How to get started with MOOSE platform - an example of how to run the official tutorial

This article only introduces how to run the official examples given by the MOOSE platform (Examples and Tutorials | MOOSE), how to install the MOOSE platform can refer to the official tutorial (Install MOOSE | MOOSE), this article is based on the Ubuntu 20.04 virtual machine of the windows10 system.

To run these examples, you can use the app you built yourself, or you can compile the app in the official example folder. In order to run through the examples as soon as possible, you can directly compile the app in the example folder here.

1. Switch the moose environment

First open Ubuntu, type

conda activate moose

If you haven't built the moose environment, you can refer to (Conda MOOSE Environment |MOOSE),

At this point the beginning of the command line base will be changed to moose

2. Compile the app

Take Ee01 as an example, it is recommended that you put the original file inCopy once in the same directory, switch the working directory to the copied folder ~\projects\moose\examples\ex01_inputfile_copy, and then run make -j 4 to compile the app in this directory, where the number after j is how many threads to compileMeaning, -j4 is 4 threads.

cd ~/projects/moose/examples/ex01_inputfile_copymake -j 4

The process of compilation

The compilation process is slow, just wait patiently for completion.

3. Running example

After the app is compiled, we can use the generated appname-opt file to run the corresponding executable file (name.i). Here we use the app:ex01-opt just compiled in the ex01_inputfile_copy directory to run ex01.i, enter the command

./ex01-opt -i ./ex01.i

Wait patiently for the results, the model information to be solved

Framework Information:MOOSE Version: git commit cddfe1453b on 2021-12-14LibMesh Version:PETSc Version: 3.15.1SLEPc Version: 3.15.1Current Time: Tue May 10 13:34:47 2022Executable Timestamp: Tue May 10 13:32:14 2022Parallelism:Num Processors: 1Num Threads: 1Mesh:Parallel Type: replicatedMesh Dimension: 3Spatial Dimension: 3Nodes: 3774Elems: 2476Num Subdomains: 1Nonlinear System:Num DOFs: 3774Num Local DOFs: 3774Variables: "diffused"Finite Element Types: "LAGRANGE"Approximation Orders: "FIRST"Execution Information:Executioner: SteadySolver Mode: Preconditioned JFNK

The process of solving, residual output

4. Viewing results

In this example, the final output file is ex01_out.e, in Exodus II format, which can be used with Paraview (Download | ParaView) view, or use the Peacock that comes with the Moose platform (Peacock | MOOSE).

After using Paraview to open, the first step is to check the variable name to be viewed in the Properties tab at the bottom left of the default interface, and the second step is to click the Apply button.

The third step is to select the displayed variables at the top of the interface. The fourth step is to display the type of solution domain (surface, mesh, or node, etc.), and for transient models, you can also adjust the time step.

The final result display:

5. Remarks

During the initial compilation, an error code occurred

MAKEFILE:11:***MISSING SEPARATOR.STOP.

Open the script file Makefile for viewing later, and find that it is blank. It should be caused by an operation error that deleted the content in the previous use process.

Solution: Open the GitHub repository of MOOSE official website, find the link of the damaged file, and use the GitHub file downloader (GitHub File Acceleration), download the appropriate file, and then replace the corrupted file.