I would guess this would rather be the degeneration of ILUt in parallel
than the
implementation.
If I am not wrong, ILU-T in parallel is not ILU-like preconditioner
anymore, right? I remember
the inter-core part is implemented in a block-Jacobi fashion.
I've never used ILUT but used ILU a lot.
Yep! I noticed that when doing my PR today.
在 2018年4月5日星期四 UTC-7下午5:45:28，Wolfgang Bangerth写道：
>
> On 04/05/2018 12:30 PM, Weixiong Zheng wrote:
> >
> > I always see spacedim and dim but couldn't tell what exactly they mean.
> > Unfortunately, there seems not to be an
PR has been approved and will be merged sometime. Thanks for fill
the project name into Applications entry.
在 2018年4月5日星期四 UTC-7下午3:48:05，Wolfgang Bangerth写道：
>
>
> Weixiong,
>
> > By instruction, it's actually more for the testing. Maybe I will just
> > follow how the other functions are
I see. I normally do volumetric computations which was why I didn't
understand why one differs from the other. Thanks.
在 2018年4月5日星期四 UTC-7上午11:46:49，Daniel Arndt写道：
>
> Weixiong,
>
> Have a look at step-38 (
> https://www.dealii.org/8.5.0/doxygen/deal.II/step_38.html) for an example.
> We oftn
Hi
I always see spacedim and dim but couldn't tell what exactly they mean.
Unfortunately, there seems not to be an explanation in Glossary. Could
anybody pls spare a min to enlighten me?
Thanks,
Weixiong
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For mailing list/forum
Sir
The Issue 6158 and 6159 have been opened for the proposed functionalities.
Tell you if you have any
thought.
By instruction, it's actually more for the testing. Maybe I will just
follow how the other functions are tested.
By the way, I am at UC Berkeley leading an open source group
Hi,
I found out there is not a function for extruding triangulation by exact
position of cell vertices along z-axis. So I wrote a piece of code by
modifying
GridGenerator::extrude_triangulation.
The attachment is an example of what it does.
Did for my own needs. Just wonder if I can
Daniel,
Thanks for confirming this.
Yep, I read that after getting error. Also, I was wrong that 3D can be done
in the way I thought before. Actually the same thing has to be done as 2D
for repeated manifolds except we use cylinders along different axes with
the same direction.
Best,
The initial description might be misleading. What I tried to do is
repeatedly set manifolds for circles on X-Y plane. Now I use STL container
to contain different pointers of SphericalManifold instance and
correspondingly assign distinct manifold ids, it worked out. But it might
be a non-smart
Hi
I dealt with problem in both 2d and 3d that a domain with a lot of
circles/cylinders along z-axis.
In 3D, I use CylindricalManifold<3> with axis=2 for the fold type. Yet, I
just realize being stuck in 2D that axis=2 is not available for
CylindricalManifold<2> ( 0 or 1 cannot give me the
It turned out to be me mistakenly setting manifold using ID "2" which was
one of the boundary ID. After I changed it to something else (specifically,
33), everything works as expected.
在 2018年4月1日星期日 UTC-7下午7:06:47，Weixiong Zheng写道：
>
> Hi
>
> Sorry for the messy title. W
Hi
Sorry for the messy title. What I did:
1. Create a 2D triangulation
2. extrude it
3. refine it globally
Yet, I found that cells on opposite sides of the extruded triangulation do
not have the same shape after uniform refinement. I was just wondering how
this could happen. In my view, cells
Hi
Just a quick question: are there functions to measure mesh quality?
I didn't see anything in FAQ and only saw one old post without an answer.
Thanks in advance!
Weixiong
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For mailing list/forum options, see
he triangulation
> object. In that case, the triangulation would have let lose of the manifold
> object upon its destruction, and everything would have been fine.
>
> Best,
> Jean-Paul
>
>
> On 29 Mar 2018, at 08:14, Weixiong Zheng <zwxn...@gmail.com >
> wrot
before the triangulation
> object. In that case, the triangulation would have let lose of the manifold
> object upon its destruction, and everything would have been fine.
>
> Best,
> Jean-Paul
>
>
> On 29 Mar 2018, at 08:14, Weixiong Zheng <zwxn...@gmail.com >
n.
>
> Best,
> Jean-Paul
>
>
> On 28 Mar 2018, at 01:10, Weixiong Zheng <zwxn...@gmail.com >
> wrote:
>
> I put my non-smart solution here in case if there's no easy way of doing
> it in deal.II and someone else needs it.
>
> // The vector I want to out
the issue for you.
>
> I hope this helps.
