Molecular dynamic simulation of platinum heater and associated nano-scale liquid argon film evaporation and colloidal adsorption characteristics

Maroo, Shalabh C.; Chung, J. N.

doi:10.1016/j.jcis.2008.09.018

Cited by 88 publications

(45 citation statements)

References 14 publications

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“…the boundary is adiabatic and elastic in nature. The 'fluid-wall thermal equilibrium model' is used to numerically simulate heat transfer between wall and fluid atoms [10,12]. Equations and parameters implemented are non-dimensional [13].…”

Section: Simulation Modelmentioning

confidence: 99%

“…For argon at 90 K, the threshold number density was obtained as 7 and threshold radius as 0.53 nm i.e. if an argon atom has 7 or more neighboring atoms within a radius of 0.53 nm it is said to be a ''liquid" atom or else a ''vapor" atom [10].…”

Section: Liquid Vs Vapor Atommentioning

confidence: 99%

“…One of the reasons could be that the numerical wall-fluid heat transfer model may not be physically sound. Maroo and Chung [10] recently studied transient phase transition of a thin liquid argon film on a platinum wall. They obtained a non-evaporating film in the process.…”

Section: Introductionmentioning

confidence: 99%

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Heat transfer characteristics and pressure variation in a nanoscale evaporating meniscus

Maroo

Chung

2010

International Journal of Heat and Mass Transfer

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Section: Simulation Modelmentioning

confidence: 99%

Section: Liquid Vs Vapor Atommentioning

confidence: 99%

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Heat transfer characteristics and pressure variation in a nanoscale evaporating meniscus

Maroo

Chung

2010

International Journal of Heat and Mass Transfer

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“…Nagayama et al [4] carried out MD simulations to examine the bubble behavior confined in a nanochannel with emphasis on nucleation phenomenon. Maroo and Chung [5] performed molecular dynamics simulation of platinum heater and associated nano-scale liquid argon film evaporation and colloidal adsorption characteristics. Abovementioned studies are performed to particularly understand the behavior of the heterogeneous phase transition of thin liquid on a flat solid surface.…”

Section: Introductionmentioning

confidence: 99%

Phase Change Characteristics of Ultra-Thin Liquid Argon Film over different Flat Substrates at High Wall Superheat for Hydrophilic/Hydrophobic Wetting Condition: A Non-Equilibrium Molecular Dynamics Study

et al. 2017

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Abstract:Non-equilibrium molecular dynamics simulations have been conducted to understand the effect of solid-liquid interfacial wettability and surface material on the phase change phenomena of the thin liquid argon film placed over flat substrate at high wall superheat. The molecular system consists of a three phase simulation domain involving solid wall, liquid argon and argon vapor. After the system is thermally equilibrated at 90K and kept in equilibrium for a while, a high wall superheat (250K that is far above the critical temperature of argon) is induced at the liquid boundary so that the liquid undergoes ultrafast heating. Both hydrophilic and hydrophobic surfaces were considered in the present study in order to observe the effect of surface wettability on phase change characteristics for three different solid substrate materials namely, Platinum (Pt), Silver (Ag) and Aluminium (Al). Results obtained in the present study are discussed in terms of transient atomic distribution inside system domain, heat flux characteristics across the solid-liquid interface together with evaporative mass flux from liquid argon. Simulation results show that, depending on the surface wetting condition, the phase change process appears to be very different (explosive/ diffusive) for all three substrate materials under consideration. Among three materials considered herein, Al is found to offer the least favourable condition for phase change process while Pt and Ag show similar heat and mass transfer characteristics for both hydrophilic and hydrophobic wetting conditions. Surface wettability effect is found to be more prominent than the effect of substrate material in thin film liquid phase change phenomena.

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“…Morshed et al [5] performed molecular dynamics simulation to study the effect of nanostructures on evaporation and explosive boiling of thin liquid films. Maroo and Chung [6] performed molecular dynamics simulation of platinum heater and associated Nano-scale liquid argon film evaporation and colloidal adsorption characteristics. Seyf and Zhang [7] performed non equilibrium molecular dynamics to study effect of Nano textured array of conical features on explosive boiling over flat substrate.…”

Section: Introductionmentioning

confidence: 99%

Effect of nanostructured surface configuration on evaporation and condensation characteristics of thin film liquid argon in a nano-scale confinement

Kuri

Rakibuzzaman

Sabah

et al. 2017

AIP Conference Proceedings

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Abstract. Molecular dynamics simulation has been carried out to go through the evaporation and condensation characteristics of thin liquid argon film in nanoscale confinement having nanostructured boundary. Nanoscale confinement under consideration consists of hot and cold parallel platinum plates at the bottom and top end of a model cuboid inside which the fluid domain comprised of liquid argon film at the bottom plate and vapor argon in between liquid argon and upper plate of the confinement. Three different confinement configurations have been considered here: (i) Both platinum plates are flat, (ii) Upper plate consisting of transverse slots and (iii) Both plates consisting of transverse slots. The height of the slots is 1.5 nm. Considering hydrophilic nature of top and bottom plates, two different high temperatures of the hot wall was set and an observation was made. For all the structures, equilibrium molecular dynamics (EMD) was performed to reach equilibrium state at 90 K. Then the lower wall is set to two different temperatures like 110 K and 250 K for all three models to perform non-equilibrium molecular dynamics (NEMD). Various system characteristics such as atomic distribution, wall heat flux, evaporative mass flux etc. have been obtained and discussed to have a clear understanding of the effect of nanotextured surface on phase change phenomena.

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Molecular dynamic simulation of platinum heater and associated nano-scale liquid argon film evaporation and colloidal adsorption characteristics

Cited by 88 publications

References 14 publications

Heat transfer characteristics and pressure variation in a nanoscale evaporating meniscus

Heat transfer characteristics and pressure variation in a nanoscale evaporating meniscus

Phase Change Characteristics of Ultra-Thin Liquid Argon Film over different Flat Substrates at High Wall Superheat for Hydrophilic/Hydrophobic Wetting Condition: A Non-Equilibrium Molecular Dynamics Study

Effect of nanostructured surface configuration on evaporation and condensation characteristics of thin film liquid argon in a nano-scale confinement

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