New Release - FINE™/Marine version 9.1

    Benoit Mallol     News     20.05.2020

Faster convergence, same accuracy - and plenty of other improvements in the newest version of FINE™/Marine


 

Convergence booster

Dynamic evolution of non-linear iterations and under relaxation coefficients during the acceleration phase of the boat has been implemented to get 25% of speedup, without any penalty on accuracy.

Drag convergence with and without the convergence booster

Convergence checker now interfaced

To avoid useless CPU time when the computation is already converged, the solver automatically stops the simulations when the physical quantities are converged. This interesting tool is now interfaced with smart default values to save time.

Convergence checker interface

Documentation upgrade

4 new demo cases have been added to the documentation package to illustrate the maneuvring operations: roll damping, zig-zag, turning circle, and course keeping are now part of the standard simulations of FINE™/Marine. Also, 1 democase for seakeeping based on the Tokyo Workshop 2015 has been added.

ONRT Turning circle

Extension of the self-propulsion plugin to double screwed ships

The plugin dedicated to self-propulsion with modeled propellers in sliding grids has been extended to double screwed ships.

Self-propulsion plugin in action for 2 propellers

Several C-Wizard improvements

  • Impose vertical center of gravity and let the C-Wizard calculate the longitudinal one
  • Successive restarts now handled with relative time
  • Convergence checker incorporated to save CPU time
  • Seakeeping improvements to decrease number of cells and use ITTC inertia matrix

That’s not all!

  • A new time step law to automatically define the time step in case of sliding or overset grids
  • The possibility to handle ducted propellers from our Rhino3D plugin
  • The improvement of the forces by section plugin in CFView to handle radial, tangential and axial forces distribution like for instance on propellers.

We hope you enjoy this new version!

 

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Posted by Benoit Mallol

Benoit holds a master's degree in Mechanical and Numerical modeling from the University of Bordeaux (France) with a specialization in CFD dedicated to free surface flows. For more than 10 years, he has been working on unstructured meshing strategies and marine applications. As head of the marine group and head of the unstructured meshing group, Benoit drives the product roadmaps, acts as the CFD technical expert to support all our offices around the world and makes sure that the software remains the reference on the different markets.