FENE-P shearing flows have up to six continuous spectra; for L>50 three are nearly identical and β-independent while two novel β-dependent spectra allow phase speeds outside the base velocity range including negative values.
Steinberg, New direction and perspectives in elastic instability and turbulence in various viscoelastic flow geometries without inertia, Low Temperature Physics 48, 492 (2022)
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Nature of continuous spectra in wall-bounded shearing flows of FENE-P fluids
FENE-P shearing flows have up to six continuous spectra; for L>50 three are nearly identical and β-independent while two novel β-dependent spectra allow phase speeds outside the base velocity range including negative values.