The Control File

The MODEL and the CONTROL_INPUT blocks described above are put into a single file called the control file, which is finished with a \end{FILE} command. An example of a full control file that meshes a model with a circular outer boundary and two inner circular boundaries, and writes out a plot file with spectral element resolution, is shown below. There is also a template control file in the Examples directory.

Just some notes:

1. Blocks do not have to be specified in any order (e.g. the MODEL could come first before the CONTROL_INPUT. INNER_BOUNDARIES could come before OUTER_BOUNDARY. Blocks must be defined within their appropriate block however, e.g. OUTER_BOUNDARY can only be defined in a MODEL block.
2. Keywords within a block can be specified in any order. The only ordering that is important is that within a CHAIN, the curves must be specified in order, counter-clockwise.
3. Spaces in keywords are significant, but not in any other contexts. For instance equals signs are aligned only for visual formatting.
4. Blank lines or lines starting with % are ignored.

---

\begin{CONTROL_INPUT}

   \begin{RUN_PARAMETERS}
      mesh file name         = Circles3Mesh.mesh
      plot file name         = Circles3Plot.tec
      statistics file name   = Circles3Stats.txt
      mesh file format       = ISM
      polynomial order       = 6
      plot file format       = sem
   \end{RUN_PARAMETERS}

   \begin{BACKGROUND_GRID}
     background grid size = [4.0,4.0]
   \end{BACKGROUND_GRID}

   \begin{SPRING_SMOOTHER}
     smoothing type       = LinearAndCrossbarSpring
     number of iterations = 20
   \end{SPRING_SMOOTHER}

\end{CONTROL_INPUT}

\begin{MODEL}

    \begin{OUTER_BOUNDARY}
        \begin{PARAMETRIC_EQUATION_CURVE}
            name = outer
            xEqn = x(t) = 14.0*cos(2*pi*t)
            yEqn = y(t) = 14.0*sin(2*pi*t)
            zEqn = z(t) = 0.0
        \end{PARAMETRIC_EQUATION_CURVE}
    \end{OUTER_BOUNDARY}

    \begin{INNER_BOUNDARIES}

        \begin{CHAIN}
            name = Boundary 1
            \begin{PARAMETRIC_EQUATION_CURVE}
                    name = Circle1
                    xEqn = f(t) = -10.25 + 0.2*cos(2*pi*t)
                    yEqn = f(t) = 3.0 + 0.2*sin(2*pi*t)
                    zEqn = z(t) = 0.0
            \end{PARAMETRIC_EQUATION_CURVE}
        \end{CHAIN}

        \begin{CHAIN}
            name = Boundary 2
           \begin{PARAMETRIC_EQUATION_CURVE}
                name = Circle2
                xEqn = f(t) = -5.1 + 1.0*cos(2*pi*t)
                yEqn = f(t) = 1.0*sin(2*pi*t) - 4.1
                zEqn = z(t) = 0.0
            \end{PARAMETRIC_EQUATION_CURVE}
        \end{CHAIN}

        \begin{CHAIN}
            name = Boundary 3
            \begin{PARAMETRIC_EQUATION_CURVE}
                name = Circle3
                xEqn = f(t) = -12.0 + 0.5*cos(2*pi*t)
                yEqn = f(t) = 0.5*sin(2*pi*t) - 0.5
                zEqn = z(t) = 0.0
            \end{PARAMETRIC_EQUATION_CURVE}
        \end{CHAIN}
    \end{INNER_BOUNDARIES}
\end{MODEL}
\end{FILE}