Exploring the significance of interfacial molecular interactions on the specific heat, thermal conductivity and dynamic viscosity of nanofluids - Archive ouverte HAL Accéder directement au contenu
Communication Dans Un Congrès Année : 2021

Exploring the significance of interfacial molecular interactions on the specific heat, thermal conductivity and dynamic viscosity of nanofluids

Iván Carrillo-Berdugo
  • Fonction : Auteur
Paloma Martínez-Merino
  • Fonction : Auteur
Ricardo Grau-Crespo
  • Fonction : Auteur
David Zorrilla
  • Fonction : Auteur
Javier Navas
  • Fonction : Auteur
  • PersonId : 1044991

Résumé

An optimal use of heat transfer nanofluids in systems for energy conversion and storage requires proper understanding on why the physical properties of the base fluid are modified in presence of nanomaterials. This work aims to rationalise the observed increment in the specific heat, thermal conductivity and dynamic viscosity of Pd nanoplate-containing aromatic oil-based nanofluids. Specific heat, thermal conductivity and dynamic viscosity have been characterised as a function of the nanoplate mass fraction and temperature. Maximum enhancements of 17.4% in specific heat and 23.5% in thermal conductivity with negligible change in dynamic viscosity were found. Calculations at the density functional theory level-of-theory reveal strong chemisorption of the base fluid molecules on Pd surfaces. Via molecular dynamics simulations, this layer is demonstrated to be responsible of the improved specific heat and absence of rheological penalty, whereas it hinders heat conduction, for which enhancement the Pd nanoplate is solely responsible.
Fichier non déposé

Dates et versions

hal-03344177 , version 1 (14-09-2021)

Identifiants

  • HAL Id : hal-03344177 , version 1

Citer

Iván Carrillo-Berdugo, Paloma Martínez-Merino, Patrice Estellé, Ricardo Grau-Crespo, David Zorrilla, et al.. Exploring the significance of interfacial molecular interactions on the specific heat, thermal conductivity and dynamic viscosity of nanofluids. ATE HEFAT 2021 - The 15th international conference on heat transfer, fluid mechanics and thermodynamics (HEFAT) and editorial board of applied thermal engineering (ATE), Jul 2021, Virtual, France. pp.1018-1023. ⟨hal-03344177⟩
35 Consultations
0 Téléchargements

Partager

Gmail Facebook X LinkedIn More