the report
step number is equivalent to the episode index plus 1). IMO, the
output and parser code should be made more consistent in regard of
whether it expects 0-based or 1-based indices, but this is a story
for another day.
before patch, setting the `EnableEclOutput` parameter to `false`
resulted in the `eclWriter_` not to be allocated; yet it was used in
some places. this resulted in segfaults.
medium term, the output and restart file writing should be refactored:
the simulator does not need to be aware of this because it can be
accomplised in the problem's endTimeStep() method.
this avoids regressions for decks that use well testing and makes
`ebos` work as expected if UMFPACK is not available, but obviously it
will not work for decks that use multisegment wells in earnest.
`flow` is unaffected by this because it does not use this type tag.
maybe this needs to be reverted since the code in question can
cause the simulation to abort inadvertently.
As usual, `flow` is unaffected because this functionality is only
called in experimental mode and flow calls it itself.
this is part of the release maintainance. in this context "core
headers" means the ones which do not include the well model headers,
and only those which are concerned with non-exotic functionality,
e.g., the PolyhedralGrid and ALUGrid vanguards are not changed.
the only thing which this does so far is to introduce the respective
property and `ebos` will abort the run if the deck requests API tracking.
As usual for experimental features, `flow` is unaffected.
Concretely this avoids having to patch eWoms by adding a generic
`Opm::transposeDenseMatrix()` template function instead of relying on
the dense matrix class to provide a `transpose()` method.
for some reason, this yields quite different results for norne than
the default variant, e.g. when comparing PRESSURE, we get
```
> compareECL -k PRESSURE -t UNRST ebos/NORNE_ATW2013 ebos_altidx/NORNE_ATW2013 1 1e-4
Comparing 'ebos/NORNE_ATW2013' to 'ebos_altidx/NORNE_ATW2013'.
Comparing PRESSURE...
Occurrence in first file = 9
Occurrence in second file = 9
Value index = 0
(first value, second value) = (254.195, 253.191)
Program threw an exception: [/home/and/src/opm-common/build-cmake/fake-src/examples/test_util/EclRegressionTest.cpp:161] Deviations exceed tolerances.
The absolute deviation is 1.00311, and the tolerance limit is 1.
The relative deviation is 0.00394624, and the tolerance limit is 0.0001.
```
IMO this is a bug, but the reasons for it are currently unknown.
this simply excludes the disabled simulators from `make all` while
`make flow` will continue to work even if the cmake variable
`BUILD_FLOW` was set to `OFF`. This requires a small patch for
opm-common.
these variants should cover most of the common use cases. That said,
there are no plans to provide simulators for combinations of blackoil
extensions or a "multiplexing" simulator like `flow`: If someone is
interested in e.g., an oil-water simulator with polymer and energy
enabled, a separate self-compiled executable should be added locally.
the idea is to compensate the residual of the final solution of a time
step by means of an opposing source term in the next time step.
This patch has been developed as a joint project with [at]totto82 and
[at]osae.
(`flow` is unaffected by this because for now drift compensation is an
experimental feature and thus disabled within the production
simulator.)
for some reason, libraries produced for a module are not linked to the
executables of the module by the default build system. so far this did
not matter for `ebos` but with this PR, it starts using stuff from
`libopmsimulators`...
This enables `ebos` to run Norne and other non-trivial data
sets. While at it, adapt the tolerances by `ebos`.
This patch only affects the research simulator, i.e. `flow` is
unaffected by it.
these parameters where introduced with support for the TUNIING keyword
in `ebos`. since `flow` implements its own time stepping these
parameters are unused and should thus be hidden from view in it.
the former is caught by `ebos`, while the latter isn't. Alternatively,
this can be fixed by deriving `LinearSolverProblem` from
`NumericalIssue`, if preferred.
this bitrot a bit because it was never seen by the compiler. (I still
did not check if `ebos` compiles and works if `CpGrid` is replaced by
dune-alugrid or `PolyhedralGrid`.)
the convergence behaviour can now be understood and the report step
information is printed, too. This does not affect `flow`, becase it
implements its own newton and time stepping routines.
the speedup gained by parallelism here are simply not worth the
headaches.
note that `flow` is unaffected by this because it uses
`Opm::BlackoilWellModel`.
the original purpose of those is to provide a checkpoint/restart
mechanism using an ad-hoc file format. They might also be useful for
implementing the adjoint functionality, though.
using the eWoms API for wells, the Schur compliment was not applied at
all. If `BlackOilWellModel::linearize()` was made non-trivial, the
Schur complement was applied twice in `flow`. With this patch, we only
apply this using the eWoms API (in
`BlackOilWellModel::linearize()`). I could not observe a signficant
effect on the convergence behaviour of `flow` for the cases which I
tested (Norne and realization 5 of Model 2).
this is a compile time switch with the intention to be able to more
easily turn experimental features that are not yet considered to be
production quality on and off. DUNE has a similar mechanism (i.e., the
`DUNE_GRID_EXPERIMENTAL_GRID_EXTENSIONS` macro), but it relies on
the preprocessor.
