[quarkz]

Hi,

I have 3 bodies - 1 wing + 1 left aileron + 1 right aileron.

I need to simulate these 2 motions together:

1. entire full body roll motion - so all the 3 bodies will rotate, no mesh deformation

2. left aileron deflect upwards at constant rotation rate of 5deg/s, mesh will deform

3. right aileron deflect downwards at constant rotation rate of 5deg/s, mesh will deform

So can these be done in OF easily?

I can rotate entire body using this in dynamicMeshDict:

dynamicFvMesh dynamicMotionSolverFvMesh;

motionSolverLibs ("libfvMotionSolvers.so");

motionSolver solidBody;

cellZone none;


solidBodyMotionFunction rotatingMotion;

rotatingMotionCoeffs
{
origin (0.1 0. 0.);
omega 0.45378560551852569000015959980704; //units of rad/s
axis (1 0 0);
}

I can also deflect a single aileron using this in 0/pointDisplacement:

wing_aileron_left
{
type angularOscillatingDisplacement;
value uniform (0 0 0);
axis (-0.309456346 -0.051111141 -0.949539057);
origin (0.83342853 0.070126234 1.6370375);
angle0 0;
amplitude 0.13439035240356337742312418917362; //units of rad
omega 6.283185307179586476925286766559; //units of rad/s


}


However, combining them doesn't work. Also, is there a simple rotation motion to rotate the aileron? I can only use angularOscillatingDisplacement, which is not exactly what I want.

Can I use dynamicMultiMotionSolverFvMesh? Do I need to define the cellZone?

Thanks.

[tecmul]

I think the relativeMotion tutorial does something similar to what you're after.

About the rotation of the aileron, I suggest modifying the angularOscillatingDisplacment class so that it reads time-value pairs from a file. It's pretty simple to do, just add a member to the class of type TimeFunction1. This way you can specify any kind of rotation you like.

[quarkz]

Hi Tecmul,

Thanks for the suggestions. I will try the modification, although my C++ skill is quite poor. As for the relativeMotion, it's a bit different and I've been trying to modify it but so far I've not been successful. Will keep trying.