The Rayleigh-Taylor instability is investigated in a material with a shear modulus μ and yield stress σ₀. Incompressible experiments are conducted with constant and impulsive acceleration histories $g(t)$ using a fully characterized material. Two dimensional (2D) perturbations are found to be stabilized for wave number k>ρg/2μ and initial amplitude h₀<σ₀/ρg, where ρ is the density. The stability region is larger for 3D perturbations. Unstable modes are found to grow classically during the acceleration phase, but they can recover elastically while coasting.
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Dimonte et al. (1998) studied this question.
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