Volume 104, Number 5, December 2013
|Number of page(s)||6|
|Section||Interdisciplinary Physics and Related Areas of Science and Technology|
|Published online||06 January 2014|
Force exerted on the spiral tip by the heterogeneity in an excitable medium
1 College of Science, China University of Mining and Technology - Xuzhou 221116, China
2 Department of Physics, Lanzhou University of Technology - Lanzhou 730050, China
3 School of Mathematics, Liaoning University - Shenyang 110036, China
Received: 16 September 2013
Accepted: 6 December 2013
Heterogeneity exerts a repulsive force on the approaching spiral tip, and the attractive force prevents the spiral tip from unpinning from the heterogeneity once the tip has anchored. Studying the two kinds of forces in the same context enables comparisons between them. Findings indicate the following: 1) the value of the attractive force is about a few tens that of the repulsive force for different parameter values; 2) the repulsive and attractive forces always increase with the level of heterogeneity; and 3) compared with the size of the heterogeneous area, the level of heterogeneity influences the forces more significantly.
PACS: 82.40.Ck – Pattern formation in reactions with diffusion, flow and heat transfer / 05.65.+b – Self-organized systems / 89.75.Kd – Patterns
© EPLA, 2013
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