Fig. 7. Profiles of the dimensionless U_x velocity component at locations –90° (left profiles) and + 90° (right profiles) relative to the stagnation point (bottom of circle) for the flow past a flagellum (circle) plotted along the y/d_f axis at x/d_f=5 (passing through the ±90° locations). Results are given for four dimensionless times (t^*=1 to t^*=4) for a subregion of the entire 20d_fx20d_f calculation domain, and at t^*=4 the flagellum Reynolds number is Re_f=50. The symmetrical profiles show the U_x velocity component increasing with time. At each time, the U_x velocity component maximizes near the flagellum surface (a characteristic of this class of flows) and decreases to the free stream value U_o(t) for that time within less than two flagellum diameters. The black bars denote the lengths, to scale, of 0.25xd_f mechanoreceptor (MR) sensilla oriented normal to the flagellum surface.