Vibration of biomedical carbon nanotubes

Carbon nanotube(CNT)-based fluidic systems hold a great potential for emerging medical applications such as drug delivery systems for cancer therapy. CNTs can be used to deliver anticancer drugs into a target site under a magnetic field guidance. One of the critical issues in designing such systems is how to avoid the vibration induced by the fluid flow, which is undesirable and may even promote the structural instability. The main objective of the present research is to understand the fluid structure interaction (FSI) and the associated flutter instability of a CNT when it is inserted to human body for drug delivery and controlled by magnetic field.  

- Configuration of CNT conveying magnetic fluid embedded in biological tissue subjected to a longitudinal magnetic field.

schematic of fluid conveying CNT

- Example stability diagram for fluid-structure interaction with cantilevered CNT under magnetic field. It shows the critical speed (ucr), which demonstrates the coupled effects of the magnetic field and viscoelastic parameters on it, as a function of the non-dimensional mass ratio β (τ=0.05, Kn=0.001);τ is a nondimensional variable given by τ=ae0/L where a is the internal characteristic length, eis the material constant, and L is the length of CNT. Kn is the Knudsen number.

example fluid induced instability

This research has been conducted in collaboration with Prof. Hyock-Ju Kwon.

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