I have a circular tube that is approximately 150 mm long and the last 15 mm of the tube (the tip) will deflect 30 degrees to -30 degrees. I have a velocity inlet and a pressure outlet. I want to simulate fluid flowing through the bending tip. The tip motion is to be defined from an external device and is not due to fluid forces.
I had previously posted on this topic and got some great advice: http://studentcommunity.ansys.com/thread/dynamic-meshing-of-bending-tube/
I have compiled a UDF in Fluent to assign SHM (DEFINE_CG_MOTION) to the tip boundaries as a rigid body. However, this uses a cosine motion of oscillation that produces an 'elbow' instead of a 'bend' of the tip. Is there a UDF that may be used to help define this bending motion of the tip? Any suggestions or advice would be greatly appreciated.
I have attached a picture detailing how the tip will displace during one oscillation. The red dotted lines indicate where the bending will take place.