February 7th, 2018
The SimScale Forum is the place for engineers to start discussions and collaborative projects to broaden their experience and knowledge regarding simulation and computer-aided engineering in general.
A popular topic in the CAE forum is a collaborative project in which the engineers have simulated the free surface flow around a boat hull to predict the waterline on the hull, the steady waves created around the hull, and especially the drag.
It began with the mesh provided by David:
The region of the free surface was refined with a region refinement and the cells around the boat hull itself were refined with a surface refinement.
Soon suggestions appeared and an improved mesh was created by another community member:
The boat sails at a speed of 2 m/s and the simulation ran for about 38 seconds of simulated time. Below is an animation of the interface, which shows the formation of a stable wake over time.
Further suggestions from the forum members allowed for additional calculations to be made, which led to the modification of the domain size and setting of the correct input velocity.
Extending the boat simulation, Saumitra showed that with the Fr=0.46, both diverging and transverse wave systems appeared in the beginning but then were lost, possibly due to the fact that the domain was still too small.
At this juncture, everybody started to work intensively on the project and add their input. Herewith are all the replies, calculations, simulations, and documentation that followed.
If you are interested in the shipbuilding industry or the topic caught your attention, just join the discussion and be part of our growing CAE community!
Also, you might be interested in this project: Free Floating Boat in a Wave Tank. You can copy it and import it into your own workspace for free. From there, just change the CAD design or settings according to your specifications.
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