# Configuring a Solid-Solid-Fluid CHT case in OpenFOAM **URL:** \ **Category:** Official adapters and tutorials\ **Tags:** openfoam, configuration, cht\ **Created:** [December 7, 2024, 1:28pm UTC](https://precice.discourse.group/t/configuring-a-solid-solid-fluid-cht-case-in-openfoam/2258 "2024-12-07T13:28:59Z")\ **Posts on this page:** 2\ **Page:** 1
**Author:** ![mr.junfu444](https://yyz2.discourse-cdn.com/free1/user_avatar/precice.discourse.group/mr.junfu444/32/2584_2.png) [@mr.junfu444](https://precice.discourse.group/u/mr.junfu444)\ **Post date:** [December 7, 2024, 1:29pm UTC](https://precice.discourse.group/t/configuring-a-solid-solid-fluid-cht-case-in-openfoam/2258/1 "2024-12-07T13:29:00Z")
- my system:Ubuntu 20.04.4 - preCICE:v2.4.0 - OpenFOAM:v2006 - OpenFOAM-adapter-v1.0.0 - participants: fuel(solid) - cladding(solid) - coolant(liquid) **I don’t know how to set the `0/T` folder type for the participant** _OpenFOAM:cladding:'0’folder:“T”_ ``` FoamFile { version 2.0; format ascii; class volScalarField; object T; } // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * // dimensions [0 0 0 1 0 0 0]; internalField uniform 700; boundaryField { fuelwall { type fixedGradient; gradient uniform 0; } claddinginlet { type zeroGradient; } claddingoutlet { type zeroGradient; } claddingwall { type fixedValue; value $internalField; } } // ************************************************************************* // ``` **log:** ``` xie@xie-Z790-D:~/OpenFOAM/xie-v2006/run/tlk/CHT-Nuclear-couplling/222-fixgradient/cladding-openfoam$ mpirun -np 2 laplacianFoam -parallel |tee log /*---------------------------------------------------------------------------*\ | ========= | | | \\ / F ield | OpenFOAM: The Open Source CFD Toolbox | | \\ / O peration | Version: v2006 | | \\ / A nd | Website: www.openfoam.com | | \\/ M anipulation | | \*---------------------------------------------------------------------------*/ Build : v2006 OPENFOAM=2006 Arch : "LSB;label=32;scalar=64" Exec : laplacianFoam -parallel Date : Dec 07 2024 Time : 15:33:20 Host : xie-Z790-D PID : 837252 I/O : uncollated Case : /home/xie/OpenFOAM/xie-v2006/run/tlk/CHT-Nuclear-couplling/222-fixgradient/cladding-openfoam nProcs : 2 Hosts : ( (xie-Z790-D 2) ) Pstream initialized with: floatTransfer : 0 nProcsSimpleSum : 0 commsType : nonBlocking polling iterations : 0 trapFpe: Floating point exception trapping enabled (FOAM_SIGFPE). fileModificationChecking : Monitoring run-time modified files using timeStampMaster (fileModificationSkew 5, maxFileModificationPolls 20) allowSystemOperations : Allowing user-supplied system call operations Create time Create mesh for time = 0 SIMPLE: no convergence criteria found. Calculations will run for 0.3 steps. Reading field T Reading diffusivity DT No finite volume options present Calculating temperature distribution ---[preciceAdapter] Loaded the OpenFOAM-preCICE adapter v1.0.0. ---[preciceAdapter] Reading preciceDict... ---[precice] This is preCICE version 2.4.0 ---[precice] Revision info: no-info [Git failed/Not a repository] ---[precice] Build type: Release (without debug log) ---[precice] Configuring preCICE with configuration "../precice-config.xml" ---[precice] I am participant "cladding" ---[precice] Connecting Primary rank to 1 SecondaryRanks ---[precice] Setting up primary communication to coupling partner/s ---[precice] Primary ranks are connected ---[precice] Setting up preliminary secondary communication to coupling partner/s ---[precice] Prepare partition for mesh cladding-to-fuel-Mesh ---[precice] Prepare partition for mesh cladding-to-liquid-Mesh ---[precice] Gather mesh cladding-to-liquid-Mesh ---[precice] Send global mesh cladding-to-liquid-Mesh ---[precice] Receive global mesh fuel-Mesh ---[precice] Receive global mesh liquid-Mesh ---[precice] Broadcast mesh fuel-Mesh ---[precice] Filter mesh fuel-Mesh by bounding box on secondary ranks ---[precice] Mapping distance min:7.83971e-06 max:0.000249152 avg: 0.000126059 var: 5.17308e-09 cnt: 5040 ---[precice] Filter mesh fuel-Mesh by mappings ---[precice] Feedback distribution for mesh fuel-Mesh ---[precice] Broadcast mesh liquid-Mesh ---[precice] Filter mesh liquid-Mesh by bounding box on secondary