>
> Best,
> Jean-Paul
>
> On 29 Mar 2018, at 07:13, Weixiong Zheng <zwxn...@gmail.com >
> wrote:
>
> I changed the strategy that I don't assign manifold first. I merge two
> triangulations. Then, I loop over ce
rised, all of your
> boundaries will have an indicator of 0. So try to use a manifold ID of,
> say, 1. I think that this should fix the issue for you.
>
> I hope this helps.
>
> Best,
> Jean-Paul
>
> On 29 Mar 2018, at 07:13, Weixiong Zheng <zwxn...@gmail.com >
> wr
fold ID of,
> say, 1. I think that this should fix the issue for you.
>
> I hope this helps.
>
> Best,
> Jean-Paul
>
> On 29 Mar 2018, at 07:13, Weixiong Zheng <zwxn...@gmail.com >
> wrote:
>
> I changed the strategy that I don't assign manifold first. I merge t
Nice catch! I forgot to mention it is bilinear. But thanks for all the
explanation.
在 2018年3月28日星期三 UTC-7下午12:42:27，Wolfgang Bangerth写道：
>
>
> > |
> > // The vector I want to output is the solution for vector-valued
> problem.
> > // I want to output the cell-average value for the 0th
(0.92<std::sqrt(x*x+y*y)<1.) {
cell->set_all_manifold_ids(0);
break;
}
}
}
tria.refine_global(2);
The result is super strange that the boundary is also exterior boundary is
also curved.
在 2018年3月28日星期三 UTC-7下午9:00:50，Weixiong Zheng写道：
>
> Hi,
>
>
. refine global.
Apperantly, the manifold setting is not working as what I initially
thought. Any ideas how to fix it?
在 2018年3月28日星期三 UTC-7下午9:00:50，Weixiong Zheng写道：
>
> Hi,
>
> I just started to try manifold and tria merging functionalities. My
> question comes from the prob
Hi,
I just started to try manifold and tria merging functionalities. My
question comes from the problem that I have to merge two curved
triangulations. When refining, how do I make sure the merged boundaries are
still curved?
I currently set manifold before merging triangulation but it seems
= avg;
}
}
}
If anyone has any smarter idea, please let me know and thanks in advance.
Weixiong
在 2018年3月27日星期二 UTC-7下午2:35:37，Weixiong Zheng写道：
>
> Hi
>
> I am trying to output an cell average solution for a code using DG
> bilinear element in 2D. Is there a trivial way to
Hi
I am trying to output an cell average solution for a code using DG bilinear
element in 2D. Is there a trivial way to project DG-1 to DG-0? Or is there
any function I can call to output the solution at some specfic points, say
the center point of the cell?
Thanks
--
The deal.II project is
-7下午2:47:46，Wolfgang Bangerth写道：
>
> On 07/06/2017 06:25 PM, Weixiong Zheng wrote:
> >
> > I suspect it would not be about the weak form directly. So, every time I
> give
> > an set of initial cells, I need to make sure total initial cell number
>
：
>
> On 02/06/2018 10:28 AM, Weixiong Zheng wrote:
> >
> > > #define SOURCE_DIR
> /Users/GrillCheese/UCB/Research/xtrans/tests/mesh
> >
> >
> > Thanks sir,
> >
> > I got confused a bit. So you meant even with quotes around it, the
在 2018年2月6日星期二 UTC-8上午8:33:43，Wolfgang Bangerth写道：
>
> On 02/05/2018 11:37 PM, Weixiong Zheng wrote:
> >
> > What I've tried is to
> > ADD_DEFINITION(-DSOURCE_DIR=${CMAKE_CURRENT_SOURCE_DIR}) in the
> > CMakeLists.txt in the test directory. I tried tesing SOU
Thanks, sir.
I'd try that.
Weixiong
在 2018年2月6日星期二 UTC-8上午8:33:43，Wolfgang Bangerth写道：
>
> On 02/05/2018 11:37 PM, Weixiong Zheng wrote:
> >
> > What I've tried is to
> > ADD_DEFINITION(-DSOURCE_DIR=${CMAKE_CURRENT_SOURCE_DIR}) in the
> > CMakeLists.txt in the
guys have in mind.
在 2018年2月5日星期一 UTC-8下午10:37:38，Weixiong Zheng写道：
>
> Thanks Matthias,
>
> What I've tried is to
> ADD_DEFINITION(-DSOURCE_DIR=${CMAKE_CURRENT_SOURCE_DIR}) in the
> CMakeLists.txt in the test directory. I tried tesing SOURCE_DIR in *.cc
> file like: std::cout
undeclared identifier 'xxx'"
where xxx can be GrillCheese, UCB, Research etc.
