Learning Forum

[sergioC]

Hi everyone,

I'm currently stuck and unable to figure something out with the system couling model and was hoping to get some help or suggestions.

I'm doing an FSI of a yacht sail. For the structural side I'm treating it as a shell181 with the membrane option turned on. This surface is then marked as the "Fluid Solid Interface".

On the CFD side I'm simulating it in Fluent. My probelm is that when i set the sail surface to the no-slip boundary condition fluent creates a shadow surface thus separating the sail into two faces.

The implication of this is that when i create the data transfers in the system coupling module I have two surfaces on the CFD side and only 1 on the Mechanical side. As such I am only able to model the forces on one side, I would instead like to model both.

I have tried creating additional 1 way transfers between the excluded CFD surface and the mechancial surface but this logically results in an error:

[Karthik Remella]

Hello,nCan you not disable the solid part of the geometry in your Fluid simulation? This way you won't have a wall and wall-shadow regions in your Fluent simulation and will have just one single wall. nIf this doesn't work for you - then you could try to use the surface with the 'fluid' adjacent cell zone. You should be able to see this in your wall boundary condition panel. One of the wall or wall-shadow should be the boundary adjacent to the fluid cell zone and the other should be solid. You should use the boundary next to the 'Fluid' region for data transfer.nI hope this helps.nKarthikn