ranks ---[precice] Mapping distance min:6.01013e-06 max:0.000249098 avg: 0.000125419 var: 5.11197e-09 cnt: 6280 ---[precice] Filter mesh liquid-Mesh by mappings ---[precice] Feedback distribution for mesh liquid-Mesh ---[precice] Setting up secondary communication to coupling partner/s ---[precice] Secondary ranks are connected ---[precice] liquid: iteration: 1, time-window: 1, time: 0 of 1, time-window-size: 0.0001, max-timestep-length: 0.0001, ongoing: yes, time-window-complete: no, write-initial-data fuel: iteration: 1, time-window: 1, time: 0 of 1, time-window-size: 0.0001, max-timestep-length: 0.0001, ongoing: yes, time-window-complete: no, --> FOAM Warning : From void adapterInfo(std::string, std::string) in file Utilities.C at line 50 Error (deferred - will exit later) in the preCICE adapter: Attempt to cast type fixedGradient to type fixedValue Time = 0.0001 DICPCG: Solving for T, Initial residual = 0.595024, Final residual = 8.40796e-07, No Iterations 37 DICPCG: Solving for T, Initial residual = 0.537021, Final residual = 7.1532e-07, No Iterations 36 DICPCG: Solving for T, Initial residual = 0.521095, Final residual = 7.09068e-07, No Iterations 36 ExecutionTime = 0.35 s ClockTime = 51 s [0] [0] [0] --> FOAM FATAL ERROR: [0] [1] [1] [1] --> FOAM FATAL ERROR: [1] Error in the preCICE adapter: There was a problem while configuring the adapter. See the log for details. [1] [1] [1] From void adapterInfo(std::string, std::string) [1] in file Utilities.C at line 32Error in the preCICE adapter: There was a problem while configuring the adapter. See the log for details. [0] [0] [0] From void adapterInfo(std::string, std::string) [0] in file Utilities.C at line 32. [0] FOAM parallel run exiting [0] . [1] FOAM parallel run exiting [1] -------------------------------------------------------------------------- MPI_ABORT was invoked on rank 0 in communicator MPI_COMM_WORLD with errorcode 1. NOTE: invoking MPI_ABORT causes Open MPI to kill all MPI processes. You may or may not see output from other processes, depending on exactly when Open MPI kills them. -------------------------------------------------------------------------- [xie-Z790-D:837247] 1 more process has sent help message help-mpi-api.txt / mpi-abort ``` ![屏幕截图 2024-12-07 213434](https://global.discourse-cdn.com/free1/uploads/precice/original/2X/2/204cd1abb8aae7d1c436b37846c9df66df4b8922.png) ![屏幕截图 2024-12-07 213449](https://global.discourse-cdn.com/free1/uploads/precice/original/2X/e/e0e176b8fc3e1b40bc31a8c4b61667e8bc2ab8e6.png) ![屏幕截图 2024-12-07 213502](https://global.discourse-cdn.com/free1/uploads/precice/original/2X/a/ad84b53a2f4b791492ab80fad01bbd5bb2932d82.png) ---
**Author:** ![Makis](https://yyz2.discourse-cdn.com/free1/user_avatar/precice.discourse.group/makis/32/25_2.png) [@Makis](https://precice.discourse.group/u/Makis)\ **Post date:** [March 21, 2025, 6:54pm UTC](https://precice.discourse.group/t/configuring-a-solid-solid-fluid-cht-case-in-openfoam/2258/2 "2025-03-21T18:54:58Z")
@mr.junfu444 I edited your topic to make it more easily readable: - I used backtickts (not single quotes) to format code snippets (see [Extended Syntax | Markdown Guide](https://www.markdownguide.org/extended-syntax/#fenced-code-blocks)) - I gave it a shorter, more descriptive title Did you make any progress on this issue in the meantime? In general, the configuration is described in the OpenFOAM adapter documentation: > **[Configure the OpenFOAM adapter](https://precice.org/adapter-openfoam-config.html#cht)** > > Write a system/preciceDict, set compatible boundary conditions, and activate the adapter in your system/controlDict. For reading temperature, you define a `fixedValue`. For reading heat flux, you define a `fixedGradient`. In your case, the cladding participant has two interfaces: one to the fuel, and one to the coolant. For this reason, you need to define two coupling meshes. See how we define something very similar in this tutorial: > **[Heat exchanger (simplified)](https://precice.org/tutorials-heat-exchanger-simplified.html)** > > This tutorial describes how to run a conjugate heat transfer simulation with three participants, with CalculiX as solid solver and Dirichlet-Neumann coupling.