The characteristics of thermal energy and momentum transfer across solid-liquid (S-L) interfaces between Face Centered Cubic (FCC) latice and simple liquid

Mohamad Zin, Mohamad Danial Aiman (2019) The characteristics of thermal energy and momentum transfer across solid-liquid (S-L) interfaces between Face Centered Cubic (FCC) latice and simple liquid. Project Report. Universiti Teknikal Malaysia Melaka, Melaka, Malaysia. (Submitted)

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Abstract

The transfer of thermal energy and momentum over the solid-liquid (S-L) interface for alkanes liquid, which are typical liquids applied for lubrication, contacting gold (Au) having the Face-Centered Cubic (FCC) structure with two types of crystal planes, (100) and (111) were examined using Non Equilibrium Molecular Dynamics (NEMD) simulations. The influence of the lattice-scale roughness of the solid surface was determined. Two configurations consists of shear system and non-shear system were made. The non-shear system was applied with constant heat flux and different temperatures between two sides of solid walls and liquid alkanes. The two parallel solid walls sliding at a constant speed and in opposite directions caused viscous heating to occur on the liquid for the shear system. The surface layer of solid atoms and first absorption layer was analysed. There is a temperature jump on the shear and non-shear system where the temperature jump measured for the non-shear system was seen to be larger than the shear system. For the shear system, the slip length was examined. The slip length was found to be affected by the surface roughness. The thermal boundary resistance was measured for both setup to understand the characteristic of thermal energy transfer. It was found that the shear system and surface structure influenced significantly the thermal energy transfer at S-L interfaces

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