date:20220908

Re: [deal.II] Issue linking GMSH when installing & building dealii 9.4

2022-09-08 Thread Matthew Rich

Thanks for the reply.  I tried building from source a couple times and no
luck. I see tetgen and netgen in the cmake output but not  blas

Anyone do this recently? I have LAPACK debian package but that does not
seem to do the job. I think this is my issue is BLAS is missing but not
sure how to rectify.


*cmake output  for GMSH*
cmake -DENABLE_BUILD_DYNAMIC=1 -DENABLE_BUILD_SHARED=1 -DENABLE_MUMPS=1
-ENABLE_NUMPY=1 -DENABLE_PETSC4PY=1 -DENABLE_OCC_TBB=1 -DENABLE_OPENACC=1
-DENABLE_PETSC=1 -DENABLE_REVOROPT=1 -VERBOSE=1 ../
-- Found 64Bit
-- Found OpenMP
-- Found OpenACC_C: -fopenacc
-- Found OpenACC_CXX: -fopenacc
-- Found OpenACC
-- Found Eigen[contrib]
-- Found Mesh
-- Found Solver
-- Found Post
-- Found Plugins
-- Found Parser
CMake Warning (dev) at /usr/share/cmake-3.18/Modules/FindOpenGL.cmake:305
(message):
  Policy CMP0072 is not set: FindOpenGL prefers GLVND by default when
  available.  Run "cmake --help-policy CMP0072" for policy details.  Use the
  cmake_policy command to set the policy and suppress this warning.

  FindOpenGL found both a legacy GL library:

OPENGL_gl_LIBRARY: /usr/lib/x86_64-linux-gnu/libGL.so

  and GLVND libraries for OpenGL and GLX:

OPENGL_opengl_LIBRARY: /usr/lib/x86_64-linux-gnu/libOpenGL.so
OPENGL_glx_LIBRARY: /usr/lib/x86_64-linux-gnu/libGLX.so

  OpenGL_GL_PREFERENCE has not been set to "GLVND" or "LEGACY", so for
  compatibility with CMake 3.10 and below the legacy GL library will be
used.
Call Stack (most recent call first):
  /usr/share/cmake-3.18/Modules/FindFLTK.cmake:83 (find_package)
  CMakeLists.txt:633 (find_package)
This warning is for project developers.  Use -Wno-dev to suppress it.

-- Could NOT find FLTK (missing: FLTK_LIBRARIES)
-- Found ONELAB
-- Found ONELABMetamodel
-- Found ANN[contrib]
-- Found ALGLIB[contrib]
-- Found DIntegration
-- Found Kbipack
-- GMP not found: Kbipack uses long int
-- Found MathEx[contrib]
-- Found Metis[contrib]
-- Found TetGen/BR
-- Found Voro++[contrib]
-- Found OptHom
-- Found DomHex
-- Found QuadTri
-- Found Blossom
-- Found Netgen
-- Found Bamg
-- Found Hxt
-- Found QuadMeshingTools
-- Found WinslowUntangler
-- Found Gmm[contrib]
-- Found PETSc
-- Found OpenCASCADE version 7.5.1 in /usr/include/opencascade
-- Found OpenCASCADE-CAF
-- Found OpenCASCADE
-- Found Dlopen
-- Found LinuxJoystick
-- Found Revoropt
--
-- Gmsh 4.10.5 has been configured for Linux64-sdk
--
--  * Build options: 64Bit ALGLIB[contrib] ANN[contrib] Bamg Blossom
DIntegration Dlopen DomHex Eigen[contrib] Gmm[contrib] Hxt Kbipack
LinuxJoystick MathEx[contrib] Mesh Metis[contrib] Netgen ONELAB
ONELABMetamodel OpenACC OpenCASCADE OpenCASCADE-CAF OpenMP OptHom PETSc
Parser Plugins Post QuadMeshingTools QuadTri Revoropt Solver TetGen/BR
Voro++[contrib] WinslowUntangler
--  * Build type: RelWithDebInfo
--  * C compiler: /usr/bin/cc
--  * C++ compiler: /usr/bin/c++
--  * Install prefix: /usr/local
--
-- Configuring done
-- Generating done
-- Build files have been written to: /home/mjrich/gmsh-4.10.5

