Thank you! I’ve requested access to your project from @dheiny, and will begin work on it soon. Meanwhile, I’ll try and address some of your questions.
seems like something happened with my account when I subscribed to the forum, now it is a basic account and no longer an academic one… can it be fixed?
I think the following procedure should give you access to the academic account:
- Log in to your SimScale account.
- Click on the My Account button (located on the top-right of the platform interface)
- Click on Upgrade Plan button. This will take you to a new page.
- From the two tabs (Commercial and Academic), select the Academic tab.
- You should be able to select the Academic Plan then. In case the problem persists, @agata could help you out.
Any tips on how to define the 2 phases?
Sure! Once you create a new simulation, the initialization of the phases can be done using Geometry Primitives ([details here]). Geometry Primitives can be specified under Simulation Designer->Simulation->Domains->Geometry Primitives
How it works is, in the Phase Fraction part of the Initial Conditions tab, we switch to Subdomain-based option. Then, we specify the Default Value of the phase fraction. This initializes the entire domain to that value of the phase fraction (say 0).
We can then use a previously defined Geometry Primitive (lets say we use a Cartesian Box), to initialize only that part of the domain which is occupied by the box to the other phase fraction value (in this case, 1).
Must the water plane go into the hull? My waterplane is cut by the hull skin, it has a hole where the hull lies. I don’t know whether is it right. I’ve seen many simulations where waterplane goes into the hull.
You are right, it is not exactly how one would want their boat to sail as , and we are looking at introducing more specific ways of initializing the domain in the future.
But I think it does not affect our simulation to a big extent. This is because we are not including Fluid-Structure Interaction, and hence presence of water in the boat does not affect the buoyant forces on the boat. It does change the movement of air inside the hull cavity - which can be safely ignored if the focus is on drag and wake studies on the outer surface of the boat.
One workaround could be to fill the inner part of the boat with solid material, so that it is not counted as a part of the domain.