Anything obviously wrong to you?
Thanks,
Weixiong
在 2018年2月5日星期一 UTC-8下午9:25:22，Matthias Maier写道：
>
>
> On Mon, Feb 5, 2018, at 22:15 CST, Weixiong Zheng <zwxn...@gmail.com
> > wrote:
>
>
在 2018年2月5日星期一 UTC-8下午8:55:19，Wolfgang Bangerth写道：
>
> On 02/05/2018 09:15 PM, Weixiong Zheng wrote:
> >
> > I am trying to get unit test work for my project. It works until
> reaching the
> > point of reading input data. I tried to specify the directory us
Hello All,
I am trying to get unit test work for my project. It works until reaching
the point of reading input data. I tried to specify the directory using
getcwd() though it didn't work with ctest. I noticed there was another user
having the same issue and the resolution was to use
Appreciated. I'll try this idea out.
Sent from my iPhone
> On Jul 7, 2017, at 16:47, Wolfgang Bangerth <bange...@colostate.edu> wrote:
>
>> On 07/06/2017 06:25 PM, Weixiong Zheng wrote:
>> I suspect it would not be about the weak form directly. So, every time I
>>
四 UTC-7上午8:26:06，Wolfgang Bangerth写道：
>
> On 07/06/2017 09:02 AM, Weixiong Zheng wrote:
> > Both are generated with subdivided hyper rectangle with same reps and
> diagonals.
>
> And no adaptive refinement?
>
> In that case, the solution *should* be the same, ass
Both are generated with subdivided hyper rectangle with same reps and diagonals.
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道：
>
> On 07/02/2017 02:40 PM, Weixiong Zheng wrote:
> >
> > The same thing happens to my function setting material ID, which takes
> the
> > same arguments in. Do you have any idea what's happening or what I can
> provide
> > to help diagnose the problem?
>
Dear all,
Couldn't find what I want in previous posts, so I post the problem here: I
pass my triangulation to a function in my mesh generating class (by
reference) and want to set the boundary ID and material IDs. My
triangulation:
parallel::distributed::Triangulation triangulation;
How I
在 2017年6月14日星期三 UTC-7下午5:44:37，Wolfgang Bangerth写道：
>
> On 06/13/2017 06:16 PM, Weixiong Zheng wrote:
> > |
> >
> > |
> >
> > As the problem is a scalar problem, fv.shape_value and shape_grad work
> as they
> > are supposed to, but not the
Felix,
Would you take a look at if [1] is what you want to have?
[1]:
https://www.dealii.org/8.4.0/doxygen/deal.II/classFEValuesBase.html#a665ab681011424cb1b0ba11c4155a121
Best,
Weixiong
在 2017年6月13日星期二 UTC-7上午9:35:09，Felix Lorenz写道：
>
>
> Hi everyone,
>
> I want to compute the transformation
Thanks, Daniel,
I used FESystem to wrap the scalar FiniteElement and the FE_Nothing
together. Here are the hp-relevant variables:
FESystem fe_continuous;
FESystem fe_discontinuous;
hp::FECollection fe_c;
hp::QCollection q_c;
hp::QCollection q_face_c;
This is how I do initialization
:54:50 UTC+2 schrieb Weixiong Zheng:
>>
>> Hi all,
>>
>> I am developing something based on petsc solvers and preconditioners. We
>> actually expect to invoke user-requested solvers and preconditioners from
>> the input file.
>>
>> I saw se
下午3:25:13，Weixiong Zheng写道：
>
> Dear all,
>
> I am writing code using hp class. When accessing the solution as:
> /*fe_c and q_c are fe and q collections*/
> hp::FEValue hp_fv(fe_c,q_c,update_values | update_quadrature_points);
> for(cells)
> {
> const FEValues
Dear all,
I am writing code using hp class. When accessing the solution as:
/*fe_c and q_c are fe and q collections*/
hp::FEValue hp_fv(fe_c,q_c,update_values | update_quadrature_points);
for(cells)
{
const FEValues = hp_fv.get_present_fe_values();
std::vector
Hi all,
I am developing something based on petsc solvers and preconditioners. We
actually expect to invoke user-requested solvers and preconditioners from
the input file.
I saw selector classes for deal.II based solvers and preconditioners but
didn't find any for petsc wrappers.
I am
Daniel and Dr Bangerth,
Thanks for the help. I got it resolved with modifying the dsp.
That does be my misunderstanding, hahaha.
