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Article Dans Une Revue ACS Macro Letters Année : 2020

Viscoelasticity-Induced Onset of Slip at the Wall for Polymer Fluids

Résumé

The progressive onset of slip at the wall, which corresponds to a slip length increasing with the solicitation time before reaching a plateau, has been investigated for model viscoelastic polymer solutions, allowing one to vary the longest relaxation time while keeping constant solid-fluid interactions. A hydrodynamic model based on a Maxwell fluid and the classical Navier's hypothesis of a linear response for the friction stress at the interface fully accounts for the data. In the limit of the linear viscoelasticity of the fluid, we could postulate a Newtonian response for the interfacial friction coefficient reflecting the local character of solid-liquid friction mechanisms. Deviations between the experiments and our model are observed when the fluid is far from its linear viscoelastic behavior.
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Dates et versions

hal-02992176 , version 1 (18-11-2020)

Identifiants

Citer

Marion Grzelka, Iurii Antoniuk, Eric Drockenmuller, Alexis Chennevière, Liliane Léger, et al.. Viscoelasticity-Induced Onset of Slip at the Wall for Polymer Fluids. ACS Macro Letters, 2020, ⟨10.1021/acsmacrolett.0c00182⟩. ⟨hal-02992176⟩
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