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Fluid flow and heat transfer in a microstructure may depart from the traditional behavior due to the scale effect, and its velocity slip and temperature jump will occur at the fluid-solid interface. A molecular dynamics model of coupled fluid flow and heat transfer in rough nanochannels is developed to investigate the effect of surface roughness on nanoscale fluid flow and heat transfer, as well as velocity slip and temperature jump at the fluid-solid interface. The fluid microscopic structure, velocity and temperature distributions, interfacial velocity slip and temperature jump in a rough nanochannel are evaluated and compared with the corresponding smooth nanochannel. Effects of solid-liquid interaction and wall stiffness on the velocity slip and temperature jump are analyzed. Results indicate that the velocity of the fluid flow under an external force in a nanochannel in a bulk region is of a parabolic distribution, and the viscous dissipation due to shear flow induces the fourth-order temperature profile in the nanochannel. And the velocity slip and temperature jump will occur at the fluid-solid interface. The presence of roughness may introduce an extra viscous dissipation in shear flow, leading to a reduction of overall velocity and an increase in temperature in the nanochannel when compared with the smooth nanochannel. In addition, the degree of velocity slip and temperature jump at a rough liquid-solid interface is smaller than that at a smooth interface. In particular, the increase in fluid-solid interaction strength and reduction in wall stiffness will lead to a small velocity slip and temperature jump.
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Keywords:
- velocity slip /
- temperature jump /
- fluid-solid interface /
- roughness
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[57] [58] [59] Priezjev N V 2007 J. Chem. Phys. 127 144708
[60] Thompson P A, Robbins M O 1990 Phys. Rev. A 41 6830
[61] -
[1] Darhuber A A, Troian S M 2005 Annu. Rev. Fluid Mech. 37 425
[2] Cracknell R F, Nicholson D, Quirke N 1995 Phys. Rev. Lett. 74 2463
[3] [4] [5] Akhmatskaya B, Todd D, Daivis P J, Evans D J, Gubbins, K E, Pozhar L A 1997 J. Chem. Phys. 106 4684
[6] [7] Megahed A M 2013 Chin. Phys. B 22 094701
[8] [9] Sun D K, Xiang N, Jiang D, Chen K, Yi H, Ni Z H 2013 Chin. Phys. B 22 114704
[10] Chen Y Y, Yi H H, Li H B 2008 Chin. Phys. Lett. 25 184
[11] [12] [13] Huang Q G, Pan G, Song B W 2014 Acta Phys. Sin. 63 054701 (in Chinese) [黄桥高, 潘光, 宋保维 2014 物理学报 63 054701]
[14] Chen Y P, Zhang C B, Shi M H, Peterson G P 2012 Appl. Phys. Lett. 100 074102
[15] [16] [17] Yan H, Zhang W M, Hu K M, Liu Y, Meng G 2013 Acta Phys. Sin. 62 174701 (in Chinese) [闫寒, 张文明, 胡开明, 刘岩, 孟光 2013 物理学报 62 174701]
[18] [19] Xie H, Liu C, Liu B W 2009 Acta Phys.-Chim. Sin. 25 994 (in Chinese) [解辉, 刘朝, 刘彬武 2009 物理化学学报 25 994]
[20] [21] Ohara T, Torii D 2005 J. Chem. Phys. 122 214717
[22] [23] Thompson P A, Troian S M 1997 Nature 389 360
[24] Cieplak M, Koplik J, Banavar J R 2001 Phys. Rev. L 86 803
[25] [26] Barrat J L, Bocquet L 1999 Phys. Rev. L 82 4671
[27] [28] [29] Pahlavan A A, Freund J B 2011 Phys. Rev. E 83 021602
[30] Nagayama G, Cheng P 2004 Int. J. Heat Mass Transf. 47 501
[31] [32] [33] Kim B H, Beskok A, Cagin T 2008 Microfluid Nanofluid 5 551
[34] [35] Liu C, Fan H B, Zhang K, Yuen M M F, Li Z G 2010 J. Chem. Phys. 132 094703
[36] Sun J, Wang W, Wang H S 2013 J. Chem. Phys. 138 234703
[37] [38] Sun J, Wang W, Wang H S 2013 Phys. Rev. E 87 023020
[39] [40] Priezjev N V 2007 Phys. Rev. E 75 051605
[41] [42] Kim B H, Beskok A, Cagin T 2008 J. Chem. Phys. 129 174701
[43] [44] Li Z G 2009 Phys. Rev. E 79 026312
[45] [46] [47] Soong C Y, Yen T H, Tzeng P Y 2007 Phys. Rev. E 76 036303
[48] Niavarani A, Priezjev N V 2008 J. Chem. Phys. 129 144902
[49] [50] [51] Sofos F D, Karakasidis T E, Liakopoulos A 2009 Phys. Rev. E 79 026305
[52] Yang S C 2006 Microfluid Nanofluid 2 501
[53] [54] Schmatko T, Hervet H, Leger L 2006 Langmuir 22 6843
[55] [56] Wang Y, Keblinski P 2011 Appl. Phys. Lett. 99 073112
[57] [58] [59] Priezjev N V 2007 J. Chem. Phys. 127 144708
[60] Thompson P A, Robbins M O 1990 Phys. Rev. A 41 6830
[61]
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