Best,
Weixiong
在 2017年6月7日星期三 UTC-7上午10:33:57，Wolfgang Bangerth写道：
>
> On 06/07/2017 11:14 AM, Weixiong Zheng wrote:
> >
> > I see your point. I
Daniel,
I see your point. I would double check later. The reason I didn't use
locally relevant dofs is I didn't design the code to do h-refinement so I
didn't see points using relevant dofs.
Thanks,
Weixiong
在 2017年6月7日星期三 UTC-7上午6:35:44，Daniel Arndt写道：
>
> Weixiong,
>
> [...]
>>
d_dofs_per_processor (),
mpi_communicator,
locally_owned_dofs);
在 2017年6月6日星期二 UTC-7下午12:07:18，Wolfgang Bangerth写道：
>
> On 06/06/2017 12:10 PM, Weixiong Zheng wrote:
> > It runs in serial. The error occurs when using multiple processors.
>
> And it
It runs in serial. The error occurs when using multiple processors.
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在 2017年6月6日星期二 UTC-7上午2:13:28，Weixiong Zheng写道：
>
> Dear All,
>
> I am doing a radiation transport problem, which has multiple individual
> equations (number determined by the number of directions we input). As the
> number of directions is arbitrary, I put the sparsemat
Dear All,
I am doing a radiation transport problem, which has multiple individual
equations (number determined by the number of directions we input). As the
number of directions is arbitrary, I put the sparsematries are contained in
std::vectors as raw pointers (using LA namespace to stand for
All right, those work for me. Thanks!
Best,
Weixiong
在 2017年5月9日星期二 UTC-7下午6:48:05，Wolfgang Bangerth写道：
>
> On 05/09/2017 05:59 PM, Weixiong Zheng wrote:
> >
> > I got bothered a bit about the problem: the existence of some parameters
> > depends on the other paramet
Hi,
Don't know if this is relevant but I cannot find an answer from the
previous posts.
I got bothered a bit about the problem: the existence of some parameters
depends on the other parameters defining the problem. what I am doing now
is that I have two methods called: declare_parameter(prm)
s::MPI::sum(),
> max(), ...
> - you can always use MPI directly
> - If you have parallel vectors you can use things functions like norms
> that will do the reduction
>
> On Thu, May 4, 2017 at 4:29 PM, Weixiong Zheng <zwxn...@gmail.com
> > wrote:
> > Hi
> >
I will try after CSE17.
Best,
Weixiong
在 2017年2月27日星期一 UTC-5下午9:12:44，Wolfgang Bangerth写道：
>
> On 02/27/2017 12:24 PM, Weixiong Zheng wrote:
> > Dear all,
> >
> > Might be a trivial questions to you guys. I get a scalar problem using
> hp
> > class. When I
Dear all,
Might be a trivial questions to you guys. I get a scalar problem using hp
class. When I tried to output the results using
std::vector solution_names;
solution_names.push_back ("phi");
std::vector
data_component_interpretation(1,
Sir,
Just recalled I asked this before. So I put what I have tried here.
在 2015年10月1日星期四 UTC-5下午10:58:40，Wolfgang Bangerth写道：
>
> On 10/01/2015 10:52 PM, Weixiong Zheng wrote:
> > I tried to understand what you said and looked at step-9. So what you
> suggest is:
>
All right, I will try and come back if something's wrong. Thanks, sir.
在 2017年1月5日星期四 UTC-6下午9:08:56，Wolfgang Bangerth写道：
>
> On 01/05/2017 08:07 PM, Weixiong Zheng wrote:
> >
> > I am coding up a code such that DG is used in one subdomain, while CG is
> used
> &
Dear all,
I am coding up a code such that DG is used in one subdomain, while CG is
used in all other subdomains. The implementation is with hp::FECollection
class. As the CG-subdomains are discontiguous, i.e. they are spatially
disconnected, can I still use only one FE_Q for all disconnected
Bruno,
Yeah, I noticed an old discussion with the same problem and solved it.
Thanks,
Weixiong
在 2016年9月16日星期五 UTC-5上午10:42:30，Bruno Turcksin写道：
>
> Weixong,
>
> On Friday, September 16, 2016 at 11:35:09 AM UTC-4, Weixiong Zheng wrote:
>>
>> When running the progr
Dear all,
I just tried to modify step-3 to 1D. The changes are minor.
The equation is changed to be with a small reaction.
The mesh is generated with subdivided_hyper_cube (triangulation, 50, 0,
10); I changed all the <2>, the dimension, to <1>.
When running the program, the solution is zero
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