Partitioned heat conduction (G+Smo participant) #604

Crazy-Rich-Meghan · 2024-12-04T15:14:39Z

Summary: Partitioned heat conduction G+Smo (IsoGeometric Analysis) participant
NOTE: G+Smo adapter is a submodule of the G+Smo library, to run the tutorial you need to configure G+Smo main library.

Updated README.md file, which contains instructions on how to configure G+Smo library with preCICE adapter.
Added gismo-executable folder to contain the symbolic link for the G+Smo executable.

This PR is marked as a draft because the documentation for the G+Smo adapter requires updates.

uekerman · 2024-12-10T17:05:25Z

Let's first iterate on #603 and then here, OK?

MakisH · 2025-07-17T14:12:00Z

@Crazy-Rich-Meghan do you plan to continue this development? It seems to currently be in draft state. We are happy to help get it in a good state!

Crazy-Rich-Meghan · 2025-09-10T22:40:24Z

Hi everyone,

Sorry for the delay! I have updated the partitioned heat conduction example from our side, this version supports the direct mesh access feature. To run the benchmark you need to do the following:
1. Clone G+Smo
2. cmake .. -DCMAKE_BUILD_TYPE=Release -DGISMO_OPTIONAL="gsPreCICE"
3. cmake --build build --target partitioned-heat-conduction -j 8
4. Install this example systemwide make install partitioned-heat-conduction
5. Go to the neumann-gismo folder run the Neumann participant with the run script.
6. Go to the dirichlet-gismo folder run the Dirichlet participant with the run script.

Let me know if you get stuck somewhere!

MakisH · 2025-10-07T15:06:10Z

Hi @Crazy-Rich-Meghan,

thanks for the updates! I am now trying to build on my system, based on the stable branch (Commit ef4c754785cf4949d3a89b916eed807b74b97a9b, October 2).

I do get a building error, though (g++ (Ubuntu 12.3.0-1ubuntu1~22.04.2) 12.3.0):

[ 97%] Building CXX object optional/gsPreCICE/examples/CMakeFiles/partitioned-heat-conduction.dir/partitioned-heat-conduction.cpp.o
/home/gc/repos/misc/gismo/optional/gsPreCICE/examples/partitioned-heat-conduction.cpp: In function ‘int main(int, char**)’:
/home/gc/repos/misc/gismo/optional/gsPreCICE/examples/partitioned-heat-conduction.cpp:110:17: error: base operand of ‘->’ has non-pointer type ‘gismo::gsBasis<double>::domainIter’ {aka ‘gismo::gsDomainIteratorWrapper<double>’}
  110 |     for (; domIt->good(); domIt->next(), k++ )
      |                 ^~
/home/gc/repos/misc/gismo/optional/gsPreCICE/examples/partitioned-heat-conduction.cpp:110:32: error: base operand of ‘->’ has non-pointer type ‘gismo::gsBasis<double>::domainIter’ {aka ‘gismo::gsDomainIteratorWrapper<double>’}
  110 |     for (; domIt->good(); domIt->next(), k++ )
      |                                ^~
/home/gc/repos/misc/gismo/optional/gsPreCICE/examples/partitioned-heat-conduction.cpp:120:15: error: base operand of ‘->’ has non-pointer type ‘gismo::gsBasis<double>::domainIter’ {aka ‘gismo::gsDomainIteratorWrapper<double>’}
  120 |     for (domIt->reset(); domIt->good(); domIt->next(), k++ )
      |               ^~
/home/gc/repos/misc/gismo/optional/gsPreCICE/examples/partitioned-heat-conduction.cpp:120:31: error: base operand of ‘->’ has non-pointer type ‘gismo::gsBasis<double>::domainIter’ {aka ‘gismo::gsDomainIteratorWrapper<double>’}
  120 |     for (domIt->reset(); domIt->good(); domIt->next(), k++ )
      |                               ^~
/home/gc/repos/misc/gismo/optional/gsPreCICE/examples/partitioned-heat-conduction.cpp:120:46: error: base operand of ‘->’ has non-pointer type ‘gismo::gsBasis<double>::domainIter’ {aka ‘gismo::gsDomainIteratorWrapper<double>’}
  120 |     for (domIt->reset(); domIt->good(); domIt->next(), k++ )
      |                                              ^~
/home/gc/repos/misc/gismo/optional/gsPreCICE/examples/partitioned-heat-conduction.cpp:124:29: error: base operand of ‘->’ has non-pointer type ‘gismo::gsBasis<double>::domainIter’ {aka ‘gismo::gsDomainIteratorWrapper<double>’}
  124 |         QuRule->mapTo( domIt->lowerCorner(), domIt->upperCorner(),
      |                             ^~
/home/gc/repos/misc/gismo/optional/gsPreCICE/examples/partitioned-heat-conduction.cpp:124:51: error: base operand of ‘->’ has non-pointer type ‘gismo::gsBasis<double>::domainIter’ {aka ‘gismo::gsDomainIteratorWrapper<double>’}
  124 |         QuRule->mapTo( domIt->lowerCorner(), domIt->upperCorner(),
      |                                                   ^~
gmake[3]: *** [optional/gsPreCICE/examples/CMakeFiles/partitioned-heat-conduction.dir/build.make:76: optional/gsPreCICE/examples/CMakeFiles/partitioned-heat-conduction.dir/partitioned-heat-conduction.cpp.o] Error 1
gmake[2]: *** [CMakeFiles/Makefile2:1940: optional/gsPreCICE/examples/CMakeFiles/partitioned-heat-conduction.dir/all] Error 2
gmake[1]: *** [CMakeFiles/Makefile2:1947: optional/gsPreCICE/examples/CMakeFiles/partitioned-heat-conduction.dir/rule] Error 2
gmake: *** [Makefile:907: partitioned-heat-conduction] Error 2

