Defining Mesh Motion Equation Controls

You can define controls to fine-tune the mesh motion equation solver.

Important: These controls are intended for expert users.

Before you begin:
  • Define a transient flow step. For more information, see Defining a Transient Flow Step.
  • Expand the Mesh motion equation controls section of your step.
See Also
About Mesh Motion Equation Controls
  1. From the Stiffness type options, select one of the following:
    OptionDescription
    Inverse Distance Assigns a higher stiffness to the elements close to the moving boundaries. If a moving boundary has not been applied, the app assigns uniform stiffness to those elements.

    When you choose to define the stiffness type using this option, you can also specify the Stiffness variation type as a Ratio or a Value of distance.
    Inverse Volume Assigns higher relative stiffness to the smallest elements in the mesh.
    Uniform Assigns a uniform stiffness to the whole computational domain.
  2. If you selected Inverse Distance or Inverse Volume, specify the following:
    1. Enter a value for the Stiffness scale, which is the ratio between the stiffness of the most rigid cell and the stiffness of the most flexible cell.
    2. Enter a value for the Stiffness power, which determines the order of variation of the stiffness.
  3. Enter a value for the Iteration limit, which is the maximum number of iterations for the equation solver.
  4. Enter a value for the Convergence limit, which is the point at which the iterative solver stops.

    The iterative solver stops when the relative residual norm of the system of equations and the relative correction of the solution norm fall below this convergence limit.

  5. Select Solve from undeformed coordinates to compute the new mesh from the original undeformed coordinates.