Researchers at the Laboratoire Léon Brillouin (CEA-CNRS), Univ. Paris-Saclay have demonstrated that ordinary liquids can emit a modulated hot and cold thermal signal upon applied mechanical shear wave (Figure below). It tells that the mechanical energy is not dissipated but converted in local thermodynamic states. Prof. Laurence Noirez together with her student Eni Kume (ESR 5) thus identified the equivalent of the thermo-elasticity which was known in solids only.
These experimental advances are utmost important for liquid theories and microfluidics, and open the way to a new generation of energy-efficient temperature converters. View the article