# First Simulation

Now that you have compiled the code and have an executable, we will run a simple example that contains fluid, particles, and embedded boundaries. This particular example is particles flowing down a cylinder. First, edit `path/to/mfix/benchmarks/05-cyl-fluidbed/Size0001/inputs` so that `mfix.write_eb_surface = true` and `mfix.plot_int = 1`. Then, run the example with:

    >> <executable> path/to/mfix/benchmarks/05-cyl-fluidbed/Size0001/inputs

The code will generate plotfiles with prefix `plt*` and geometry files with prefix `eb*`. See Visualization for how to view this dataset.