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Numerical research on the coherent structure in the viscoelastic second-order mixing layers. (English) Zbl 0918.76059
Summary: Numerical simulations are performed for time-developing plane mixing layers of viscoelastic second-order fluids by using the pseudospectral method. Roll-up, pairing and merging of large eddies are examined at high Reynolds numbers and low Deborah numbers. The effect of viscoelasticity on the evolution of large coherent structures is shown by making a comparison between the second-order and Newtonian fluids at the same Reynolds numbers.

MSC:
76M25 Other numerical methods (fluid mechanics) (MSC2010)
76A10 Viscoelastic fluids
65M70 Spectral, collocation and related methods for initial value and initial-boundary value problems involving PDEs
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