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Recently, when submitting calculations with OpenFOAM and SU2, the error message “Authorization required, but no authorization protocol specified” repeatedly appeared. Although the calculation was eventually completed by ignoring it, the constant error message made me feel uneasy.

I suspected that it was a problem with OpenMPI, and verified it with the following command:

mpirun -np 2 hostname

Sure enough, an error message appeared:

1. Compile cfmesh

The early compiled and installed OpenFOAM version of com, with the version number v2412, and there is no source code with cfmesh. According to the official documentation, you need to manually download the source code file of cfmesh:

cd $WM_PROJECT_DIR
git submodule update --init --recursive plugins/cfmesh

The following error occurs:

fatal: fatal: not a git repository (or any of the parent directories): .git

Okay, let’s try another approach. Download the source code directly through git to the specified folder, folder and URL path to view it .gitmodules document:

This paper uses different CFD solvers to verify the laminar flow problem. Verify the accuracy of each solver by listing the operating procedures and differences in the output results of different solvers.

1. Problem description

As shown in the figure below, a fixed-constant laminar flow model between two concentric cylinders is established. The flow is caused by the rotation of the inner cylinder at a constant angular velocity, while the outer cylinder remains stationary. Using periodic boundaries, only a portion of the basin needs to be modeled. The physical model and input data are shown in the following table.