An error occurs when I want to access the mesh information directly

Using preCICE
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1

I want a fluid solver coupled to a solid solver for the Immersed Boundary Method. According to the official suggestion, I want to use this subroutine “precicef_get_mesh_vertices_and_IDs()” to get the vertex coordinates of the solid mesh, but I can’t find him when compiling. I saw that this function is still in the experimental stage and may be changed later, but I am using the latest version of precice, who can tell me whether this function has changed?
what should I do ? Can everyone help me!

by
wufan

2

No error is reported for other precice’s subroutine used, but when using this function，I received an error “undefined reference to `precicef_get_mesh_vertices_and_ids_'”

3

I guess your selected capitalization is wrong.

This version should work

You can find out about such things on our doxygen page:

https://precice.org/doxygen/main/SolverInterfaceFortran_8hpp.html

I agree that having all caps IDs in this function name is inconsistent with the remaining API, we should probably change this part, thanks!

4

Very happy with your reply, but it is case insensitive in Fortran. At the same time, I also changed to lowercase, and also reported this error

5

This is my code

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image1055×1004 60.3 KB

and this is the error
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image1942×208 23.2 KB

6

Yes, you are right, the error message would also look different then. How did you install preCICE?

7

Thank you DavidSCN, I compiled and installed the source code on the supercomputing machine. The quickstart and Perpendicular flap in the tutorial can be run, and I can also successfully run the calculation examples in the provided Fortran binding.

8

Thank you David,Just now I compiled successfully, I don’t know where I modified, but it did succeed, thank you for your help. I also want to ask you a question, if I want to get the position of the solid mesh in the time loop, should I call the subroutine “precicef_get_mesh_vertices_and_IDs” in the time loop?

9

No, once before the time loop starts is sufficient, the meshes don’t change throughout the simulation.

10

so，what should I do if I want to get solid mesh when the solid mesh deformed in time loop？

11

I have a new problem, I set it up according to the tutorial, but when I use subrountine “precicef_get_mesh_id(SolidMeshName, SolidMeshID)”, I get such an error message "preCICE:ERROR: The given Mesh ID “12395504” is unknown to preCICE .” Solid solver I used rigid_body_solver.cpp in quickstart, and modified it. I released the solid code and configuration files
fluid solver:

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image1113×1008 67.8 KB

solid solver:
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image1018×1023 57.2 KB

precice-config.xml
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image850×1064 46 KB

error:

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image963×44 5.11 KB

12

I further pinned down the error on this line of code

CALL precicef_set_mesh_access_region(SolidMeshID, boundingBox)

The error is “The given Mesh ID XXXX is unknown to preCICE”
Even if I change the code to
CALL precicef_set_mesh_access_region(0, boundingBox)
still the same error.

13

I don’t know whether this command is necessary if I want to use “direct access to received meshes”.
When I comment out this line of code, initialization succeeds.

https://precice.org/couple-your-code-direct-access.html