Highlighting non-uniform temperatures close to liquid/solid surfaces

The present experimental measurements reveal that similar to external fields such as electric, magnetic, or flow fields, the vicinity of a solid surface can preclude the liquid molecules from relaxing to equilibrium, generating located non-uniform temperatures. The non-uniform temperature zone exten...

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Bibliographic Details
Published in:Applied physics letters 2017-05, Vol.110 (21)
Main Authors: Noirez, L., Baroni, P., Bardeau, J. F.
Format: Article
Language:English
Subjects:
Applied physics
Elasticity
Equipment acquisition planning
Measurement methods
Physics
Solid surfaces
Temperature
Thermistors
Water
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Summary:The present experimental measurements reveal that similar to external fields such as electric, magnetic, or flow fields, the vicinity of a solid surface can preclude the liquid molecules from relaxing to equilibrium, generating located non-uniform temperatures. The non-uniform temperature zone extends up to several millimeters within the liquid with a lower temperature near the solid wall (reaching ΔT = −0.15 °C ± 0.02 °C in the case of liquid water) counterbalanced at larger distances by a temperature rise. These effects highlighted by two independent methods (thermistor measurement and infra-red emissivity) are particularly pronounced for highly wetting surfaces. The scale over which non-uniform temperatures are extended indicates that the effect is assisted by intermolecular interactions, in agreement with recent developments showing that liquids possess finite shear elasticity and theoretical approaches integrating long range correlations.
ISSN:0003-6951
1077-3118
DOI:10.1063/1.4983489