On Thu, 8 Sept 2022 at 13:51, Daniel Arndt  wrote:

> Matthew,
>
> I don't know if the missing references are due to missing components in
> your gmsh installation (but I wouldn't be surprised).
> In any way, *"netgen, tetgen and blas support has to be enabled in Gmsh" *
> relates to CMake options when building gmsh from source, e.g.,
> https://gmsh.info/src/gmsh-4.10.5-source.tgz.
> I would try if building gmsh yourself with those dependencies/options
> resolves the issue.
>
> Best,
> Daniel
>
> On Thu, Sep 8, 2022 at 9:48 AM Matthew Rich  wrote:
>
>> Hi all,
>>
>> I was upgrading the 9.4 and I needed to include GMSH for a project I am
>> working on so I can use the API in my dealii code. I am getting the
>> following error despite getting the all clear from CMAKE. How can I fix
>> this , are there version limits on GMSH? I did notice this line*
>> "netgen, tetgen and blas support has to be enabled in Gmsh"  *How does
>> one ensure that? I do not see much in their github readme.
>>
>> *Some details- *
>> On a windows system running dealii in WSL2 under debian. I have built
>> gmsh from source and it is functional by itself, so I feel I did that part
>> right.  I have -DGMSH_DIR set to the root directory of my gmsh installation
>> so ~/gmsh-gmsh-4.10.5 cmake settings when I install dealii
>>
>> *make Error *
>> [ 75%] Linking CXX executable ../bin/step_3_mixed.debug
>> ../lib/libdeal_II.g.so.9.4.0: error: undefined reference to
>> 'gmsh::model::addPhysicalGroup(int, std::vector >
>> const&, int)'
>> ../lib/libdeal_II.g.so.9.4.0: error: undefined reference to
>> 'gmsh::model::mesh::removeDuplicateNodes()'
>> ../lib/libdeal_II.g.so.9.4.0: error: undefined reference to
>> 'gmsh::initialize(int, char**, bool)'
>> collect2: error: ld returned 1 exit status
>> make[2]: *** [examples/CMakeFiles/step_3_mixed.debug.dir/build.make:292:
>> bin/step_3_mixed.debug] Error 1
>> make[1]: *** [CMakeFiles/Makefile2:3926:
>> examples/CMakeFiles/step_3_mixed.debug.dir/al

Re: [deal.II] fe_interface_values but of a tensor quantity

2022-09-08 Thread Wolfgang Bangerth


On 9/8/22 04:40, Abbas wrote:


I want the average of (uu) which is = u1*u1/2 +u2*u2/2 but I don't know 
how to get it.


Do I understand right that u1 and u2 are vectors, and when you say
  u1 * u1
you mean the outer product of a vector with itself, forming a tensor?

Best
 W.

--

Wolfgang Bangerth  email: bange...@colostate.edu
   www: http://www.math.colostate.edu/~bangerth/

--
The deal.II project is located at http://www.dealii.org/
For mailing list/forum options, see 
https://groups.google.com/d/forum/dealii?hl=en
--- 
You received this message because you are subscribed to the Google Groups "deal.II User Group" group.

To unsubscribe from this group and stop receiving emails from it, send an email 
to dealii+unsubscr...@googlegroups.com.
To view this discussion on the web visit 
https://groups.google.com/d/msgid/dealii/eec5ebc3-016d-e891-b7d1-b868d83f3f2e%40colostate.edu.

Re: [deal.II] Issue linking GMSH when installing & building dealii 9.4

2022-09-08 Thread Daniel Arndt

Matthew,

I don't know if the missing references are due to missing components in
your gmsh installation (but I wouldn't be surprised).
In any way, *"netgen, tetgen and blas support has to be enabled in Gmsh" *
relates to CMake options when building gmsh from source, e.g.,
https://gmsh.info/src/gmsh-4.10.5-source.tgz.
I would try if building gmsh yourself with those dependencies/options
resolves the issue.

