Knowledge Management System Of Guangzhou Institute of Energy Conversion, CAS
| Molecular dynamics simulation of liquid argon flow at platinum surfaces | |
| Xu, JL; Zhou, ZQ | |
| 2004-09-01 | |
| Source Publication | HEAT AND MASS TRANSFER
 |
| Volume | 40Issue:11Pages:859-869 |
| Abstract | The micro Poiseuille flow for liquid argon flowing in a nanoscale channel formed by two solid walls was studied in the present paper. The solid wall material was selected as platinum, which has well established interaction potential. We consider the intermolecular force not only among the liquid argon molecules, but also between the liquid argon atoms and the solid wall particles, therefore three regions, i.e. the liquid argon computation domain, the top and bottom solid wall regions are included for the force interaction. The present MD (Molecular Dynamics) simulation was performed without any assumptions at the wall surface. The objective of the study is to find how the flow and the slip boundaries at the wall surface are affected by the applied gravity force, or the shear rate. The MD simulations are performed in a non-dimensional unit system, with the periodic boundary conditions applied except in the channel height direction. Once the steady state is reached, the macroscopic parameters are evaluated using the statistical mechanics approach. For all the cases tested numerically in the present paper, slip boundaries occur, and such slip velocity at the stationary wall surface increases with increasing the applied gravity force, or the shear rate. The slip length, which is defined as the distance that the liquid particles shall travel beyond the wall surfaces to reach the same velocity as the wall surface, sharply decreases at small shear rate, then slightly decreases with increasing the applied shear rate. We observe that the liquid viscosity remains nearly constant at small shear rates, and the Newtonian flow occurs. However, with increasing the shear rate, the viscosity increases and the non-Newtonian flow appears. |
| Subtype | Article |
| Keyword | Molecular Dynamics Simulation Poiseuille Flow Velocity Profile Slip Length Viscosity |
| WOS Headings | Science & Technology ; Physical Sciences ; Technology |
| DOI | 10.1007/s00231-003-0483-3 |
| WOS Subject Extended | Thermodynamics ; Mechanics |
| WOS Keyword | SOLID-SURFACES ; THIN-FILMS ; SHEAR |
| Indexed By | SCI |
| Language | 英语 |
| WOS Subject | Thermodynamics ; Mechanics |
| WOS ID | WOS:000224513300006 |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.giec.ac.cn/handle/344007/10477 |
| Collection | 中国科学院广州能源研究所 |
| Affiliation | Chinese Acad Sci, Guangzhou Inst Energy Convers, Guangzhou 510070, Peoples R China |
| Recommended Citation GB/T 7714 | Xu, JL,Zhou, ZQ. Molecular dynamics simulation of liquid argon flow at platinum surfaces[J]. HEAT AND MASS TRANSFER,2004,40(11):859-869. |
| APA | Xu, JL,&Zhou, ZQ.(2004).Molecular dynamics simulation of liquid argon flow at platinum surfaces.HEAT AND MASS TRANSFER,40(11),859-869. |
| MLA | Xu, JL,et al."Molecular dynamics simulation of liquid argon flow at platinum surfaces".HEAT AND MASS TRANSFER 40.11(2004):859-869. |
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