中国物理B ›› 2014, Vol. 23 ›› Issue (11): 114703-114703.doi: 10.1088/1674-1056/23/11/114703
• SPECIAL TOPIC—Non-equilibrium phenomena in soft matters • 上一篇 下一篇
张何朋a, 刘斌b, Bruce Rodenbornc, Harry L. Swinneyc
Zhang He-Peng (张何朋)a, Liu Bin (刘斌)b, Bruce Rodenbornc, Harry L. Swinneyc
摘要:
We study the propulsion matrix of bacterial flagella numerically using slender body theory and the regularized Stokeslet method in a biologically relevant parameter regime. All three independent elements of the matrix are measured by computing propulsive force and torque generated by a rotating flagellum, and the drag force on a translating flagellum. Numerical results are compared with the predictions of resistive force theory, which is often used to interpret micro-organism propulsion. Neglecting hydrodynamic interactions between different parts of a flagellum in resistive force theory leads to both qualitative and quantitative discrepancies between the theoretical prediction of resistive force theory and the numerical results. We improve the original theory by empirically incorporating the effects of hydrodynamic interactions and propose new expressions for propulsive matrix elements that are accurate over the parameter regime explored.
中图分类号: (Biological fluid dynamics)