Cited Article: Thompson, P. A general boundary condition for liquid flow at solid surfaces
Alert Expires: 09 NOV 2010
Number of Citing Articles: 2 new records this week (2 in this e-mail)
Organization ID: 3b97d1bbc1878baed0ab183d8b03130b
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Title:
Molecular group dynamics study on slip flow of thin fluid film based on the Hamaker hypotheses
Authors:
Zhou, JF; Shao, CL; Gu, BQ
Author Full Names:
Zhou JianFeng; Shao ChunLei; Gu BoQin
Source:
SCIENCE CHINA-TECHNOLOGICAL SCIENCES 53 (7): 1833-1838 Sp. Iss. SI JUL 2010
Language:
English
Document Type:
Article
Author Keywords:
Hamaker hypotheses; molecular group; velocity slip; Lennard-Jones potential
Abstract:
The thin fluid film was assumed to consist of a number of spherical fluid molecular groups and the attractive forces of molecular group pairs were calculated by the derived equation according to the three Hamaker homogeneous material hypotheses. Regarding each molecular group as a dynamics individual, the simulation method for the shearing motion of multilayer fluid molecular groups, which was initiated by two moving walls, was proposed based on the Verlet velocity iterative algorithm. The simulations reveal that the velocities of fluid molecular groups change about their respective mean velocities within a narrow range in steady state. It is also found that the velocity slips occur at the wall boundary and in a certain number of fluid film layers close to the wall. Because the dimension of molecular group and the number of group layers are not restricted, the hypothetical thickness of fluid film model can be enlarged from nanometer to micron by using the proposed simulation!
method.
Reprint Address:
Zhou, JF, Nanjing Univ Technol, Coll Mech & Power Engn, Nanjing 210009, Peoples R China.
Research Institution addresses:
[Zhou JianFeng; Shao ChunLei; Gu BoQin] Nanjing Univ Technol, Coll Mech & Power Engn, Nanjing 210009, Peoples R China
E-mail Address:
zhoujianfeng_ren@163.com
Cited References:
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Cited Reference Count:
17
Times Cited:
0
Publisher:
SCIENCE CHINA PRESS; 16 DONGHUANGCHENGGEN NORTH ST, BEIJING 100717, PEOPLES R CHINA
Subject Category:
Engineering, Multidisciplinary; Materials Science, Multidisciplinary
ISSN:
1674-7321
DOI:
10.1007/s11431-010-3105-6
IDS Number:
621SZ
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Title:
Evaluation of a lattice Boltzmann method in a complex nanoflow
Authors:
Suga, K; Takenaka, S; Ito, T; Kaneda, M; Kinjo, T; Hyodo, S
Author Full Names:
Suga, K.; Takenaka, S.; Ito, T.; Kaneda, M.; Kinjo, T.; Hyodo, S.
Source:
PHYSICAL REVIEW E 82 (1): Art. No. 016701 Part 1 JUL 6 2010
Language:
English
Document Type:
Article
KeyWords Plus:
HARD-SPHERE MOLECULES; RAREFIED-GAS; BOUNDARY-CONDITIONS; MICROCHANNEL FLOW; SIMULATION; EQUATION; REGIME; TRANSPORT; FLUIDS; MICRO
Abstract:
In order to establish a cost-effective strategy to simulate complex flows in continuum to slip and transitional regimes, the present study assesses the performance of a lattice Boltzmann method (LBM) formerly discussed by the present authors' group [Niu et al., Phys. Rev. E 76, 036711 (2007)]. This LBM is based on a diffuse scattering wall boundary condition, a regularization procedure, and an effective relaxation time associated with the Knudsen number. The present assessment is on its regularization procedure and third-order truncated system based on the two-dimensional twenty-one discrete velocity (D2Q21) model for the Cartesian lattices. The test flow cases are force-driven Poiseuille flows, the Couette flows and a flow around a square cylinder situated in a nanochannel. For producing the reference data of the square cylinder flow, the molecular dynamics simulation using Lennard-Jones potential is also performed. Although the flow profiles and the slip velocities of the !
Poiseuille flows and the Couette flows are more accurately predicted by the third-order truncated system, the general velocity profiles around the square cylinder are also well predicted by the second-order truncated system based on the two-dimensional nine discrete velocity (D2Q9) model. It is also confirmed that without the regularization process, the entire flow field prediction suffers unphysical momentum oscillations around the square cylinder.
Reprint Address:
Suga, K, Osaka Prefecture Univ, Dept Mech Engn, Osaka 5998531, Japan.
Research Institution addresses:
[Suga, K.; Takenaka, S.; Ito, T.; Kaneda, M.] Osaka Prefecture Univ, Dept Mech Engn, Osaka 5998531, Japan; [Kinjo, T.; Hyodo, S.] Toyota Cent Res & Dev Labs Inc, Computat Phys Lab, Aichi 4801192, Japan
E-mail Address:
suga@me.osakafu-u.ac.jp
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Cited Reference Count:
42
Times Cited:
0
Publisher:
AMER PHYSICAL SOC; ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
Subject Category:
Physics, Fluids & Plasmas; Physics, Mathematical
ISSN:
1539-3755
DOI:
10.1103/PhysRevE.82.016701
IDS Number:
621DO
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