r this
operation, the weights of the quadrature points do not factor in.)
Best
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opic of nonlinear solvers.
Specifically for fluid-structure interaction, people have posted a number of
links on the mailing list before (specifically Thomas Wick) and I would
suggest you search the archives.
Best
WB
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that the rest of the
paper -- the course design and assessment sections -- may still be useful to
those of you who are or are interested in teaching CS&E courses!
Best
Wolfgang
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Wolfgang
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ted a mesh with
40x40x36 cells, for example, then one would generate a 10x10x9 cell mesh and
refine it globally twice.
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rule them out if you actively test their
correctness.
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sers.
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For mai
ntify what changes you have made and list the
concrete lines where the newly introduced bug must be.
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est
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t. Can you create a small program that illustrates the issue you are facing?
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On 7/21/22 06:00, erkin yildiz wrote:
**
Can you please suggest me how to use only one or two cores? Please find
attached the log file
Use the flag -j1 or -j2 on the command line.
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Wolfgang Bangerth
ive you the adjacent cells to a vertex. At
the same time, this is not the preferred order of things, and it is not as
efficient as looping over cells and then the cells' components.
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his case VectorTools::interpolate_to_different_mesh has
to be used, am I right?
Yes. Or some other way to evaluate the solution on one mesh on the quadrature
points of another mesh.
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product of the two, summed
over the quadrature points.
Using this scheme, you never need the (expensive) function
VectorTools::interpolate_to_different_mesh.
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It might not be worth optimizing it any
further.
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2 block system in real/non-complex variables (like in step-29)
for which one could come up with block preconditioners and then apply the
existing GMRES implementation.
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video lecture on that topic :-)
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all I can offer.
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you can
remove should be removed one by one. This approach makes it so much easier to
see what the real problem is.
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with that goes beyond what the error message already says?
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WB
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'll have to try it out. I suspect that
the overall cost is dominated by computing the reference coordinates of an
arbitrary point, but I don't know for sure.
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dler::active_cell_iterator or hp::DoFHandler::active_cell_iterator as
first argument?
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/dof_tools.inst.in#L157
I wonder if there is a technical reason behind this
Not sure, most likely nobody needed it with dimwant to give it a try to add that instantiation? We'd of course accept a patch!
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Wolfgang Ban
se is to let the
factory function create a std::unique_ptr> which you can move
without actually touching the Simulator object.
The same applies to FESystem objects.
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ng nodes. This isn't worth it, and some of the
refinement flags will specifically avoid this kind of thing. You will want to
choose flags that allow it.
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nds to the faces of the other) then that mapping is easy to compute
and everything becomes easy. If the two meshes are completely unrelated, and
if the interface is curved, then things are difficult.
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.
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assed this as a flag to cmake?
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, and it was also
reverted a couple of weeks ago on the current development version that will
become 9.4.0. So the question is which exact version you are using?
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-heidelberg.de/index.php/ans/article/view/10305
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piece of code you're using, and what is the
error message?
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d::min(..., total_task_count)
That said, there is also this function that already does what you require:
https://dealii.org/developer/doxygen/deal.II/group__threads.html#ga86c4f26c4dacddd38ee225dd1796d7e1
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l
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ram in a debugger.
The debugger will stop when you hit an error (just after generating the
message above) and you can then call the 'backtrace' command in the debugger
to see where you are -- and this will then include line numbers.
Best
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want the
source directory to be ~/dealii-9.3.3. That's not what you want. As you
found out in your later mail, you want the source directory to be the
one you're currently in, that is ".".
Best
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-
On 6/1/22 21:04, 陈敏 wrote:
*
*
The patch has been pushed to my fork "doc/fix_update_flags_h".
Chen:
You will have to create a "pull request" so we know where to get the
changes from!
Best
Wolfgang
--
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hods.)
Best
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Wolfgang
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.
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For mailing list/forum
oved to a new machine, and the version of doxygen there is different.
We're working on fixing things! As you mentioned, the current workaround
is to use the documentation of an earlier version.
Best
Wolfgang
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processes, but I don't think that we want to guarantee that different
triangulation classes result in the same numbers of cells.
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ties (as indicated by the [velocity] extractor on the fe_values object),
then the result of that term ends up in the top left block of the matrix.
Similarly for the other combinations.
Best
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.
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---
You
different system where it does.
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WB
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something is
expensive and you want to do it in parallel, but outputting a couple of
numbers for each cell is not expensive.
Best
WB
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gid%2Fdealii%2F24beb6bb-e350-4c8a-a75d-691a48e6f9a2n%2540googlegroups.com%3Futm_medium%3Demail%26utm_source%3Dfooter&data=05%7C01%7CWolfgang.Bangerth%40colostate.edu%7C93909e30cad24c0a527308da38ce10db%7Cafb58802ff7a4bb1ab21367ff2ecfc8b%7C0%7C0%7C637884755678420908%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLC
is a modal
element that fits what you want to do. You probably want to look at
FE_QHierarchical.
