Abstract
An unsteady two-dimensional incompressible flow inside a rectangular container under a torsional oscillation has been numerically obtained. Effect of three parameters, the aspect ratio, the dimensionless angular frequency, and the Reynolds number, on the flow pattern’s development is studied. The flow is irregular and aperiodic at the Reynolds number 5000. Some aspects of the vortical flow dynamics are investigated. Observed in the numerical experiment are stretching, folding, splitting, merging, and curling etc.
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