[lin]

I'm interested in the FSI and find that the floatingObject tutorial is a good starting point. However, I'm confused about this two libary, rigidBodyMotion and sixDoFRigidBodyMotion.

At a first glance, it seems that both are capable of simulation FSI, but I want to know what's the pros and cons of each one. After searching the forums and other materials, I can find that rigidBodyMotion can be used to simulate multiple articulated rigid bodies, then what is the advantage of sixDoFRigidBodyMotion? Can anyone help me clatify this question?

Thanks

[Michael@UW]

Hi Lin,
This is an interesting question, and I am also wondering about the differences.
The only thing I know is that sixDoFRigidBodyMotion is contained in the library of libsixDoFRigidBodyMotion.so but rigidBodyMotion is in librigidBodyMeshMotion.so.

Can you share your findings?

Thanks,
Michael

[random_ran]

The source codes are similar. The human readable information is almost
the same for both.

But here's a difference:

rigidBodyMotion:
#+begin_src cpp
// Private Member Functions

//- Initialize the body-state
void initialize();
#+end_src

sixDoFRigidBodyMotion:
#+begin_src cpp
// Private Member Functions

//- Calculate the rotation tensor around the body reference
// frame x-axis by the given angle
inline tensor rotationTensorX(scalar deltaT) const;

//- Calculate the rotation tensor around the body reference
// frame y-axis by the given angle
inline tensor rotationTensorY(scalar deltaT) const;

//- Calculate the rotation tensor around the body reference
// frame z-axis by the given angle
inline tensor rotationTensorZ(scalar deltaT) const;

//- Apply rotation tensors to Q0 for the given torque (pi) and deltaT
// and return the rotated Q and pi as a tuple

#+end_src

So, I just speculate that the sixDof is just a type of rigid body
motion. In other word, rigidBodyMotion is more general.