| ISI Web of Knowledge Citation Alert | ||||||||
| ||||||||
Note: Instructions on how to purchase the full text of an article and Help Desk Contact information are at the end of the e-mail. |
| *Record 1 of 1. *Click Here to View Full Record *Order Full Text [ ] |
| Title: Free surface transition and momentum augmentation of liquid flow in Micro/Nano-scale channels with hydrophobic and hydrophilic surfaces |
| Authors: |
| Author Full Names: Budiono; Byun, Doyoung; Nyugen, Vu Dat; Kim, Jihoon; Ko, Han Seo |
| Source: JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY 22 (12): 2554-2562 DEC 2008 |
| Language: English |
| Document Type: Article |
| Author Keywords: Molecular dynamics; Nano channel; Computational fluid dynamics; Micro channel; Flow instability; Hydrophobic surface; Hydrophilic surface |
| KeyWords Plus: MOLECULAR-DYNAMICS SIMULATION; FLUID-SOLID INTERFACE |
| Abstract: We propose a novel micro/nano-scale nozzle structure, featuring an interfacial line between the hydrophilic and the hydrophobic surfaces for a jetting system, Such as an inkjet head or electrospray devices. This research will investigate the impact of the interfacial line on flow instability and momentum all,,mentation as the liquid meniscus moves across the line. The research methods used in this paper, in respect to micro-and nano-scale channels, are computational fluid dynamics (CFD) and non-equilibrium molecular dynamics (MD). respectively. With the growing interest in micro/nano electromechanical systems (MEMS/NEMS), many Studies have been conducted to develop an advanced micro/nanofluidic system. However, until now, there have been few in-depth Studies on passive flow control in micro and nano nozzles using the hydrophilic and hydrophobic surface characteristics. In this research, the sequential arrangement of hydrophilic and hydrophobic surfaces in the nozzle is prese! nted along with an investigation into how flow instability and momentum augmentation are going to be applied to an efficient micro/nano jetting system. When a liquid meniscus arrives at the interfacial line between hydrophilic and hydrophobic Surfaces, the meniscus shape changes from concave to convex and the fluid motion near the wall stops until the concave shape is fully converted. Because the momentum Should be conserved, the lost momentum near the wall transfers to the center region, and therefore the liquid at the center region is accelerated as it crosses the line. If we use this nozzle structure and the augmentation of the momentum near the center, a tiny droplet can be easily generated. |
| Reprint Address: Byun, D, Konkuk Univ, Dept Aerosp & Informat Engn, 1 Hwayang Dong, Seoul 143701, South Korea. |
| Research Institution addresses: [Budiono; Byun, Doyoung; Nyugen, Vu Dat; Kim, Jihoon] Konkuk Univ, Dept Aerosp & Informat Engn, Seoul 143701, South Korea; [Ko, Han Seo] Sungkyunkwan Univ, Sch Mech Engn, Seoul, South Korea |
| E-mail Address: dybyun@konkuk.ac.kr |
| Cited References: BARRAT JL, 1999, PHYS REV LETT, V82, P4671. BYUN DY, 2006, 42 AIAA ASME SAE ASE. CHANG YC, 1996, J COMPUT PHYS, V124, P449. CIEPLAK M, 2001, PHYS REV LETT, V86, P803. CRAIGHEAD HG, 2000, SCIENCE, V290, P1532. FERZIGER JH, 1996, COMPUTATIONAL METHOD. HAILE JM, 1997, MOL DYNAMICS SIMULAT. HIRT CW, 1981, J COMPUT PHYS, V39, P201. KANDLIKAR SG, 2001, P IMECE 01. KOPLIK J, 1989, PHYS FLUIDS A-FLUID, V1, P781. LEE S, 2005, NANOTECH 2005. MARUYAMA S, 2002, THERM SCI ENG, V10, P23. MOSELER M, 2000, SCIENCE, V289, P1165. NAGAYAMA G, 2004, INT J HEAT MASS TRAN, V47, P501, DOI 10.1016/j.ijheatmasstransfer.2003.07.013. NIEMINEN JA, 1992, PHYS REV LETT, V69, P124. PRINZ VY, 2003, MICROELECTRON ENG, V69, P466, DOI 10.1016/S0167-9317(03)00336-8. SHIN H, 2005, NANOTECHNOLOGY, V16, P2838, DOI 10.1088/0957-4484/16/12/018. SON SU, 2006, 6 INT M INF DISPL IN. SQUIRES TM, 2005, REV MOD PHYS, V77, P977. THOMPSON PA, 1997, NATURE, V389, P360. TRAVIS KP, 2000, J CHEM PHYS, V112, P1984. VANDERSPOEL D, 2003, GROMACS USER MANUAL. XU JL, 2004, HEAT MASS TRANSFER, V40, P859, DOI 10.1007/s00231-003-0483-3. |
| Cited Reference Count: 23 |
| Times Cited: 0 |
| Publisher: KOREAN SOC MECHANICAL ENGINEERS; KSTC NEW BLD. 7TH FLOOR, 635-4 YEOKSAM-DONG KANGNAM-KU, SEOUL 135-703, SOUTH KOREA |
| Subject Category: Engineering, Mechanical |
| ISSN: 1738-494X |
| DOI: 10.1007/s12206-008-0751-8 |
| IDS Number: 399YE |
| Order Full Text
| ||||||||||||
| Help Desk Contact Information If you have any questions, please visit the Thomson Scientific Technical Support Contact Information Web page. |
No comments:
Post a Comment