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www:
hance know if it is plausible to do so?
Felix -- can you define what "simulation run" means, and what
"triggering a run" would involve?
Best
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0>
class
Yes, for boundary ids, this will do:
https://github.com/bangerth/helmholtz/blob/master/helmholtz.cc#L696-L747
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ry id of faces into the vtk file, or (ii) to
only output information on cells whose faces have a specific boundary id?
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is a
universe of parallel execution out there. It can only run with multiple
threads in a shared memory space on a single machine. It will definitely not
be able to use other machines.
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Wolfgang Ban
IjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=EOmx%2BHKi3VYd8JYSjTHjH0jdv8%2BZJDK0HeZrwYm1Kho%3D&reserved=0>.
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f
it.
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For mailing list/forum opti
step-29.
Yes, there are a number of functions in namespace DoFTools that you can use to
extract the indices of DoFs based on their vector component.
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, we
would gladly accept a patch!
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ine shown.
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in fact straight, and so whenever there is a hanging node
along such an edge, the two child edges geometrically cover the parent edge
exactly.
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an be used for second-order
problems without the reformulation to a first-order system? Or whether it can
be used for an altogether different equation?
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For
ing: The last argument you pass is a 'const Vector', but the
function you are trying to call requires a non-const vector. You can also see
this from the documentation of the function you are trying to call.
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sdata=DyeuUwE%2BH%2FQKzLAzF9lQhGU%2By4gvef3I%2FYUg%2FklzVJg%3D&reserved=0>.
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ugh that the issue is not visible.)
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if it had.
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inputs.template get_cell();
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class, and use it everywhere you
do integrals. Take a look at step-10 and -11, for example.
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www:
the polynomial degree of the finite element, you can of course expect smaller
errors on the same mesh.
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www:
omething else by hand.
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On 4/6/22 02:36, 陈敏 wrote:
solver.solve(system_matrix, solution, system_rhs,
PETScWrappers::PreconditionNone());
Can you try to use PreconditionIdentity() instead?
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ings down into smaller
pieces that can be debugged more easily. Simplifying the situation to
something for which it is easier to reason about the behavior is a key first
step in this process.
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iterative solver does not converge.
Both are easy enough to test. If it's the solver, you need to figure out why
that is.
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ctions are only
piecewise polynomial, whenever you integrate terms on these faces you
need to use iterated quadrature formulas. QIterated is your friend.)
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.
If you name these functions by a string, you can also just create function
objects on each process on-demand, as soon as a request to evaluate it for the
first time comes in.
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actually matter here). But
it can be done, and you might be interested in seeing something like
this in practice in this paper:
https://www.math.colostate.edu/~bangerth/publications/2016-nonconforming.pdf
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--
ng to do. Can you explain in more
detail?
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tches() with n_subdivisions>1. Take a look at the
documentation of that function.
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www: http://www.math.colos
problem.
I think you want to read through the module on vector-valued problems to
understand the general philosophy about dealing with vector problems.
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?
I'm not sure the former is possible in HDF5 at all.
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-
to have an
implementation that supports it.
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oblem.
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to output the starting vector you have via
DataOut to see whether it looks as you expect it to look like.
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t's not the same as a global projection, of course. I
suspect that this will not be more accurate than interpolation of boundary values.
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n. You can then solve
the resulting linear system. The mapping of DoF indices then also allows you
to get back at what the global index of these DoFs was.
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3, I believe. But
you can equivalently implement this line using
for (unsigned int v=0; v::vertices_per_face; ++v)
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installation as you used for deal.II?
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os/Trilinos/pull/9960
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ng a newer version of Trilinos.
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Fo
n do about your case.
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.
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first place where it is used) then.
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t should work if you added the #include directives mentioned
in these issues to the two libsc files. This may or may not be enough to get
things compiled...
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On 3/4/22 14:37, jack urombo wrote:
**
Does this replace all the four instances of *std::get *or just the
last two?
All of the ones where you call
std::get<...>(SI.iterators)
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uently the whole term
is always zero if i and j correspond to different vector components.
So I think it is right that the block never produces output. Why do you
think that it should?
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script and before
compiling p4est?
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The deal.II project is lo
LCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000&sdata=xPHuLbXYG8SbVTOQJ0PLCz4JqiaFJC7y%2F3AmI5V9N34%3D&reserved=0>.
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II. I believe that you need to write this as
std::get<0> (*SI)->get_dof_indices
now.
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www: http://www.m
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