Choosing the Physics Co-Simulation Coupling

You can configure various aspects of the co-simulation coupling including the total time (duration).

See Also
About Ports
Connecting 3D Physics Components with Interactions
  1. From the Execution section of the action bar, click Experiment Setup .
  2. In the Experiment duration field, enter the total time in seconds that the co-simulation will run.
  3. Choose the Algorithm to determine the coupling scheme and the sequence of data exchanges between the components.
    OptionDescription
    Jacobi An explicit coupling scheme in which the components are executed in parallel—all components solve at the same time. The solution fields exchanged by each component lags by one coupling step, making this the least robust coupling algorithm. This coupling algorithm should only be used for very weak physics coupling in which solution cost savings can be obtain by executing the solvers in parallel.
    Gauss-Seidel An explicit coupling scheme in which the components are executed in a sequential manner. Typically one component leads the other component, with one solution lag between the components. This coupling scheme is suitable for weakly coupled physics simulations using small coupling steps.
    Gauss-Seidel-Predictor An explicit coupling algorithm similar to Gauss-Seidel, with the exception that the lagging component might provide predictor fields for the next coupling step. This reduces the solution lag between the components when the solution is sufficiently smooth to provide accurate predicted values.
    GandC Specialized coupling algorithm for structure-to-structure coupling. Provides stable coupling by ensuring velocity compatibility at the co-simulation interface, and is solution cost-effective since the components are allowed to use their own time incrementation based on stability.
    Iterative Implicit iterative coupling scheme suitable for stronger physics coupling. The solutions are iterated at the coupling step to remove any lag between the components.
  4. Choose the Negotiation method to determine how the coupling step size is computed.
    OptionDescription
    ConstantDT Use a constant coupling step size throughout the co-simulation, independent of each component's stable time increment.
    Min Use the minimum of all components' preferred time increment size.
    Max Use the maximum of all components' preferred time increment size.
    Master Use the preferred time increment size of the component designated by the Lead actor.
  5. Choose the Lead actor component that will start executing first. This component will lead and the other components will lag.