Journal
PHYSICS OF FLUIDS
Volume 33, Issue 3, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/5.0043146
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The study investigates the effects of velocity skewness on oscillating Stokes layer, showing that velocity skewness has a stabilizing effect and increases the critical Reynolds number for linear instability. During disturbance development, the direction in which the wall velocity achieves maximum absolute value plays a crucial role.
The effects of velocity skewness on the oscillating Stokes layer are investigated. Linear stability characteristics for the family of velocity-skewed time-periodic flows are determined using Floquet theory. Neutral stability curves and critical parameter settings for instability and the structure of the eigenfunctions are presented. Velocity skewness establishes a stabilizing effect and increases the critical Reynolds number for the onset of linear instability to larger values than that found in the non-skewed Stokes layer. Solutions indicate that disturbances develop in the direction that the wall velocity achieves a maximum absolute value.
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