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. Author manuscript; available in PMC: 2011 Jan 1.
Published in final edited form as: J Fluid Mech. 2010 Jan 1;642:509–539. doi: 10.1017/S0022112009992692

Figure 14.

Figure 14

Comparison of the shear stress level and interfacial surfactant concentration profiles between a horizontal and vertical tube. The flow Reynolds number is 2.0 and the aspect ratio is 1.0. The Froude number is ∼0.71.