By the way, I edited your instructions above to add a number next to the -j flag. Without a number, it will use as many threads as parallelizable build targets, which might fill the memory completely and make a system crash.

MakisH · 2025-10-07T15:08:50Z

partitioned-heat-conduction/dirichlet-gismo/clean.sh

+# Remove precice-profiling directory
+if [ -d "precice-profiling" ]; then
+    rm -rf precice-profiling
+    echo "Deleted 'precice-profiling' folder."
+fi
+
+# Remove precice-run directory
+if [ -d "../precice-run" ]; then
+    rm -rf ../precice-run
+    echo "Deleted 'precice-run' folder."
+fi


These should be handled by clean_precice_logs(), called by clean_gismo() (see https://github.com/precice/tutorials/blob/develop/tools/cleaning-tools.sh)

MakisH · 2025-10-07T15:10:07Z

partitioned-heat-conduction/dirichlet-gismo/clean.sh

+# Remove files ending with .pvd, .vts, .vtp, .log, and .txt
+for ext in pvd vts vtp log txt; do
+    find . -type f -name "*.$ext" -exec rm -f {} \;
+    echo "Deleted all *.$ext files."
+done


This is a bit too intrusive (especially for the .txt files). Better do a fine-grained extension of clean_gismo().

Same in the neumann-gismo directory.

partitioned-heat-conduction/README.md

MakisH · 2025-10-07T15:13:23Z

partitioned-heat-conduction/README.md

+The G+Smo-based version of the tutorial offers IsoGeometric Analysis discretization method. To run the example you need to follow the following steps:
+
+- Download G+Smo and Create a Build Folder
+```
+git clone [email protected]:gismo/gismo.git
+cd gismo
+mkdir build
+```
+ - Configure G+Smo 
+```
+cmake .. -DGISMO_OPTIONAL="<other submodules>;gsPreCICE"
+```
+- Build the Example
+```
+make partitioned-heat-conduction -j <number of threads to use>
+```
+- Link the compiled executable to the gismo-executable folder within the tutorial directory
+```
+cd <Your preCICE tutorial folder>/partitioned-heat-conduction/gismo-executable
+ln -sf <You G+Smo build folder>/bin/partitioned-heat-conduction ./gismo_executable`
+```
+- Open two terminals and run
+```
+ cd dirichlet-gismo
+ ./run.sh
+```
+
+```
+cd neumann-gismo
+./run.sh
+```


Could we move most of this content to the adapter documentation, and refer to that?

The path ./gismo_executable/gismo_executable is assumed by the run.sh, so it should probably be documented here. But we should better call that directory solver-gismo.

partitioned-heat-conduction/README.md

MakisH · 2025-10-07T15:17:46Z

partitioned-heat-conduction/images/tutorial-partitioned-heat-conduction-gismo.gif

Not yet referred to from the README.md. In principle, both FEniCS and G+Smo should give the same solution. If not, we should add the picture in the README.md together with a comment.

Co-authored-by: Gerasimos Chourdakis <[email protected]>

Crazy-Rich-Meghan · 2025-10-17T09:03:13Z

Hi @Crazy-Rich-Meghan,

thanks for the updates! I am now trying to build on my system, based on the stable branch (Commit ef4c754785cf4949d3a89b916eed807b74b97a9b, October 2).

