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Abstract: The effects of polymer additives on Rayleigh-Taylor RT instability ofimmiscible fluids is investigated using the Oldroyd-B viscoelastic model.Analytic results obtained exploiting the phase-field approach show that inpolymer solution the growth rate of the instability speeds up with elasticitybut remains slower than in the pure solvent case. Numerical simulations ofthe viscoelastic binary fluid model confirm this picture.



Author: G. Boffetta, A. Mazzino, S. Musacchio, L. Vozella

Source: https://arxiv.org/



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