Best,
Daniel

On Thu, Sep 8, 2022 at 9:48 AM Matthew Rich  wrote:

> Hi all,
>
> I was upgrading the 9.4 and I needed to include GMSH for a project I am
> working on so I can use the API in my dealii code. I am getting the
> following error despite getting the all clear from CMAKE. How can I fix
> this , are there version limits on GMSH? I did notice this line* "netgen,
> tetgen and blas support has to be enabled in Gmsh"  *How does one ensure
> that? I do not see much in their github readme.
>
> *Some details- *
> On a windows system running dealii in WSL2 under debian. I have built gmsh
> from source and it is functional by itself, so I feel I did that part
> right.  I have -DGMSH_DIR set to the root directory of my gmsh installation
> so ~/gmsh-gmsh-4.10.5 cmake settings when I install dealii
>
> *make Error *
> [ 75%] Linking CXX executable ../bin/step_3_mixed.debug
> ../lib/libdeal_II.g.so.9.4.0: error: undefined reference to
> 'gmsh::model::addPhysicalGroup(int, std::vector >
> const&, int)'
> ../lib/libdeal_II.g.so.9.4.0: error: undefined reference to
> 'gmsh::model::mesh::removeDuplicateNodes()'
> ../lib/libdeal_II.g.so.9.4.0: error: undefined reference to
> 'gmsh::initialize(int, char**, bool)'
> collect2: error: ld returned 1 exit status
> make[2]: *** [examples/CMakeFiles/step_3_mixed.debug.dir/build.make:292:
> bin/step_3_mixed.debug] Error 1
> make[1]: *** [CMakeFiles/Makefile2:3926:
> examples/CMakeFiles/step_3_mixed.debug.dir/all] Error 2
> make: *** [Makefile:149: all] Error 2
>
> *CMAKE output *
>
> #  Configured Features (DEAL_II_ALLOW_BUNDLED = ON,
> DEAL_II_ALLOW_AUTODETECTION = ON):
> #  ( DEAL_II_WITH_64BIT_INDICES = OFF )
> #  ( DEAL_II_WITH_ADOLC = OFF )
> #  ( DEAL_II_WITH_ARBORX = OFF )
> #DEAL_II_WITH_ARPACK set up with external dependencies
> #DEAL_II_WITH_ASSIMP set up with external dependencies
> #DEAL_II_WITH_BOOST set up with external dependencies
> #  ( DEAL_II_WITH_CGAL = OFF )
> #DEAL_II_WITH_COMPLEX_VALUES = ON
> #  ( DEAL_II_WITH_CUDA = OFF )
> #  ( DEAL_II_WITH_GINKGO = OFF )
> #DEAL_II_WITH_GMSH set up with external dependencies
> #DEAL_II_WITH_GSL set up with external dependencies
> #DEAL_II_WITH_HDF5 set up with external dependencies
> #DEAL_II_WITH_KOKKOS set up with external dependencies
> #DEAL_II_WITH_LAPACK set up with external dependencies
> #DEAL_II_WITH_METIS set up with external dependencies
> #DEAL_II_WITH_MPI set up with external dependencies
> #DEAL_II_WITH_MUPARSER set up with external dependencies
> #DEAL_II_WITH_OPENCASCADE set up with external dependencies
> #DEAL_II_WITH_P4EST set up with external dependencies
> #DEAL_II_WITH_PETSC set up with external dependencies
> #DEAL_II_WITH_SCALAPACK set up with external dependencies
> #DEAL_II_WITH_SLEPC set up with external dependencies
> #  ( DEAL_II_WITH_SUNDIALS = OFF )
> #  ( DEAL_II_WITH_SYMENGINE = OFF )
> #DEAL_II_WITH_TBB set up with external dependencies
> #DEAL_II_WITH_TRILINOS set up with external dependencies
> #DEAL_II_WITH_UMFPACK set up with external dependencies
> #DEAL_II_WITH_ZLIB set up with external dependencies
> #
> #  Component configuration:
> #  ( DEAL_II_COMPONENT_DOCUMENTATION = OFF )
> #DEAL_II_COMPONENT_EXAMPLES
> #  ( DEAL_II_COMPONENT_PACKAGE = OFF )
> #  ( DEAL_II_COMPONENT_PYTHON_BINDINGS = OFF )
> #
> #  Detailed information (compiler flags, feature configuration) can be
> found in detailed.log
> #
> #  Run  $ make info  to print a help message with a list of top level
> targets
> #
> ###
> -- Configuring done
> -- Generating done
> -- Build files have been written to: /home/mjrich/dealii-9.4.0/build
>
>
> --
> The deal.II project is located at http://www.dealii.org/
> For mailing list/forum options, see
> https://groups.google.com/d/forum/dealii?hl=en
> ---
> You received this message because you are subscribed to the Google Groups
> "deal.II User Group" group.
> To unsubscribe from this group and stop receiving emails from it, send an
> email to dealii+unsubscr...@googlegroups.com.
> To view this discussion on the web visit
> https://groups.google.com/d/msgid/dealii/82a12172-3189-410c-9fbc-4e050b81dd2cn%40googlegroups.com
> 
> .
>

