Figure 7.

Plot of r_sp/r_sp^l versus h/r_sp^l for simulations (shapes) and experiments (circles), where r_sp^l is the predicted distance to the eddy centre for large h as described in the text. The solid line is the prediction r_sp = 0.44 h from the stokeslet model. In experiments, ℓ_st was measured from the anchoring tip of the Vorticella stalk to the middle of the crown. In simulations, both h, the distance between top and bottom boundaries, and ℓ_st, the distance to the third no-slip boundary, were varied. Squares: h/a = 2.5–40, ℓ_st/a = 3; diamonds: h/a = 2.5–40, ℓ_st/a = 10; upward triangles: h/a = 3, ℓ_st/a = 1.5–50; downward triangles: h/a = 10, ℓ_st/a = 1.5–50.