Effect of wall stiffness, mass and potential interaction strength on heat transfer characteristics of nanoscale-confined gas

Reza Rabani (Corresponding author), Ghassem Heidarinejad, Jens Harting, Ebrahim Shirani

Onderzoeksoutput: Bijdrage aan tijdschriftTijdschriftartikelAcademicpeer review

Uittreksel

The interactive thermal wall model is applied in three-dimensional molecular dynamics simulations to investigate the combined effect of the wall force field, the wall stiffness, the wall atom mass and the wall/gas interaction potential strength on the heat transfer characteristics of static rarefied argon gas within a nanochannel. By increasing the wall stiffness, a reduction in the heat flux through the gas medium occurs which leads to a higher temperature jump. As the wall atom mass is increased up to twice the argon atom mass, the heat flux is enhanced notably and a minimum temperature jump can be found at this point. Further increase in the wall atom mass results in reducing the heat flux and consequently increasing the temperature jump. The increment of the wall/gas interaction potential strength up to four times the one of gas/gas interactions is shown to enhance the heat flux and to reduce the temperature jump until it eventually vanishes. Furthermore, it is found that under such conditions, the density profile experiences a second peak. A further increase of this parameter is found to have a negligible effect on the heat flux through the gas medium and it only increases the second peak in the density profile.

Originele taal-2Engels
Artikelnummer118929
Aantal pagina's14
TijdschriftInternational Journal of Heat and Mass Transfer
Volume147
DOI's
StatusGepubliceerd - 1 feb 2020

Vingerafdruk

stiffness
Gases
heat transfer
Stiffness
Heat transfer
Heat flux
gases
heat flux
interactions
Atoms
Argon
gas-gas interactions
atoms
Temperature
argon
Molecular dynamics
profiles
field theory (physics)
temperature
Computer simulation

Citeer dit

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title = "Effect of wall stiffness, mass and potential interaction strength on heat transfer characteristics of nanoscale-confined gas",
abstract = "The interactive thermal wall model is applied in three-dimensional molecular dynamics simulations to investigate the combined effect of the wall force field, the wall stiffness, the wall atom mass and the wall/gas interaction potential strength on the heat transfer characteristics of static rarefied argon gas within a nanochannel. By increasing the wall stiffness, a reduction in the heat flux through the gas medium occurs which leads to a higher temperature jump. As the wall atom mass is increased up to twice the argon atom mass, the heat flux is enhanced notably and a minimum temperature jump can be found at this point. Further increase in the wall atom mass results in reducing the heat flux and consequently increasing the temperature jump. The increment of the wall/gas interaction potential strength up to four times the one of gas/gas interactions is shown to enhance the heat flux and to reduce the temperature jump until it eventually vanishes. Furthermore, it is found that under such conditions, the density profile experiences a second peak. A further increase of this parameter is found to have a negligible effect on the heat flux through the gas medium and it only increases the second peak in the density profile.",
keywords = "Density distribution, Effective thermal conductivity, Metal, Temperature profile, Wall force field",
author = "Reza Rabani and Ghassem Heidarinejad and Jens Harting and Ebrahim Shirani",
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Effect of wall stiffness, mass and potential interaction strength on heat transfer characteristics of nanoscale-confined gas. / Rabani, Reza (Corresponding author); Heidarinejad, Ghassem; Harting, Jens; Shirani, Ebrahim.

In: International Journal of Heat and Mass Transfer, Vol. 147, 118929, 01.02.2020.

Onderzoeksoutput: Bijdrage aan tijdschriftTijdschriftartikelAcademicpeer review

TY - JOUR

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AU - Rabani, Reza

AU - Heidarinejad, Ghassem

AU - Harting, Jens

AU - Shirani, Ebrahim

PY - 2020/2/1

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AB - The interactive thermal wall model is applied in three-dimensional molecular dynamics simulations to investigate the combined effect of the wall force field, the wall stiffness, the wall atom mass and the wall/gas interaction potential strength on the heat transfer characteristics of static rarefied argon gas within a nanochannel. By increasing the wall stiffness, a reduction in the heat flux through the gas medium occurs which leads to a higher temperature jump. As the wall atom mass is increased up to twice the argon atom mass, the heat flux is enhanced notably and a minimum temperature jump can be found at this point. Further increase in the wall atom mass results in reducing the heat flux and consequently increasing the temperature jump. The increment of the wall/gas interaction potential strength up to four times the one of gas/gas interactions is shown to enhance the heat flux and to reduce the temperature jump until it eventually vanishes. Furthermore, it is found that under such conditions, the density profile experiences a second peak. A further increase of this parameter is found to have a negligible effect on the heat flux through the gas medium and it only increases the second peak in the density profile.

KW - Density distribution

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KW - Wall force field

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