-- 
The deal.II project is located at http://www.dealii.org/
For mailing list/forum options

Re: [deal.II] compiling deal.ii 9.4 on wsl error

2022-09-08 Thread jim wo

Daniel
thank you very much，you are so kind，God bless you.
best
qiong

Daniel Arndt  于 2022年9月8日周四 21:41写道：

> Qiong,
>
> It's not sufficient to include deal.II's include files but you need to
> link the library target. Have a look at
> https://www.dealii.org/current/users/cmake_user.html.
>
> Best,
> Daniel
>
>
> On Wed, Sep 7, 2022 at 9:38 PM jim wo  wrote:
>
>> and at the same time, I write the codes and it comes "the
>> deal.II/grid/tria.h not found" I dont konw why
>> best
>> Qiong
>>
>>
>> 在2022年9月8日星期四 UTC+8 09:34:59 写道：
>>
>>> I created a new cmake project on wsl with vscode ,I write the
>>> INCLUDE_DIRETORIES with header file of dealii in the CMakeLists and then
>>> cmake project ,I am not sure if its going to work . But when I make it
>>> comes error as follow
>>> [image: 1662600815935.png]
>>>  best
>>> Qiong
>>> 在2022年9月8日星期四 UTC+8 09:23:08 写道：
>>>
 I did install MPI on wsl
 and I congfigure deal.ii with DEAL_II_WITH_PETSC = ON
 DEAL_II_WITH_P4EST = ON


 在2022年9月7日星期三 UTC+8 23:03:57 写道：

> Qiong,
>
> What CMake settings did you use to configure deal.II?
> Does your system indeed provide an MPI installation?
>
> Bets,
> Daniel
>
> On Wed, Sep 7, 2022 at 10:22 AM jim wo  wrote:
>
>> Hello,
>> I want to  develop my own project on wsl with deal.ii 9.4.  after
>> make I got this message:
>>
>> In file included from /home/wu/deal_II/include/deal.II/grid/tria.h:20,
>>  from /home/wu/cmakeQuickStart/main.cpp:23:
>> /home/wu/deal_II/include/deal.II/base/config.h:540:12: fatal error:
>> mpi.h: No such file or directory
>>   540 | #  include 
>>   |^~~
>> compilation terminated.
>> thanks for  your help
>>  Qiong
>>
>> --
>> The deal.II project is located at http://www.dealii.org/
>> For mailing list/forum options, see
>> https://groups.google.com/d/forum/dealii?hl=en
>> ---
>> You received this message because you are subscribed to the Google
>> Groups "deal.II User Group" group.
>> To unsubscribe from this group and stop receiving emails from it,
>> send an email to dealii+un...@googlegroups.com.
>> To view this discussion on the web visit
>> https://groups.google.com/d/msgid/dealii/c3b2d20c-923f-457f-b938-61ca4e13029fn%40googlegroups.com
>> 
>> .
>>
> --
>> The deal.II project is located at http://www.dealii.org/
>> For mailing list/forum options, see
>> https://groups.google.com/d/forum/dealii?hl=en
>> ---
>> You received this message because you are subscribed to the Google Groups
>> "deal.II User Group" group.
>> To unsubscribe from this group and stop receiving emails from it, send an
>> email to dealii+unsubscr...@googlegroups.com.
>> To view this discussion on the web visit
>> https://groups.google.com/d/msgid/dealii/9bbc2b6b-a3de-49d5-aab2-7f9ee31fc168n%40googlegroups.com
>> 
>> .
>>
> --
> The deal.II project is located at http://www.dealii.org/
> For mailing list/forum options, see
> https://groups.google.com/d/forum/dealii?hl=en
> ---
> You received this message because you are subscribed to a topic in the
> Google Groups "deal.II User Group" group.
> To unsubscribe from this topic, visit
> https://groups.google.com/d/topic/dealii/lX-r3fbwUd8/unsubscribe.
> To unsubscribe from this group and all its topics, send an email to
> dealii+unsubscr...@googlegroups.com.
> To view this discussion on the web visit
> https://groups.google.com/d/msgid/dealii/CAOYDWbJ0Dv44iiiZ1Yy857P876SDiR2KMdgw3j1b93v8Ea9YQg%40mail.gmail.com
> 
> .
>

