A survivorship bias in rheometry masks solid-like transverse correlations and longitudinal thermal waves in confined liquids
Abstract
Our perspective on liquids and temperature is often shaped by what we have learned, and we cannot imagine that other possibilities exist. The present experimental results on blood plasma illustrate nicely the importance of revisiting daily used rheometry on a detailed analysis of the low frequency shear stress wave and by associating a thermal study. Previous experiments have shown that fluids like glycerol, water exhibit shear elasticity at sub-millimeter scale. This solid-like property is also demonstrated by the ability to convert the mechanical energy in an adiabatic thermal breath synchronized with the applied shear wave. Here, we show that the physiological fluid confined between wetting plates sustains also shear and thermal waves. At large shear strain amplitudes, the analysis of the thermal signal reveals a clear emergence of thermal zones, aligned along the axis longitudinal to the motion. The emergence of cold and hot waves breathing at the same frequency as the applied shear strain is compatible with an adiabatic dilatation and compression process. A volumetric deformation associated with a thermal change suggests an elastic-like mechanism of the blood plasma relying on acoustic thermal waves along the deformation axis.
K. Trachenko expressed it perfectly in the following citation:
"Things have proceeded fast in the last decade, and we learned new insights about liquids. This includes their ability to sustain solidlike transverse stress and phonons as demonstrated in small-scale experiments. This, in turn, has a promise that we can start understanding liquids on the basis of collective excitations as in solids."
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BibTeX
@misc{noirez2026survivorship,
title = {{A survivorship bias in rheometry masks solid-like transverse correlations and longitudinal thermal waves in confined liquids}},
author = {Laurence Noirez},
howpublished = {HAL},
year = {2026},
month = oct,
url = {https://hal.science/hal-05777127v1},
note = {CC BY-NC-ND 4.0},
}
RIS
TY - UNPB
TI - A survivorship bias in rheometry masks solid-like transverse correlations and longitudinal thermal waves in confined liquids
AU - Laurence Noirez
PY - 2026
DA - 2026/10/04
PB - HAL
UR - https://hal.science/hal-05777127v1
AB - Our perspective on liquids and temperature is often shaped by what we have learned, and we cannot imagine that other possibilities exist. The present experimental results on blood plasma illustrate nicely the importance of revisiting daily used rheometry on a detailed analysis of the low frequency shear stress wave and by associating a thermal study. Previous experiments have shown that fluids like glycerol, water exhibit shear elasticity at sub-millimeter scale. This solid-like property is also demonstrated by the ability to convert the mechanical energy in an adiabatic thermal breath synchronized with the applied shear wave. Here, we show that the physiological fluid confined between wetting plates sustains also shear and thermal waves. At large shear strain amplitudes, the analysis of the thermal signal reveals a clear emergence of thermal zones, aligned along the axis longitudinal to the motion. The emergence of cold and hot waves breathing at the same frequency as the applied shear strain is compatible with an adiabatic dilatation and compression process. A volumetric deformation associated with a thermal change suggests an elastic-like mechanism of the blood plasma relying on acoustic thermal waves along the deformation axis. K. Trachenko expressed it perfectly in the following citation: "Things have proceeded fast in the last decade, and we learned new insights about liquids. This includes their ability to sustain solidlike transverse stress and phonons as demonstrated in small-scale experiments. This, in turn, has a promise that we can start understanding liquids on the basis of collective excitations as in solids."
ER -