A Numerical Study of Effect of Reynolds Number and Inclination Angle on the Behavior of Drops on an Inclined Surface at High Viscosity Ratio

The effect of Reynolds number and inclination angle on the behavior of drops suspended on an inclined surface at high viscosity ratio is studied by numerical simulations at non-zero Reynolds number. The flow is driven by the acceleration from gravity without any pressure gradient in the flow direction. It is found that by increasing Reynolds number, drops close to the floor or close to the free surface move to the center of channel and the equilibrium position moves away from the channel floor, increasing the fluctuation energy as well. The same trend is observed when the inclination angle with respect to horizontal direction increases. That is, when the inclination angle of the channel with respect to horizontal direction increases, drops close to the floor or close to the free surface move to center of the channel. The equilibrium position moves away from the channelfloor and fluctuation energy increases.