-- 
The deal.II project is located at http://www.dealii.org/
For mailing list/forum options, see 
https://groups.google.com/d/forum/dealii?hl=en
--- 
You received this message because you are subscribed to the Google Groups 
"deal.II User Group" group.
To unsubscribe from this group and stop receiving emails from it, send an email 
to dealii+unsubscr...@googlegroups.com.
To view this discussion on the web visit 
https://groups.google.com/d/msgid/dealii/CAFigMZ_sF5A7msQSmz5ZpXBm0ykpdjK7%3D_5vDmpAjwfBDRX9_w%40mail.gmail.com.

[deal.II] Issue linking GMSH when installing & building dealii 9.4

2022-09-08 Thread Matthew Rich

Hi all, 

I was upgrading the 9.4 and I needed to include GMSH for a project I am 
working on so I can use the API in my dealii code. I am getting the 
following error despite getting the all clear from CMAKE. How can I fix 
this , are there version limits on GMSH? I did notice this line* "netgen, 
tetgen and blas support has to be enabled in Gmsh"  *How does one ensure 
that? I do not see much in their github readme. 

*Some details- *
On a windows system running dealii in WSL2 under debian. I have built gmsh 
from source and it is functional by itself, so I feel I did that part 
right.  I have -DGMSH_DIR set to the root directory of my gmsh installation 
so ~/gmsh-gmsh-4.10.5 cmake settings when I install dealii  

*make Error *
[ 75%] Linking CXX executable ../bin/step_3_mixed.debug
../lib/libdeal_II.g.so.9.4.0: error: undefined reference to 
'gmsh::model::addPhysicalGroup(int, std::vector > 
const&, int)'
../lib/libdeal_II.g.so.9.4.0: error: undefined reference to 
'gmsh::model::mesh::removeDuplicateNodes()'
../lib/libdeal_II.g.so.9.4.0: error: undefined reference to 
'gmsh::initialize(int, char**, bool)'
collect2: error: ld returned 1 exit status
make[2]: *** [examples/CMakeFiles/step_3_mixed.debug.dir/build.make:292: 
bin/step_3_mixed.debug] Error 1
make[1]: *** [CMakeFiles/Makefile2:3926: 
examples/CMakeFiles/step_3_mixed.debug.dir/all] Error 2
make: *** [Makefile:149: all] Error 2

