Dynamic mesh, AMI and 6-DoF to predict rotor speed

otm · March 18, 2013, 11:45

I'm interested in determining the rotational speed of a turbine. I have an idea of how I think it could be made but I have not been able to find any tutorials that do exactly what I want to do. So instead of spending time with trial and error I ask for some guidance by the community.

I'm running OF-2.1.x. My idea is to use pimpleDyMFoam and begin by making a simple test case by altering the mixerVesselAMI2D case so that:

* The current "stator" part of the mesh rotates at at constant speed. This should be straitforward by using the same methodology as for the rotor mesh part in the original tutorial.

* The current "rotor" part (which rotates at constant speed in the original tutorial) should be braked with a fixed torque and the resulting rotational speed should be calculated by the 6-DoF solver (with 5-DoFs constrained so that only rotation is possible)

Seems quite simple to me but I have not been able to find anywhere the combination of "solidBodyMotionFvMesh" with "sixDoFRigidBodyDisplacement".

Would it work if I made a pointDisplacement-file for the boundaries of the rotor?

Any advice is appetiated!
//Olle

hakonbar · March 19, 2013, 11:31

I would also be interested in combining sixDoFMotion with a sliding mesh. I've found an old powerpoint presentation by Hrvoje Jasak (http://powerlab.fsb.hr/ped/kturbo/Op...A_5Jan2009.pdf) where he presents a setup which seems to do just that (the single capsizing body, slide 14). I haven't found any case files to go with it, though, so I can't be sure.

SailorLiu · January 29, 2015, 15:30

Hi hakonbar,

I am also interested in simulating the capsizing body case presented in Prof Jasak's PPT. Have you finally worked it out after almost two years?
What Prof Jasak used is GGI in foam-extend version rather than AMI in OpenCFD version. But I have not found the case in the extend version. It will be of greate help if you can share some of your findings with us. Thank you very much!

Yuanchuan

Quote:

Originally Posted by hakonbar

I would also be interested in combining sixDoFMotion with a sliding mesh. I've found an old powerpoint presentation by Hrvoje Jasak (http://powerlab.fsb.hr/ped/kturbo/Op...A_5Jan2009.pdf) where he presents a setup which seems to do just that (the single capsizing body, slide 14). I haven't found any case files to go with it, though, so I can't be sure.

March 18, 2013, 11:45	Dynamic mesh, AMI and 6-DoF to predict rotor speed	#1
otm New Member Join Date: Jun 2009 Posts: 22 Rep Power: 17	I'm interested in determining the rotational speed of a turbine. I have an idea of how I think it could be made but I have not been able to find any tutorials that do exactly what I want to do. So instead of spending time with trial and error I ask for some guidance by the community. I'm running OF-2.1.x. My idea is to use pimpleDyMFoam and begin by making a simple test case by altering the mixerVesselAMI2D case so that: * The current "stator" part of the mesh rotates at at constant speed. This should be straitforward by using the same methodology as for the rotor mesh part in the original tutorial. * The current "rotor" part (which rotates at constant speed in the original tutorial) should be braked with a fixed torque and the resulting rotational speed should be calculated by the 6-DoF solver (with 5-DoFs constrained so that only rotation is possible) Seems quite simple to me but I have not been able to find anywhere the combination of "solidBodyMotionFvMesh" with "sixDoFRigidBodyDisplacement". Would it work if I made a pointDisplacement-file for the boundaries of the rotor? Any advice is appetiated! //Olle

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March 19, 2013, 11:31		#2
hakonbar New Member Håkon Bartnes Line Join Date: Mar 2013 Posts: 27 Rep Power: 14	I would also be interested in combining sixDoFMotion with a sliding mesh. I've found an old powerpoint presentation by Hrvoje Jasak (http://powerlab.fsb.hr/ped/kturbo/Op...A_5Jan2009.pdf) where he presents a setup which seems to do just that (the single capsizing body, slide 14). I haven't found any case files to go with it, though, so I can't be sure.