Spectral mapping of heat transfer mechanisms at liquid-solid interfaces

K. Sääskilahti, Jani Oksanen, J. Tulkki, S. Volz

Tutkimustuotos: LehtiartikkeliArticleScientificvertaisarvioitu

35 Sitaatiot (Scopus)
124 Lataukset (Pure)

Abstrakti

Thermal transport through liquid-solid interfaces plays an important role in many chemical and biological processes, and better understanding of liquid-solid energy transfer is expected to enable improving the efficiency of thermally driven applications. We determine the spectral distribution of thermal current at liquid-solid interfaces from nonequilibrium molecular dynamics, delivering a detailed picture of the contributions of different vibrational modes to liquid-solid energy transfer. Our results show that surface modes located at the Brillouin zone edge and polarized along the liquid-solid surface normal play a crucial role in liquid-solid energy transfer. Strong liquid-solid adhesion allows also for the coupling of in-plane polarized modes in the solid with the liquid, enhancing the heat-transfer rate and enabling efficient energy transfer up to the cutoff frequency of the solid. Our results provide fundamental understanding of the energy-transfer mechanisms in liquid-solid systems and enable detailed investigations of energy transfer between, e.g., water and organic molecules.
AlkuperäiskieliEnglanti
Artikkeli052141
Sivut1-8
JulkaisuPhysical Review E
Vuosikerta93
Numero5
DOI - pysyväislinkit
TilaJulkaistu - 24 toukokuuta 2016
OKM-julkaisutyyppiA1 Julkaistu artikkeli, soviteltu

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