I do get a building error, though (g++ (Ubuntu 12.3.0-1ubuntu1~22.04.2) 12.3.0):


[ 97%] Building CXX object optional/gsPreCICE/examples/CMakeFiles/partitioned-heat-conduction.dir/partitioned-heat-conduction.cpp.o

/home/gc/repos/misc/gismo/optional/gsPreCICE/examples/partitioned-heat-conduction.cpp: In function ‘int main(int, char**)’:

/home/gc/repos/misc/gismo/optional/gsPreCICE/examples/partitioned-heat-conduction.cpp:110:17: error: base operand of ‘->’ has non-pointer type ‘gismo::gsBasis<double>::domainIter’ {aka ‘gismo::gsDomainIteratorWrapper<double>’}

  110 |     for (; domIt->good(); domIt->next(), k++ )

      |                 ^~

/home/gc/repos/misc/gismo/optional/gsPreCICE/examples/partitioned-heat-conduction.cpp:110:32: error: base operand of ‘->’ has non-pointer type ‘gismo::gsBasis<double>::domainIter’ {aka ‘gismo::gsDomainIteratorWrapper<double>’}

  110 |     for (; domIt->good(); domIt->next(), k++ )

      |                                ^~

/home/gc/repos/misc/gismo/optional/gsPreCICE/examples/partitioned-heat-conduction.cpp:120:15: error: base operand of ‘->’ has non-pointer type ‘gismo::gsBasis<double>::domainIter’ {aka ‘gismo::gsDomainIteratorWrapper<double>’}

  120 |     for (domIt->reset(); domIt->good(); domIt->next(), k++ )

      |               ^~

/home/gc/repos/misc/gismo/optional/gsPreCICE/examples/partitioned-heat-conduction.cpp:120:31: error: base operand of ‘->’ has non-pointer type ‘gismo::gsBasis<double>::domainIter’ {aka ‘gismo::gsDomainIteratorWrapper<double>’}

  120 |     for (domIt->reset(); domIt->good(); domIt->next(), k++ )

      |                               ^~

/home/gc/repos/misc/gismo/optional/gsPreCICE/examples/partitioned-heat-conduction.cpp:120:46: error: base operand of ‘->’ has non-pointer type ‘gismo::gsBasis<double>::domainIter’ {aka ‘gismo::gsDomainIteratorWrapper<double>’}

  120 |     for (domIt->reset(); domIt->good(); domIt->next(), k++ )

      |                                              ^~

/home/gc/repos/misc/gismo/optional/gsPreCICE/examples/partitioned-heat-conduction.cpp:124:29: error: base operand of ‘->’ has non-pointer type ‘gismo::gsBasis<double>::domainIter’ {aka ‘gismo::gsDomainIteratorWrapper<double>’}

  124 |         QuRule->mapTo( domIt->lowerCorner(), domIt->upperCorner(),

      |                             ^~

/home/gc/repos/misc/gismo/optional/gsPreCICE/examples/partitioned-heat-conduction.cpp:124:51: error: base operand of ‘->’ has non-pointer type ‘gismo::gsBasis<double>::domainIter’ {aka ‘gismo::gsDomainIteratorWrapper<double>’}

  124 |         QuRule->mapTo( domIt->lowerCorner(), domIt->upperCorner(),

      |                                                   ^~

gmake[3]: *** [optional/gsPreCICE/examples/CMakeFiles/partitioned-heat-conduction.dir/build.make:76: optional/gsPreCICE/examples/CMakeFiles/partitioned-heat-conduction.dir/partitioned-heat-conduction.cpp.o] Error 1

gmake[2]: *** [CMakeFiles/Makefile2:1940: optional/gsPreCICE/examples/CMakeFiles/partitioned-heat-conduction.dir/all] Error 2

gmake[1]: *** [CMakeFiles/Makefile2:1947: optional/gsPreCICE/examples/CMakeFiles/partitioned-heat-conduction.dir/rule] Error 2

gmake: *** [Makefile:907: partitioned-heat-conduction] Error 2

By the way, I edited your instructions above to add a number next to the -j flag. Without a number, it will use as many threads as parallelizable build targets, which might fill the memory completely and make a system crash.

Hi @makis, have you pulled the main Gismo? We couldn't replicate the issue (on both MacOS and Ubuntu).

Crazy-Rich-Meghan and others added 4 commits December 4, 2024 15:29

G+Smo cpp file; run scripts; clean scripts

0af5285

Merge branch 'precice:develop' into partitioned-heat-conduction

ec7bbcb

Update README.md for G+Smo; rename files

b66de59

Fix README.md

5a0fd18

fsimonis requested a review from uekerman December 9, 2024 12:50

Merge branch 'precice:develop' into partitioned-heat-conduction

5c46bfc

Crazy-Rich-Meghan marked this pull request as ready for review September 10, 2025 22:21

Direct mesh access version for partitioned heat conduction

4b0ae69

MakisH reviewed Oct 7, 2025

View reviewed changes

Crazy-Rich-Meghan and others added 3 commits October 16, 2025 08:45

Merge branch 'precice:develop' into partitioned-heat-conduction

1df1cfc

Update partitioned-heat-conduction/README.md

2f62738

Co-authored-by: Gerasimos Chourdakis <[email protected]>

Update partitioned-heat-conduction/README.md

75fa072

Co-authored-by: Gerasimos Chourdakis <[email protected]>

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Partitioned heat conduction (G+Smo participant) #604

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