For now, the property does not have any effect.
this hopefully makes the purpose of `ebos` clear in its
description. this prose should be interpreted as "if you use ebos in
production, you are on your own and you should only expect a very
limited amount of support (or even sympathy) if something breaks".
in particular the missing synchronization after restarts was very
nasty to find. thanks a ton for pointing this out!
also, IIRC changing DR[SV]DT in the schedule section has been working
properly for a while, so the comment which stated the opposite is
removed as well.
Some time loop stuff was missing in the doobly-doo, the init() method
of the well model was not called and there was the slightly deeper
issue that the initial solutions where not calculated on restarts
which breaks everything that relies on them. (at the moment, that's
everything which is related to non-trivial boundary contitions.)
the purpose of this was a hack to be able to manipulate the Jacobian
matrix directly from outside code. Since `flow` has been converted to
the eWoms wells API, this is not required anymore.
I tested #1712 without deriving the `EclFlowProblem` type tag from
`FlowIstlSolver`, and it worked because the linear solver was still
`Opm::ISTLSolverEbos` because the linear solver is set via the
`LinearSolverSplice` a few lines down.
This time, I verified that the
`Ewoms::Linear::ParallelBiCGStabSolverBackend` was used if the
offending line was commented out. also, Norne worked fine with the
default solver as long as the Schur complement for the wells was done
explicitly.
Finally, the naming of the eWoms API is a bit inconsistent
(`setMatrix()` vs. `setResidual()`). any opinions here? I'm fine with
whatever.
the parameter is called `EclNewtonSumToleranceExponent`. if it is set
to 1, the specified tolerance will be used directly. (this is not
desireable in the general case though, because at the same result
quality, the sum error for large reservoirs can be larger than for
small ones.)
albeit, we scale the error only to the cube root of the pore
volume. the rationale is that the same amount of mass can get lost
"along" a line for each timestep.
maybe it would be a good idea to do something like this for time step
size as well because taking multiple small time steps currently allows
a much larger error in the result than doing it in one big step.
the flags which I used are
```
-pedantic \
-Wall \
-Wextra \
-Wformat-nonliteral \
-Wcast-align
-Wpointer-arith \
-Wmissing-declarations \
-Wcast-qual \
-Wshadow
-Wwrite-strings \
-Wchar-subscripts \
-Wredundant-decls \
-fstrict-overflow \
-O3 \
-march=native \
-DNDEBUG=1
```
note that some heavy filtering is not the worst idea because DUNE is
far from not emiting any warnings with these flags.
Also, there were some pesky warnings in test_ecl_output which I don't
know how to fix:
```
tests/test_ecl_output.cc:218:73: warning: missing initializer for member ‘Opm::data::Connection::effective_Kh’ [-Wmissing-field-initializers]
```
some weird hacks (hello, DR[SV]DT) cause a change of the storage term
in the first Newton-Raphson iteration compared to the solution of the
previous time level. In order to use the correct values, one thus must
explicitly recompute the storage term for the previous time step
instead of just reusing the result of the first Newton-Raphson
iteration of the current time step.
the way to get the result of an evaluation is by return value, i.e.,
z = fn.eval(x, y);
not by passing a separate argument to the eval() function like
fn.eval(x, y, z);
the `XYTabulated2DFunction` used the latter approach causing an API
inconsistency with all other tabulation classes in
opm-material. OPM/opm-material#319 fixes that but requires this mop-up
as a consequence.
IMO the simulator should not be in the business of managing low-level
parser objects in the first place, because that's what EclipseState is
supposed to do?!
anyway, since these objects are not needed to decide which simulator
to use, they are now always managed internally by the vanguard, i.e.,
setExternalDeck() does not take them anymore.
it is possible that a dune entity vanishes if its iterator gets out of
scope. Whether this is a problem or not seems to be be highly depend
on the used configuration...
also, clean them up a bit:
- do not use the intensive quantities cache directly anymore. (i.e.,
that code should now work if the IQ cache is disabled)
- do not fiddle with the global Jacobian matrix and residual vector
directly. Instead, implement the water fluxes to the reservoir as a
source term like wells.
one thing that did not become fully clear to me is if each aquifer
ought to be assumed to be in contact with the whole reservoir or just
a few cells on the boundary. The current implementation goes down the
former path, while, without any deeper knowledge, I would rather
suppose that the latter applies. maybe my understanding of this is
just too limited, though.
Andreas Lauser