Abstract
This chapter is devoted to the dynamics of isotropic turbulence in dilute polymer solutions. Governing equations associated to the very popular FENE-P rheological model are exhaustively discussed. The three main physical regimes are discussed in both physical and spectral space, along with associate kinetic and elastic energy cascades.
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Notes
- 1.
This model is formally equivalent to a linearized model for MagnetoHydroDynamics, Aflven waves being replaced by elastic waves. It also predicts equipartition of kinetic and elastic energy, which is not reported in non linear DNS results. This equilibrium shares many features of the equilibrium between kinetic and acoustic energy found in linearized theory for weakly compressible isentropic turbulence, see Sect. 13.2.2.
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Sagaut, P., Cambon, C. (2018). Isotropic Turbulence with Coupled Microstructures. I: Visco-Elastic Turbulence. In: Homogeneous Turbulence Dynamics. Springer, Cham. https://doi.org/10.1007/978-3-319-73162-9_5
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