Community Computational Fluid Dynamics Discover What’s New in Fine Marine CFD

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AnneMarie CFD

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Discover What’s New in Fine Marine CFD

• 2 minute read

The newest version of Fine Marine offers critical enhancements that improve solver performances and sharpen the C-Wizard’s capabilities even further. Check out the highlights:

γ-ReθTransition Model and Extension for Crossflow Modeling

We have boosted our modeling capabilities for the transition from laminar to turbulent flow by including a new transition model called γ-Reθ, developed by Menter and Langtry (2012). While our current γ model in Fine Marine and the base model of the new γ-Reθ assume a two-dimensional transition, they are unable to take into account 3D effects. To address this, we have added optional modeling for crossflow to the γ-Reθ model, which extends our capabilities to include 3D effects in the transition from laminar to turbulent flow.

Precise Force Integration on Non-Closed Bodies

The flow solver now includes a pressure correction feature that enhances the precision of force integration on non-closed geometrical entities. This feature is especially useful in analyzing self-propulsion with a propeller geometry that is continuously linked to the vessel without any gaps between the bodies. In such cases, the pressure force integral depends on the external pressure level. If an appropriate methodology is not applied, the result of the integral may not correspond with the expected physical quantity, such as thrust or drag. This feature automatically corrects the force integration for non-closed geometrical entities.

Another Round of Improvements for the C-Wizard Based on Your Feedback!

Based on your feedback, we have implemented another series of improvements in the C-Wizard:

Foil VPP (Velocity Prediction Program) mode:

  • When using the Cavitation model, it is now possible to prescribe the initial value of the Sigma_init and the vapor density. The vapor density can also be automatically calculated based on the water temperature.
  • When running a project, you can create a domain-based either on the hull or the foil reference length.
  • You can now also run a simulation capturing extra wake refinements using adaptive grid refinement.

Resistance: when the Froude number is below 0.1, the timestep value is reduced to improve accuracy.

Trim optimization: It is now possible to specify a user-defined Z-CoG while still solving for the X and Y-coordinates using the hydrostatic estimator Domhydro.

And There's More:

  • Starting times for the actuator disk and probes have been added.
  • The Dynamic VPP module has undergone several windage and convergence testing improvements.
  • A new tool called WaveReg_FSD has been included in the package to simplify wave generation validation.
  • Linking the adaptive grid refinement region to a body to ensure proper capturing all the time.
  • The workflow has been improved by resolving over 40 previously identified issues.

We hope you will enjoy this new edition.

Do you not have Fine Marine yet, and would you like to try it out?