Molecular dynamics study of convective heat transfer in ordered rough nanochannels

Song, Zhao; Cui, Zheng; Cao, Qun; Liu, Yu; Li, Junhui

doi:10.1016/j.molliq.2021.116052

Cited by 10 publications

(3 citation statements)

References 33 publications

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“…[22,30] Then the shape of the surface roughness can be sinusoidal function, triangle and rectangle. [31][32][33] To mimic the experimental sample, [34] we use a rectangular pore on the surface of the YSZ to represent the surface roughness. The pore is described by the depth d and the width w. Here the rectangular pore is used to mimic the roughness of the YSZ surface.…”

Section: Structure and Simulation Detailsmentioning

confidence: 99%

Solid–gas interface thermal conductance for the thermal barrier coating with surface roughness: The confinement effect

Zhao

Jiang²

2022

Chinese Phys. B

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The yttria-stabilized zirconia (YSZ) is a famous thermal barrier coating material to protect hot-end components of the engine. As a characteristic feature of the YSZ, the surface roughness shall play an important role in the interface thermal conductance between the YSZ and gas, considering that the gas is typically at an extremely high temperature. We investigate the effect of the surface roughness on the thermal conductance of the YSZ-gas interface with surface roughness described by nanoscale pores on the surface of the YSZ. We reveal two competitive mechanisms related to the microstructure of the pore, i.e., the actual contact area effect and the confinement effect. The increase of the pore depth will enlarge the actual contact area between the YSZ and gas, leading to the enhancement of the solid-gas interface thermal conductance. In contrast to the positive actual contact area effect, the geometry-induced confinement effect greatly reduces the interface thermal conductance. These findings shall offer some fundamental understandings for the microscopic mechanisms of the YSZ-gas interface thermal conductance.

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Section: Structure and Simulation Detailsmentioning

confidence: 99%

Solid–gas interface thermal conductance for the thermal barrier coating with surface roughness: The confinement effect

Zhao

Jiang²

2022

Chinese Phys. B

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“…The nanoscale heat transfer at the solid-liquid interface can be manipulated by surface wettability, [27][28][29][30] nanostructure, [31][32][33][34][35] surfactant adsorption, [36][37][38] self-assembled monolayer, [39][40][41] atomic surface terminations, 42 nanoparticles, 43 temperature, 44,45 and liquid pressure. 46,47 The thermal conductivity of an ordered liquid layer adjacent to the solid surface increases compared with that of bulk liquid.…”

Section: Introductionmentioning

confidence: 99%

Quasi-Casimir coupling can induce thermal resonance of adsorbed liquid layers in a nanogap

Chen

Nagayama

2022

Phys. Chem. Chem. Phys.

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“…Wang et al [7] probed the effect of wall material properties on the flow behavior and interfacial heat transfer in nanochannel. Song et al [8] studied the effects of nanostructures on convective heat transfer in nanochannel with different periodic sinusoidal structures.…”

Section: Introductionmentioning

confidence: 99%

The influencing mechanism of surface wettability on convective heat transfer in copper nanochannel

Shuting¹,

Yao²,

Wang³

et al. 2022

Preprint

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Molecular dynamics study of convective heat transfer in ordered rough nanochannels

Cited by 10 publications

References 33 publications

Solid–gas interface thermal conductance for the thermal barrier coating with surface roughness: The confinement effect

Solid–gas interface thermal conductance for the thermal barrier coating with surface roughness: The confinement effect

Quasi-Casimir coupling can induce thermal resonance of adsorbed liquid layers in a nanogap

The influencing mechanism of surface wettability on convective heat transfer in copper nanochannel

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