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Highlighting Thermo-Elastic Effects in Confined Fluids

Eni Kume 1 Patrick Baroni 1 Laurence Noirez 1
1 NFMQ - LLB - Nouvelles frontières dans les matériaux quantiques
LLB - UMR 12 - Laboratoire Léon Brillouin : IRAMIS/LLB/NFMQ
Abstract : The recent identification of a finite shear elasticity in mesoscopic fluids has motivated the search of other solid-like properties of liquids. We present an innovative thermal approach of liquids. We identify a dynamic thermo-elastic mesoscopic behavior by building the thermal image produced by different liquids upon applying a low frequency mechanical shear field. We selected three fluids: a low molecular weight polybutylacrylate (PBuA), polypropyleneglycol (PPG), and glycerol. We demonstrate that a part of the energy of the shear strain is converted in cold and hot shear bands varying synchronously with the applied shear field. This thermodynamic change suggests a coupling to shear elastic modes in agreement with the low frequency shear elasticity theoretically foreseen and experimentally demonstrated.
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https://hal.archives-ouvertes.fr/hal-03292895
Contributor : Laurence Noirez <>
Submitted on : Tuesday, July 20, 2021 - 4:24:05 PM
Last modification on : Monday, July 26, 2021 - 10:51:00 PM

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Eni Kume, Patrick Baroni, Laurence Noirez. Highlighting Thermo-Elastic Effects in Confined Fluids. Polymers, MDPI, 2021, ⟨10.3390/polym13142378⟩. ⟨hal-03292895⟩

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