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.
The various line segments and truncated wings representing the CS are approximated well in the full numerical spectrum
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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.