Numerical modeling and analytical approach were used to compute laminar flows in rough-wall microchannels. Both models considered the same arrangements of rectangular prism rough elements in periodical arrays. The numerical results confirmed that the flow is independent of the Reynolds number in the range 1–200. The analytical model needs only one constant for most geometrical arrangements. It compares well with the numerical results. Moreover, both models are consistent with experimental data. They show that the rough elements drag is mainly responsible for the pressure drop across the channel in the upper part of the relative roughness range.
Issue Section:
Technical Papers
1.
Mala
, G. M.
, and Li
, D.
, 1999, “Flow Characteristics of Water in Microtubes
,” Int. J. Heat Fluid Flow
0142-727X, 20
, pp. 142
–148
.2.
Li
, Z. X.
, Du
, D. X.
, and Guo
, Z. Y.
, 2003, “Experimental Study on Flow Characteristics of Liquid in Circular Microtubes
,” Microscale Thermophys. Eng.
1089-3954, 7
, pp. 253
–265
.3.
Guo
, Z. Y.
, and Li
, Z.
, 2003, “Size Effect on Microscale Single-Phase Flow and Heat Transfer
,” Int. J. Heat Mass Transfer
0017-9310, 46
, pp. 149
–159
.4.
Judy
, J.
, Maynes
, D.
, and Webb
, B. W.
, 2002, “Characterization of Frictional Pressure Drop for Liquid Flows Through Microchannels
,” Int. J. Heat Mass Transfer
0017-9310, 45
, pp. 3477
–3489
5.
Qu
, W.
, Mala
, G. M.
, and Li
, D.
, 2000, “Pressure-Driven Water Flows in Trapezoidal Silicon Microchannels
,” Int. J. Heat Mass Transfer
0017-9310, 43
, pp. 353
–364
.6.
Pfund
, D.
, Rector
, D.
, Shekarriz
, A.
, Popescu
, A.
, and Welty
, J.
, 2000, “Pressure Drop Measurements in a Microchannel
,” AIChE J.
0001-1541, 46
, pp. 1496
–1507
.7.
Bavière
, R.
, Ayela
, F.
, Le Person
, S.
, and Favre-Marinet
, M.
, 2004, “An Experimental Study of Water Flow in Smooth and Rectangular Microchannels
,” Second International Conference on Microchannels and Minichannels, Rochester
, June 2004, S. G.
Kandlikar
ed., ASME
, New York
, pp. 221
–228
.8.
Bavière
, R.
, “Etude de l’Hydrodynamique et des Transferts de Chaleur dans des Microcanaux
,” Ph.D. thesis, UJF Grenoble University, http://tel.ccsd.cnrs. fr/http://tel.ccsd.cnrs. fr/.9.
Koo
, J.
, and Kleinstreuer
, C.
, 2003, “Liquid Flow in Microchannels: Experimental Observations and Computational Analyses of Microfluidic Effects
,” J. Micromech. Microeng.
0960-1317, 13
, pp. 578
–579
.10.
Kleinstreuer
, C.
, and Koo
, J.
, 2004, “Computational Analysis of Wall Roughness Effects for Liquid Flow in Micro-Conduits
,” J. Fluids Eng.
0098-2202, 126
, pp. 1
–9
.11.
Hu
, H.
, Werner
, C.
, and Li
, D.
, 2003, “Influence of Three-Dimensional Roughness on Pressure-Driven Flow Through Microchannels
,” J. Fluids Eng.
0098-2202, 125
, pp. 871
–879
.12.
Taylor
, R. P.
, Coleman
, H. W.
, and Hodge
, B. K.
, 1985, “Prediction of Turbulent Rough-Wall Skin Friction Using a Discrete Element Approach
,” J. Fluids Eng.
0098-2202, 107
, pp. 251
–257
.13.
Roache
, P. J.
, 1997, “Quantification of Uncertainty in Computational Fluid Dynamics
,” Annu. Rev. Fluid Mech.
0066-4189, 29
, pp. 123
–160
.14.
White
, F. M.
, 1991, Viscous Fluid Flow
, McGraw-Hill
, New York
.15.
Sherman
, F. S.
, 1990, Viscous Flow
, McGraw-Hill
, New York
.Copyright © 2006
by American Society of Mechanical Engineers
You do not currently have access to this content.
