[ConorMD]

Hi there,

I am encountering an MPI error when attempting to run an FSI model, coupling Openfoam with Calculix.

I have tried a variety of decomposition strategies.

Does anyone know what might be causing this error?

I do not encounter this error when running the CFD solver alone in parallel.

Thanks
Conor

PIMPLE: Converged in 5 iterations
ExecutionTime = 138.33 s  ClockTime = 138 s

---[preciceAdapter] [DEBUG] Writing coupling data...
---[preciceAdapter] [DEBUG] Advancing preCICE...
(2) 11:18:05 [impl::SolverInterfaceImpl]:1307 in mapReadData: Compute read mapping from mesh "Calculix_Mesh" to mesh "Fluid-Mesh-Nodes".
(2) 11:18:05 [mapping::NearestProjectionMapping]:134 in computeMapping: WARNING: 3D Mesh "Calculix_Mesh" does not contain triangles. Nearest projection mapping will map to primitives of lower dimension.
(1) 11:18:05 [impl::SolverInterfaceImpl]:1307 in mapReadData: Compute read mapping from mesh "Calculix_Mesh" to mesh "Fluid-Mesh-Nodes".
(0) 11:18:05 [impl::SolverInterfaceImpl]:1307 in mapReadData: Compute read mapping from mesh "Calculix_Mesh" to mesh "Fluid-Mesh-Nodes".
(1) 11:18:05 [mapping::NearestProjectionMapping]:134 in computeMapping: WARNING: 3D Mesh "Calculix_Mesh" does not contain triangles. Nearest projection mapping will map to primitives of lower dimension.
(0) 11:18:05 [mapping::NearestProjectionMapping]:134 in computeMapping: WARNING: 3D Mesh "Calculix_Mesh" does not contain triangles. Nearest projection mapping will map to primitives of lower dimension.
(2) 11:18:05 [mapping::NearestProjectionMapping]:210 in computeMapping: Mapping distance min:883.084 max:883.087 avg: 883.085 var: 9.58797e-07 cnt: 545
(2) 11:18:05 [impl::SolverInterfaceImpl]:378 in advance: it 2 of 4 | dt# 1 | t 0 of 15 | dt 0.0001 | max dt 0.0001 | ongoing yes | dt complete no | read-iteration-checkpoint | 
(0) 11:18:05 [mapping::NearestProjectionMapping]:210 in computeMapping: Mapping distance min:883.08 max:883.103 avg: 883.092 var: 3.08115e-05 cnt: 6106
(0) 11:18:05 [impl::SolverInterfaceImpl]:378 in advance: it 2 of 4 | dt# 1 | t 0 of 15 | dt 0.0001 | max dt 0.0001 | ongoing yes | dt complete no | read-iteration-checkpoint | 
---[preciceAdapter] [DEBUG] Reading a checkpoint...
---[preciceAdapter] [DEBUG] Reloaded time value t = 0.000000
---[preciceAdapter] [DEBUG] Moving mesh points to their previous locations...
(1) 11:18:05 [mapping::NearestProjectionMapping]:210 in computeMapping: Mapping distance min:883.079 max:883.104 avg: 883.089 var: 2.8458e-05 cnt: 14477
(1) 11:18:05 [impl::SolverInterfaceImpl]:378 in advance: it 2 of 4 | dt# 1 | t 0 of 15 | dt 0.0001 | max dt 0.0001 | ongoing yes | dt complete no | read-iteration-checkpoint | 
AMI: Creating addressing and weights between 2622 source faces and 2622 target faces
AMI: Patch source sum(weights) min/max/average = 0.999999999999996, 1, 1
AMI: Patch target sum(weights) min/max/average = 0.999999999999923, 1.00000000000005, 1
---[preciceAdapter] [DEBUG] Moved mesh points to their previous locations.
---[preciceAdapter] [DEBUG] Checkpoint was read. Time = 0.000000
---[preciceAdapter] [DEBUG] Reading coupling data...
---[preciceAdapter] [DEBUG] Adjusting the solver's timestep...
---[preciceAdapter] [DEBUG] The solver's timestep is the same as the coupling timestep.
forces foil1_forces write:
    sum of forces:
        pressure : (0 0 0)
        viscous  : (10.1662639064385 -3.61537727703529e-11 -8.42274018146461e-11)
        porous   : (0 0 0)
    sum of moments:
        pressure : (0 0 0)
        viscous  : (-1.05289660430678e-08 4.44774051343602 5.08313195340344)
        porous   : (0 0 0)

[orpc-cfd:11463] *** An error occurred in MPI_Recv
[orpc-cfd:11463] *** reported by process [1067515905,0]
[orpc-cfd:11463] *** on communicator MPI COMMUNICATOR 3 SPLIT FROM 0
[orpc-cfd:11463] *** MPI_ERR_TRUNCATE: message truncated
[orpc-cfd:11463] *** MPI_ERRORS_ARE_FATAL (processes in this communicator will now abort,
[orpc-cfd:11463] ***    and potentially your MPI job)

[HPE]

Hi,

- Have you issued any bug tickets in `precice`: https://github.com/precice/precice/issues . The error might be related to entities other than OF?
- Were you able to run the coupling with a single processor?