Non-equilibrium molecular dynamics simulation on thermal resonance in a nanogap

Abstract

Recent studies found the quantum fluctuation of Casimir heat transfer across a vacuum gap is induced by resonance in electromagnetic fields between two dielectric solids. In our previous study, we found the phonon heat transfer across a vacuum gap is induced by quasi-Casimir coupling without electromagnetic fields, which is distinct from heat conduction, radiation, near-field radiative heat transfer and Casimir heat transfer. However, the heat transfer across a nanogap including liquid is still an open question. In this study, the thermal resonances in a vacuum nanogap and a nanogap including liquid layers were investigated using classical non-equilibrium molecular dynamics (NEMD) simulations. The atomic vibrational displacements and the VDOSs of the interfacial solid and liquid layers were analyzed to verify the thermal resonance at the interfacial solid and liquid layers.

Wentao Chen

Research Fellow

My research interests include near-field heat transfer, thermal transport at the solid-solid and solid-liquid interface, and molecular dynamics simulation.