CFD tutorial for flow around ships using ANSYS fluent

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Last Post 13 November 2018

Jovi_boy posted this 30 August 2018

Hi, I am fairly new to ANSYS (I've looked at a LOT of sources and tutorials) and want to simulate flow around a boat hull while also acquiring useful data (drag, straight line ability of my boat, and maneuverability) so I can optimize my boat. I still have no clue as to how to do this and how I can get data from it. My general method is to create 2 groups (air and water) and have those volumes be cut in by the shape of my boat (I'll have empty space where the boat should go). From here I have no idea what to do. I have consulted these sources:

https://drive.google.com/file/d/0BxWAqiVfkTWMOGRkODViMDMtY2VmZC00NjRlLTg3MDEtMDQ0NTE4MjNkZGJl/view?hl=en

and https://digitalcommons.cedarville.edu/cgi/viewcontent.cgi?article=1092&context=research_scholarship_symposium

I've been using VOF to simulate air and water, but I really have no idea what plugging in certain numbers and options does. I would really appreciate it if someone could reference me to a definitive tutorial for this. I've been trying to figure this out for a month now to no avail. Should I even use the fluent option?

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rwoolhou posted this 30 August 2018

Short answer is yes, Fluent is the correct tool.

Have a look in the documentation for the Open Channel Flow (it's a special option for VOF), and take it from there. For simplicity I'd suggest fixing the ship in place rather than trying to move it!

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Raef.Kobeissi posted this 03 September 2018

you will need to use 6 DOF model in order to simulate this model with the open channel and wave model (VOF). It is doable. I will try to make a tutorial about it soon! Briefly, the boat will have to be assigned as a rigid and it should be surrounded by a sphere or a box that will deform, the whole lot will need separate UDF files to assign their moment of inertias.

Raef Kobeissi

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kkanade posted this 04 September 2018

Hi,

There are many tut available online for vof in fluent. I would say start with 2D.

Regards,

Keyur

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Jovi_boy posted this 05 September 2018

By fixing it in place do you mean I should have my boat be cut into my volume domain or that my boat should exist inside of the domain as a separate body?

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Kevinsandoval posted this 13 November 2018

Hola , solucionaste el problema? tengo que hacer lo mismo , simular la estabilidad del buque , tengo pensado en hacerlo con VOF y malla dinamica aplicando el modelo 6dof , voy por buen camino? agradecería sus comentarios