Effect of liquid layering at the liquid–solid interface on thermal transport

Xue, Liping; Keblinski, Pawel; Phillpot, Simon R.; Choi, Seok Jin; Eastman, J. A.

doi:10.1016/j.ijheatmasstransfer.2004.05.016

Cited by 423 publications

(188 citation statements)

References 23 publications

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“…Figure 2 presents the averaged number density distribution of the Fe and Ar atoms when both Fe blocks are maintained at 120 K. The figure shows that the fluid atoms adjacent to the solid walls migrate closer toward them due to the Fe-Ar intermolecular interactions to form discrete interfacial layers in agreement with previous investigations. 3,15,17,18,20 The consequent higher Ar atom density at the interface causes a local increase in the interfacial pressure so that the packed fluid layers are quasi-solid-like. Since the fluid is initially a liquidvapor mixture, this inhomogeneous density distribution occurs due to phase segregation.…”

Section: Resultsmentioning

confidence: 99%

“…14 Examples of such MD studies 15 include investigations of heat transfer between simple solid-liquid interfaces 3,16 and of the bonding between liquid and solid atoms. 17 These simulations have been limited to steady state investigations of nanoscale thermal transport across interfaces. 4,6,16,18 Another limitation is that the heat flux is not typically determined in these simulations explicitly but rather a posteriori using the empirical Fourier heat conduction law.…”

Section: Methodsmentioning

confidence: 99%

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Unsteady nanoscale thermal transport across a solid-fluid interface

Balasubramanian

Banerjee

Puri

2008

Journal of Applied Physics

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We simulate unsteady nanoscale thermal transport at a solid-fluid interface by placing cooler liquid-vapor Ar mixtures adjacent to warmer Fe walls. The equilibration of the system towards a uniform overall temperature is investigated using nonequilibrium molecular dynamics simulations from which the heat flux is also determined explicitly. The Ar-Fe intermolecular interactions induce the migration of fluid atoms into quasicrystalline interfacial layers adjacent to the walls, creating vacancies at the migration sites. This induces temperature discontinuities between the solidlike interfaces and their neighboring fluid molecules. The interfacial temperature difference and thus the heat flux decrease as the system equilibrates over time. The averaged interfacial thermal resistance R k,av decreases as the imposed wall temperature T w is increased, as R k,av ϰ T w −4.8 . The simulated temperature evolution deviates from an analytical continuum solution due to the overall system heterogeneity.

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Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Unsteady nanoscale thermal transport across a solid-fluid interface

Balasubramanian

Banerjee

Puri

2008

Journal of Applied Physics

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“…Since phonon transfer in crystalline solid is very effective, such local ordering in the liquid can lead to enhanced heat transport. A recent molecular dynamic simulation by Xue et al 8) confirmed the presence of short-ranged ordering of liquid molecules, but surprisingly observed little or no effect on the thermal conductivity. The third mechanism is related to the nature of heat transport in nano-particles.…”

Section: )mentioning

confidence: 99%

A Theoretical Approach of the Heat Transfer in Nanofluids

Vizureanu¹,

Agop

2007

Mater. Trans.

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Using the fractal space-time theory (scale relativity theory), the dynamics of the fluid/nano-particle interface was analyzed. In the general case, the heat transfer through the interface reproduces a d.c. or an a.c. Josephson effects of thermal type, while in the linear approximation, the standard form of heat transfer is given. Consequently, a negative differential thermal conductance appears and an increase in of heat transfer in nanofluids results.

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“…Argon is found in the literature, we have assumed that h=0.2 nm, which is of the order of magnitude of the Van der Waals radius of Ar, which, by the way, lies within the range of values proposed for other fluids [44][45][46][47][48][49].…”

Section: Nanoparticles Dispersed In Liquid Armentioning

confidence: 99%

A thermodynamic model of nanofluid viscosity based on a generalized Maxwell-type constitutive equation

Lebon

Machrafi

2018

Journal of Non-Newtonian Fluid Mechanics

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An original study of nanofluid viscosity is proposed. The carrier fluid is assumed Newtonian but the two-phase nanofluid displays properties typical of a generalized Maxwell constitutive law. Our approach is based on an extension of Einstein's model describing suspensions of solid particles in fluids by the introduction of the following elements: presence of a layer around the nanoparticles and a thermodynamic description of the role of size effects. The theoretical formalism is applied to liquid argon with lithium nanoparticles and to alumina nanoparticles in water. Good agreement with experimental data and molecular dynamics simulation is observed.

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Effect of liquid layering at the liquid–solid interface on thermal transport

Cited by 423 publications

References 23 publications

Unsteady nanoscale thermal transport across a solid-fluid interface

Unsteady nanoscale thermal transport across a solid-fluid interface

A Theoretical Approach of the Heat Transfer in Nanofluids

A thermodynamic model of nanofluid viscosity based on a generalized Maxwell-type constitutive equation

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