Discussion flexible turbine rotates in water(FSI+6DOF)

jerryd · April 1, 2018, 05:05

Hi,everyone

Problem

I am working on a problem that a flexible turbine rotates in water.
The softwares are starccm+ coupled with abaqus.

Describe

As the rotating motion of rigid body can be realized with the DFBI method.
The question is how can I add the fluid structure interaction of deformation of the turbine blade in the this?

Things Have been tried:
I have already tried to use the morphing method in motion, however, the grid will be morphing to twist with rotating motion until the negative volume appears.

The initial mesh is hereoriginal mesh.jpg
After morphing with rotating the mesh twisted like this after morphing.jpg

Thank you

ping · April 7, 2018, 01:11

you should be rotating the system with a rotating motion and not morphing - it is for just the small deflections of the blades in this sort of model
i would use a cylindrical domain and rotate the whole mesh then do the fsi in stars fe solver
use mrf first then maybe do actual rotation but this might not be needed
not sure why you would need dfbi

jerryd · April 15, 2018, 10:07

Quote:

Originally Posted by ping

you should be rotating the system with a rotating motion and not morphing - it is for just the small deflections of the blades in this sort of model
i would use a cylindrical domain and rotate the whole mesh then do the fsi in stars fe solver
use mrf first then maybe do actual rotation but this might not be needed
not sure why you would need dfbi

Thank you so much. I will try that.

zlw306 · August 21, 2018, 11:41

Have you figure it out,i also want to add rotation and morph on fsi propeller simulation?

从我的 iPhone 发送，使用 CFD Online Forum

April 1, 2018, 05:05	Discussion flexible turbine rotates in water(FSI+6DOF)	#1
jerryd New Member Yongle Ding Join Date: Feb 2017 Posts: 3 Rep Power: 9	Hi,everyone Problem I am working on a problem that a flexible turbine rotates in water. The softwares are starccm+ coupled with abaqus. Describe As the rotating motion of rigid body can be realized with the DFBI method. The question is how can I add the fluid structure interaction of deformation of the turbine blade in the this? Things Have been tried: I have already tried to use the morphing method in motion, however, the grid will be morphing to twist with rotating motion until the negative volume appears. The initial mesh is hereoriginal mesh.jpg After morphing with rotating the mesh twisted like this after morphing.jpg Thank you

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Using 6dof for 3D turbine rotation	mg.mithun	Fluent UDF and Scheme Programming	8	July 24, 2018 00:53
Non-physical Results of Turbine - 6DOF	ram_call	FLUENT	0	February 2, 2018 07:49
Simulating a turbine rotatory with 6dof	jealor	Fluent UDF and Scheme Programming	0	October 23, 2016 06:40
CFD analysis on wind turbine rotor	Ken (Wind Turbine CFD Super Rookie)	Main CFD Forum	45	February 9, 2016 14:07
6dof for rotation of turbine: unable to fix the center	Havinh	Fluent UDF and Scheme Programming	0	August 5, 2015 05:35

April 7, 2018, 01:11		#2
ping Senior Member Ping Join Date: Mar 2009 Posts: 556 Rep Power: 20	you should be rotating the system with a rotating motion and not morphing - it is for just the small deflections of the blades in this sort of model i would use a cylindrical domain and rotate the whole mesh then do the fsi in stars fe solver use mrf first then maybe do actual rotation but this might not be needed not sure why you would need dfbi

August 21, 2018, 11:41		#4
zlw306 New Member Liwei Zhang Join Date: Jun 2017 Posts: 10 Rep Power: 8	Have you figure it out,i also want to add rotation and morph on fsi propeller simulation? 从我的 iPhone 发送，使用 CFD Online Forum