Recent content by moejoe

  1. M

    Air resistance on rotating cylinder

    I don't know if this solution works or not because I would have to experimentally verify it. I still don't know if I derived a correct theoretical model for this case. I agree with LostConjugate that the friction will alter (i.e. decrease) with time as the air currents equilibrate with the...
  2. M

    Size of a Diamagnetic for Levitation

    I got those equations from this paper: "Diamagnetically stabilized magnet levitation" by LO Heflinger Link: http://netti.nic.fi/~054028/images/LeviTheory.pdf I was thinking it may have to do with some kind of potential energy of the diamagnetic with relation to the levitating magnet, so for...
  3. M

    Air resistance on rotating cylinder

    Thank you for sending me that article. The problem in the article is regarding a rotating cylinder in a wind tunnel. I am merely considering a rotating cylinder where there is insignificant air velocity. I have discarded the drag equation for the cylinder because I have realized that there...
  4. M

    Size of a Diamagnetic for Levitation

    Hello, I have been interested in the problem of diamagnetic levitation where you have typically 2 slabs of some pyrolitic graphite (which is diamagnetic) and between it you have some rare Earth magnet that's levitating thanks to those graphites (and 1 more magnet somewhere above). I have...
  5. M

    Air resistance on rotating cylinder

    Hello, I am interested in the problem of air resistance on a cylinder rotating about its axis (axis of rotation is through the flat parts). I used the drag equation and substituted the "cross-sectional" area as the area that's rotating at R (if R is the radius of the cylinder) so it would be...
Back
Top