Skip to main content
    • Aa
    • Aa

Turbulence structure in rough- and smooth-wall boundary layers

  • R. J. VOLINO (a1), M. P. SCHULTZ (a2) and K. A. FLACK (a1)

Turbulence measurements for rough-wall boundary layers are presented and compared to those for a smooth wall. The rough-wall experiments were made on a woven mesh surface at Reynolds numbers approximately equal to those for the smooth wall. Fully rough conditions were achieved. The present work focuses on turbulence structure, as documented through spectra of the fluctuating velocity components, swirl strength, and two-point auto- and cross-correlations of the fluctuating velocity and swirl. The present results are in good agreement, both qualitatively and quantitatively, with the turbulence structure for smooth-wall boundary layers documented in the literature. The boundary layer is characterized by packets of hairpin vortices which induce low-speed regions with regular spanwise spacing. The same types of structure are observed for the rough- and smooth-wall flows. When the measured quantities are normalized using outer variables, some differences are observed, but quantitative similarity, in large part, holds. The present results support and help to explain the previously documented outer-region similarity in turbulence statistics between smooth- and rough-wall boundary layers.

Linked references
Hide All

This list contains references from the content that can be linked to their source. For a full set of references and notes please see the PDF or HTML where available.

R. J. Adrian , K. T. Christensen & Z.-C. Liu 2000 aAnalysis and interpretation of instantaneous turbulent velocity fields. Exps. Fluids 29, 275290.

J. C. del Álamo & J. Jiménez 2003 Spectra of the very large anisotropic scales in turbulent channels. Phys. Fluids 15, L41L44.

K. Bhaganagar , J. Kim & G. Coleman 2004 Effect of roughness on wall-bounded turbulence. Flow Turb. Combust. 72, 463492.

M. S. Chong , A. E. Perry & B. J. Cantwell 1990 A general classification of three-dimensional flow fields. Phys. Fluids A 2, 765777.

K. A. Flack , M. P. Schultz & T. A. Shapiro 2005 Experimental support for Townsend's Reynolds number similarity hypothesis on rough walls. Phys. Fluids 17, #035102.

K. A. Flack , M. P. Schultz & J. S. Connelly 2007 Examination of a critical roughness height for boundary layer similarity. Phys. Fluids 19, 095104.

B. Ganapathisubramani , E. K. Longmire & I. Marušić 2006 Experimental investigation of vortex properties in a turbulent boundary layer. Phys. Fluids 18, #055105.

M. Guala , S. E. Hommema & R. J. Adrian 2006 Large-scale and very-large-scale motions in turbulent pipe flow. J. Fluid Mech. 554, 521542.

W. T. Hambleton , N. Hutchins & I. Marušić 2006 Simultaneous orthogonal-plane particle image velocimetry measurements in a turbulent boundary layer. J. Fluid Mech. 560, 5364.

N. Hutchins , W. T. Hambleton & I. Marušić 2005 Inclined cross-stream stereo particle image velocimetry measurements in turbulent boundary layers. J. Fluid Mech. 541, 2154.

J. Jiménez 2004 Turbulent flows over rough walls. Annu. Rev. Fluid Mech. 36, 173196.

G. J. Kunkel & I. Marušić 2006 Study of the near-wall-turbulent region of the high-Reynolds-number boundary layer using an atmospheric flow. J. Fluid Mech. 548, 375402.

S. Leonardi , P. Orlandi , R. J. Smalley , L. Djenidi & R. A. Antonia 2003 Direct numerical simulations of turbulent channel flow with transverse square bars on one wall. J. Fluid Mech. 491, 229238.

I. Marušić 2001 On the role of large-scale structures in wall turbulence. Phys. Fluids 13, 735743.

Y. Na , T. J. Hanratty & Z. Liu 2001 The use of DNS to define stress producing events for turbulent flow over a smooth wall. Flow Turb. Combust. 66, 495512.

S. Nakagawa & T. J. Hanratty 2001 Particle image velocimetry measurements of flow over a wavy wall. Phys. Fluids 13, 35043507.

M. R. Raupach , R. A. Antonia & S. Rajagopalan 1991 Rough-wall boundary layers. Appl. Mech. Rev. 44, 125.

M. A. Shockling , J. J. Allen & A. J. Smits 2006 Roughness effects in turbulent pipe flow. J. Fluid Mech. 564, 267285.

Recommend this journal

Email your librarian or administrator to recommend adding this journal to your organisation's collection.

Journal of Fluid Mechanics
  • ISSN: 0022-1120
  • EISSN: 1469-7645
  • URL: /core/journals/journal-of-fluid-mechanics
Please enter your name
Please enter a valid email address
Who would you like to send this to? *


Full text views

Total number of HTML views: 0
Total number of PDF views: 72 *
Loading metrics...

Abstract views

Total abstract views: 136 *
Loading metrics...

* Views captured on Cambridge Core between September 2016 - 23rd September 2017. This data will be updated every 24 hours.