Body to rotate by action of the air flow
Hi all, I need your help
How can I do for a body to rotate by action of the air flow?
I want to know the speed of rotation as a function of air velocity.
Do I have to do with "moving reference frame model? or "rigid body motion model?
What you need to use to accomplish your goal is the "6-DOF Motion Model." You can then setup reports to monitor rotation rate.
Since this is a complicated model, I suggest you read all the help documentation and practice on very simple geometry first.
but one more question
how do I put up resistance to rotation.
thank you very much
HELP > Modeling > Modeling Dynamic Fluid Body Interaction > Working with 6-DOF Bodies > What are External Forces and Moments? > Adding an External Force or Moment
Read the help file, there's a damping moment, and a damping force you can add.
Yes, thank very much.
You are the Best.
From Spain realy thanks.
Do you had success in simulation? Here, I have a channel (2D) with a square in the middle and I'd like to simulate the rotate this object by action of the fluid flow. I've been using a 6DOF udf together with dynamic mesh, but when I run the solver after some iterations appear the following error: Warning: negative volume detected --> repeat smoothing!
I've tried decrease the time step, but the error persists. Following below the udf that I've been using:
DEFINE_SDOF_PROPERTIES(quadrado, prop, dt, time, dtime)
prop[SDOF_ZERO_TRANS_X] = TRUE;
prop[SDOF_ZERO_TRANS_Y] = TRUE;
prop[SDOF_ZERO_TRANS_Z] = TRUE;
prop[SDOF_ZERO_ROT_X] = TRUE;
prop[SDOF_ZERO_ROT_Y] = TRUE;
/* Define the mass matrix */
prop[SDOF_MASS] = 1;
prop[SDOF_IXX] = 0.25;
prop[SDOF_IYY] = 0.25;
prop[SDOF_IZZ] = 0.50;
printf ("\n2d_test_box: Updated 6DOF properties");
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