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-2 | Engels |
|---|---|
| Artikelnummer | 118929 |
| Aantal pagina's | 14 |
| Tijdschrift | International Journal of Heat and Mass Transfer |
| Volume | 147 |
| DOI's | |
| Status | Gepubliceerd - 1 feb 2020 |
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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 tijdschrift › Tijdschriftartikel › Academic › peer review
TY - JOUR
T1 - Effect of wall stiffness, mass and potential interaction strength on heat transfer characteristics of nanoscale-confined gas
AU - Rabani, Reza
AU - Heidarinejad, Ghassem
AU - Harting, Jens
AU - Shirani, Ebrahim
PY - 2020/2/1
Y1 - 2020/2/1
N2 - 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.
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
KW - Effective thermal conductivity
KW - Metal
KW - Temperature profile
KW - Wall force field
UR - http://www.scopus.com/inward/record.url?scp=85074270358&partnerID=8YFLogxK
U2 - 10.1016/j.ijheatmasstransfer.2019.118929
DO - 10.1016/j.ijheatmasstransfer.2019.118929
M3 - Article
AN - SCOPUS:85074270358
VL - 147
JO - International Journal of Heat and Mass Transfer
JF - International Journal of Heat and Mass Transfer
SN - 0017-9310
M1 - 118929
ER -