T1           P1     P2     P3     P4     P5

 

viscosity ratio, κ=1.5 

M1      M2      

                          M1, straight capillary (a=0.0); intermediate wettability, θ_A=55deg, θ_R=50deg       M2, sinusoidal capillary (a=0.5); adverse wettability, θ_A=85deg, θ_R=80deg; curvature reversal

  

M3-M5: sinusoidal capillary (a=0.4);    viscosity ratio, κ=1.5;    intermediate wettability, θ_A=55deg, θ_R=50deg

M3      M4     M5     

  M3: Ca=0.25×10^-6                                                                M4: Ca=0.25×10^-4                                                    M5: Ca=0.25×10^-3

 

Indicative videos of simulations of incompressible droplets moving along axisymmetric, sinusoidal capillary tube (Hydrolab productions ©)

Precursor works (T1) J-D Touris, undergraduate project study     (P1-P5) N. Papachristou, postgrad thesis project

 (M1-M5) K. Mouravas, PhD project (on-going)