ELFT HÍRADÓ

[Zoltan Mate <mate AT namafia.atomki.hu>]

Az MTA Atommagkutató Intézetének nagy előadójában
(Debrecen, Bem tér 18/c. 12. ép. III. em.)
2009. február 5-én, csütörtökön 11:00-kor

                Takashi Shimada
        (Department of Applied Physics
              University of Tokyo)

              How to Swim in Sand?

címmel előadást tart.
Az előadás előtt 10:30-tól tea.
Vendégeket szívesen látunk.

                                 Máté Zoltán

Abstract:
Exotic but efficient swimming modes under low Reynolds number condition 
have attracted much interest. Swimming in granular matter, which has 
static structure, is more interesting and complex problem. I will present 
our result of an event driven simulation of swimming in granular 
particles. Our "pushmepullyou" swimmer consists of two disks connected by 
a spring. To make the swimming motion, we let the disks inflate and 
deflate, and the natural length of the connection stretches and shrinks in 
time. We can find an ideal swimming frequency for which the resulting 
swimming velocity is optimal. More interestingly, there also exists an 
optimum non-zero frequency for the efficiency of the swimming.