*CMAKE output *

#  Configured Features (DEAL_II_ALLOW_BUNDLED = ON, 
DEAL_II_ALLOW_AUTODETECTION = ON):
#  ( DEAL_II_WITH_64BIT_INDICES = OFF )
#  ( DEAL_II_WITH_ADOLC = OFF )
#  ( DEAL_II_WITH_ARBORX = OFF )
#DEAL_II_WITH_ARPACK set up with external dependencies
#DEAL_II_WITH_ASSIMP set up with external dependencies
#DEAL_II_WITH_BOOST set up with external dependencies
#  ( DEAL_II_WITH_CGAL = OFF )
#DEAL_II_WITH_COMPLEX_VALUES = ON
#  ( DEAL_II_WITH_CUDA = OFF )
#  ( DEAL_II_WITH_GINKGO = OFF )
#DEAL_II_WITH_GMSH set up with external dependencies
#DEAL_II_WITH_GSL set up with external dependencies
#DEAL_II_WITH_HDF5 set up with external dependencies
#DEAL_II_WITH_KOKKOS set up with external dependencies
#DEAL_II_WITH_LAPACK set up with external dependencies
#DEAL_II_WITH_METIS set up with external dependencies
#DEAL_II_WITH_MPI set up with external dependencies
#DEAL_II_WITH_MUPARSER set up with external dependencies
#DEAL_II_WITH_OPENCASCADE set up with external dependencies
#DEAL_II_WITH_P4EST set up with external dependencies
#DEAL_II_WITH_PETSC set up with external dependencies
#DEAL_II_WITH_SCALAPACK set up with external dependencies
#DEAL_II_WITH_SLEPC set up with external dependencies
#  ( DEAL_II_WITH_SUNDIALS = OFF )
#  ( DEAL_II_WITH_SYMENGINE = OFF )
#DEAL_II_WITH_TBB set up with external dependencies
#DEAL_II_WITH_TRILINOS set up with external dependencies
#DEAL_II_WITH_UMFPACK set up with external dependencies
#DEAL_II_WITH_ZLIB set up with external dependencies
#
#  Component configuration:
#  ( DEAL_II_COMPONENT_DOCUMENTATION = OFF )
#DEAL_II_COMPONENT_EXAMPLES
#  ( DEAL_II_COMPONENT_PACKAGE = OFF )
#  ( DEAL_II_COMPONENT_PYTHON_BINDINGS = OFF )
#
#  Detailed information (compiler flags, feature configuration) can be 
found in detailed.log
#
#  Run  $ make info  to print a help message with a list of top level 
targets
#
###
-- Configuring done
-- Generating done
-- Build files have been written to: /home/mjrich/dealii-9.4.0/build


-- 
The deal.II project is located at http://www.dealii.org/
For mailing list/forum options, see 
https://groups.google.com/d/forum/dealii?hl=en
--- 
You received this message because you are subscribed to the Google Groups 
"deal.II User Group" group.
To unsubscribe from this group and stop receiving emails from it, send an email 
to dealii+unsubscr...@googlegroups.com.
To view this discussion on the web visit 
https://groups.google.com/d/msgid/dealii/82a12172-3189-410c-9fbc-4e050b81dd2cn%40googlegroups.com.

Re: [deal.II] compiling deal.ii 9.4 on wsl error

2022-09-08 Thread Daniel Arndt

Qiong,

It's not sufficient to include deal.II's include files but you need to link
the library target. Have a look at
https://www.dealii.org/current/users/cmake_user.html.

Best,
Daniel


On Wed, Sep 7, 2022 at 9:38 PM jim wo  wrote:

> and at the same time, I write the codes and it comes "the
> deal.II/grid/tria.h not found" I dont konw why
> best
> Qiong
>
>
> 在2022年9月8日星期四 UTC+8 09:34:59 写道：
>
>> I created a new cmake project on wsl with vscode ,I write the
>> INCLUDE_DIRETORIES with header file of dealii in the CMakeLists and then
>> cmake project ,I am not sure if its going to work . But when I make it
>> comes error as follow
>> [image: 1662600815935.png]
>>  best
>> Qiong
>> 在2022年9月8日星期四 UTC+8 09:23:08 写道：
>>
>>> I did install MPI on wsl
>>> and I congfigure deal.ii with DEAL_II_WITH_PETSC = ON
>>> DEAL_II_WITH_P4EST = ON
>>>
>>>
>>> 在2022年9月7日星期三 UTC+8 23:03:57 写道：
>>>
 Qiong,

 What CMake settings did you use to configure deal.II?
 Does your system indeed provide an MPI installation?

