1-18 of 18
Keywords: rough surfaces
Close
Follow your search
Access your saved searches in your account

Would you like to receive an alert when new items match your search?
Close Modal
Sort by
Journal Articles
Publisher: ASME
Article Type: Research Papers
J. Fluids Eng. April 2010, 132(4): 041203.
Published Online: April 20, 2010
...Karen A. Flack; Michael P. Schultz A review of predictive methods used to determine the frictional drag on a rough surface is presented. These methods utilize a wide range of roughness scales, including roughness height, pitch, density, and shape parameters. Most of these scales were developed...
Journal Articles
Publisher: ASME
Article Type: Research Papers
J. Fluids Eng. June 2009, 131(6): 061205.
Published Online: May 15, 2009
... (of angles 2 deg and 3 deg) installed on the bottom wall of a plane channel. The experiments were conducted over a smooth surface and over transitionally rough and fully rough surfaces produced from sand grains and gravel of nominal mean diameters 1.55 mm and 4.22 mm, respectively. The dimensionless...
Journal Articles
Publisher: ASME
Article Type: Research Papers
J. Fluids Eng. June 2009, 131(6): 061203.
Published Online: May 13, 2009
...@uludag.edu.tr 07 07 2008 24 03 2009 13 05 2009 boundary layer turbulence channel flow friction pipe flow rough surfaces friction factor turbulent flows boundary layers mathematical modeling Proper description of mean turbulent velocity profiles...
Journal Articles
Publisher: ASME
Article Type: Technical Papers
J. Fluids Eng. August 2007, 129(8): 1083–1100.
Published Online: March 4, 2007
... Reynolds number. The velocity distribution, just above the roughness level, turns out to be a universal relationship for all kinds of roughness (transitional, fully smooth, and fully rough surfaces), but depends implicitly on roughness scale. The open turbulent boundary layer equations, without any closure...
Journal Articles
Publisher: ASME
Article Type: Technical Papers
J. Fluids Eng. March 2007, 129(3): 325–332.
Published Online: August 29, 2006
...A. S. Ziarani; A. A. Mohamad A molecular dynamics simulation of flow over two side-by-side cylinders with atomically rough surfaces is presented. The model is two-dimensional with 3 × 10 5 liquid argon atoms. The surface roughness is constructed by external protrusion of atoms on the surface...
Journal Articles
Journal Articles
Publisher: ASME
Article Type: Technical Papers
J. Fluids Eng. September 2003, 125(5): 871–879.
Published Online: October 7, 2003
.... 12 Sep 2002 22 Apr 2003 07 10 2003 channel flow rough surfaces microfluidics velocity A lab-on-a-chip device is a miniaturized laboratory on a chip consisting of a network of microchannels. Precise manipulation of biological liquids is key to the performance...
Journal Articles
Publisher: ASME
Article Type: Technical Papers
J. Fluids Eng. July 2003, 125(4): 636–642.
Published Online: August 27, 2003
.... This gives C = B = 5.5 . When a rough wall is considered and modeled by a virtual porous plane surface, the same method may be applied, but the right-hand side of Eq. ( 16 ) has to be matched with the logarithmic law corresponding to rough surfaces. In this case, we obtain (17) C = B...
Journal Articles
Publisher: ASME
Article Type: Technical Papers
J. Fluids Eng. July 2003, 125(4): 652–659.
Published Online: August 27, 2003
... March 2002 18 March 2003 27 08 2003 rough surfaces two-phase flow cavitation pipe flow pressure measurement flow visualisation The purpose of this work is to describe the two-phase flow structure of sheet cavitation. Cavitation is a sequence of vaporisation...
Journal Articles
Publisher: ASME
Article Type: Technical Papers
J. Fluids Eng. July 2003, 125(4): 670–679.
Published Online: August 27, 2003
... 4, 2003. Associate Editors: Tsujimoto. 23 July 2002 04 February 2003 27 08 2003 rough surfaces pumps pipe flow laminar to turbulent transitions turbulence As with the flow in a pipe or over a flat plate, energy losses in turbomachinery depend on Reynolds number...
Journal Articles
Publisher: ASME
Article Type: Technical Papers
J. Fluids Eng. January 2003, 125(1): 2–9.
Published Online: January 22, 2003
... turbulence rough surfaces flow simulation drag Turbulent flow over rough surfaces is hardly a new research topic. Nikuradse 1 experimented on sandgrain roughness in 1933. Subsequently, numerous experimental studies have been conducted to understand flow phenomena associated with different types...
Journal Articles
Publisher: ASME
Article Type: Technical Papers
J. Fluids Eng. September 2002, 124(3): 664–670.
Published Online: August 19, 2002
... Division May 23, 2000; revised manuscript received January 30, 2002. Associate Editor: D. R. Williams. 23 May 2000 30 January 2002 19 08 2002 boundary layer turbulence rough surfaces velocity measurement drag Turbulent boundary layers continue to be the subject of both...
Journal Articles
Publisher: ASME
Article Type: Additional Technical Papers
J. Fluids Eng. June 2002, 124(2): 492–499.
Published Online: May 28, 2002
... for ( a ) the unsanded specimen, ( b ) the 60-grit specimen, ( c ) the 120-grit specimen, and ( d ) the 220-grit specimen. (Uncertainty in the y-direction ±1 μm, x - and z -directions ±5 μm) The quantitative statistics of the roughness surfaces are given in Table 1 . The results are presented...
Journal Articles
Publisher: ASME
Article Type: Technical Papers
J. Fluids Eng. March 2002, 124(1): 127–135.
Published Online: October 15, 2001
... for smooth-wall. Vertical and longitudinal turbulent flux of the shear stress on both smooth and rough surfaces is compared to those predicted by a turbulence model. The present results confirm that any turbulence model must take into account the effects of the surface roughness. Contributed...
Journal Articles
Publisher: ASME
Article Type: Technical Papers
J. Fluids Eng. March 2002, 124(1): 108–117.
Published Online: August 8, 2001
... transitions laser Doppler anemometry boundary layers fluctuations rough surfaces Laminar-to-turbulent flow transition is a phenomenon which continues to be of interest to fluid mechanics scholars. In many technical applications, laminary boundary layers are induced, by roughnesses, to undergo...
Journal Articles
Publisher: ASME
Article Type: Technical Papers
J. Fluids Eng. March 2001, 123(1): 16–21.
Published Online: November 17, 2000
...P. A. Durbin; G. Medic; J.-M. Seo; J. K. Eaton; S. Song A formulation is developed to apply the two-layer k − ε model to rough surfaces. The approach involves modifying the l ν formula and the boundary condition on k . A hydrodynamic roughness length is introduced and related to the geometrical...
Journal Articles
Publisher: ASME
Article Type: Technical Papers
J. Fluids Eng. September 2000, 122(3): 533–541.
Published Online: February 14, 2000
... anemometer in shallow flows for three different types of rough surface, as well as a hydraulically smooth surface. The flow Reynolds number based on the boundary layer momentum thickness ranged from 1400 to 4000. The boundary layer thickness was comparable with the depth of flow and the turbulence intensity...
Journal Articles
Publisher: ASME
Article Type: Technical Papers
J. Fluids Eng. June 2000, 122(2): 357–363.
Published Online: February 8, 2000
... Control at Florida Institute of Technology for measuring the surface profiles of the sandgrain rough surfaces. I also gratefully acknowledge Prof. P. Bradshaw, Prof. K. Flack, and Prof. C. Subramanian for reviewing drafts of this manuscript and providing many useful suggestions. B = log-law...