TY - JOUR
T1 - Elastic three-sphere microswimmer in a viscous fluid
AU - Yasuda, Kento
AU - Hosaka, Yuto
AU - Kuroda, Mizuki
AU - Okamoto, Ryuichi
AU - Komura, Shigeyuki
N1 - Funding Information:
Acknowledgments S.K. and R.O. acknowledge support from a Grant-in-Aid for Scientific Research on Innovative Areas “Fluctuation and Structure” (Grant No. 25103010) from the Ministry of Education, Culture, Sports, Science and Technology of Japan and from a Grant-in-Aid for Scientific Research (C) (Grant No. 15K05250) from the Japan Society for the Promotion of Science (JSPS).
Publisher Copyright:
©2017 The Physical Society of Japan.
PY - 2017/9/15
Y1 - 2017/9/15
N2 - We discuss the dynamics of a generalized three-sphere microswimmer in which the spheres are connected by two elastic springs. The natural length of each spring is assumed to undergo a prescribed cyclic change. We analytically obtain the average swimming velocity as a function of the frequency of cyclic change in the natural length. In the low-frequency region, the swimming velocity increases with frequency, and its expression reduces to that of the original three-sphere model by Najafi and Golestanian. Conversely, in the high-frequency region, the average velocity decreases with increasing frequency. Such behavior originates from the intrinsic spring relaxation dynamics of an elastic swimmer moving in a viscous fluid.
AB - We discuss the dynamics of a generalized three-sphere microswimmer in which the spheres are connected by two elastic springs. The natural length of each spring is assumed to undergo a prescribed cyclic change. We analytically obtain the average swimming velocity as a function of the frequency of cyclic change in the natural length. In the low-frequency region, the swimming velocity increases with frequency, and its expression reduces to that of the original three-sphere model by Najafi and Golestanian. Conversely, in the high-frequency region, the average velocity decreases with increasing frequency. Such behavior originates from the intrinsic spring relaxation dynamics of an elastic swimmer moving in a viscous fluid.
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U2 - 10.7566/JPSJ.86.093801
DO - 10.7566/JPSJ.86.093801
M3 - Article
AN - SCOPUS:85031298957
SN - 0031-9015
VL - 86
JO - journal of the physical society of japan
JF - journal of the physical society of japan
IS - 9
M1 - 093801
ER -