Wednesday, April 16, 2008

well, maybe I need a tighter tube

If the sleeve is propelled by phonons from the narrow tube, I need to come up with something else. You can see the seem where I split and anchored the tube (a potential problem). Everything to the left is at 200 K and everything to the right, including the sleeve, (maybe another problem) is at 500 K. Plus since this sim is in a vacuum, I would need to ensure there is some physical contact between the two tubes. It doesn't look like there is, and maybe my temp gradient is too steep. I need a nice scale from crazy vibrations pushing to moderate vibrations pushing to minimal vibrations?

A lot of stuff to consider.


jim said...

I don't know if this will be helpful or not but in the experiment the two tubes did not have the same structure (armchair, zig-zag or helical are the three types of nanotubes) but I don't know which ones they used.


Perry E. Metzger said...

Is phonon transport even rigorously modeled by the molecular mechanics based simulator in use here?

Anonymous said...

The temp was 1000 C at the center and 27 C at the ends. Inner tube 1,000 nm in length and 200 nm for the outer sleve.