 Bets,
 Daniel

 On Wed, Sep 7, 2022 at 10:22 AM jim wo  wrote:

> Hello,
> I want to  develop my own project on wsl with deal.ii 9.4.  after make
> I got this message:
>
> In file included from /home/wu/deal_II/include/deal.II/grid/tria.h:20,
>  from /home/wu/cmakeQuickStart/main.cpp:23:
> /home/wu/deal_II/include/deal.II/base/config.h:540:12: fatal error:
> mpi.h: No such file or directory
>   540 | #  include 
>   |^~~
> compilation terminated.
> thanks for  your help
>  Qiong
>
> --
> The deal.II project is located at http://www.dealii.org/
> For mailing list/forum options, see
> https://groups.google.com/d/forum/dealii?hl=en
> ---
> You received this message because you are subscribed to the Google
> Groups "deal.II User Group" group.
> To unsubscribe from this group and stop receiving emails from it, send
> an email to dealii+un...@googlegroups.com.
> To view this discussion on the web visit
> https://groups.google.com/d/msgid/dealii/c3b2d20c-923f-457f-b938-61ca4e13029fn%40googlegroups.com
> 
> .
>
 --
> The deal.II project is located at http://www.dealii.org/
> For mailing list/forum options, see
> https://groups.google.com/d/forum/dealii?hl=en
> ---
> You received this message because you are subscribed to the Google Groups
> "deal.II User Group" group.
> To unsubscribe from this group and stop receiving emails from it, send an
> email to dealii+unsubscr...@googlegroups.com.
> To view this discussion on the web visit
> https://groups.google.com/d/msgid/dealii/9bbc2b6b-a3de-49d5-aab2-7f9ee31fc168n%40googlegroups.com
> 
> .
>

-- 
The deal.II project is located at http://www.dealii.org/
For mailing list/forum options, see 
https://groups.google.com/d/forum/dealii?hl=en
--- 
You received this message because you are subscribed to the Google Groups 
"deal.II User Group" group.
To unsubscribe from this group and stop receiving emails from it, send an email 
to dealii+unsubscr...@googlegroups.com.
To view this discussion on the web visit 
https://groups.google.com/d/msgid/dealii/CAOYDWbJ0Dv44iiiZ1Yy857P876SDiR2KMdgw3j1b93v8Ea9YQg%40mail.gmail.com.

[deal.II] fe_interface_values but of a tensor quantity

2022-09-08 Thread Abbas

I am using DG elements and if I want to query the average of my vector 
solution across the interface I can do something like :
  std::vector> old_velocity_averages(n_q_points);
  
fe_iv[velocities].get_average_of_function_values(solution_np0,old_velocity_averages);
which gives me the average of u=u1/2+u2/2

I want the average of (uu) which is = u1*u1/2 +u2*u2/2 but I don't know how 
to get it. 
 
I am stuck and will take any hints. Should I inherit the fe_interface class 
and implement my own function?   

-- 
The deal.II project is located at http://www.dealii.org/
For mailing list/forum options, see 
https://groups.google.com/d/forum/dealii?hl=en
--- 
You received this message because you are subscribed to the Google Groups 
"deal.II User Group" group.
To unsubscribe from this group and stop receiving emails from it, send an email 
to dealii+unsubscr...@googlegroups.com.
To view this discussion on the web visit 
https://groups.google.com/d/msgid/dealii/c4a0a408-1d39-4819-b1d8-304f9ec17116n%40googlegroups.com.

Re: [deal.II] Issue linking GMSH when installing & building dealii 9.4

Re: [deal.II] fe_interface_values but of a tensor quantity

Re: [deal.II] Issue linking GMSH when installing & building dealii 9.4

Re: [deal.II] compiling deal.ii 9.4 on wsl error

[deal.II] Issue linking GMSH when installing & building dealii 9.4

Re: [deal.II] compiling deal.ii 9.4 on wsl error

[deal.II] fe_interface_values but of a tensor quantity

7 matches

Site Navigation

Mail list logo

Footer information