Unsteady evolution of slip and drag in surfactant-contaminated superhydrophobic channels

HIGHLIGHTS

• What: From a fundamental view, the authors seek to understand how variations in time and space in surfactant transport can affect the drag-reducing properties of SHS in a canonical channel flow. The authors show how a time-dependent one-dimensional asymptotic theory, derived from the three-dimensional Stokes and surfactant transport equations, can be adapted to describe the unsteady evolution of slip and drag in a laminar pressure-driven channel flow with streamwiseand spanwise-periodic grooves, allowing for time-dependent distributions of surfactant flux at the channel inlet. The authors provide a table with closed-form . . .
  

   

  

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