THEORETICAL APPROACH ON THE STUDY OF TURBULENT WATER FLOW OVER SMOOTH AND L-SHAPED RIBLETS SURFACES

  • A. BRIMA Department of Mechanics, University of Biskra, Algeria Research laboratory in Mechanical Engineering
  • R. ATMANI Department of Mechanics, University of Biskra, Algeria Research laboratory in Mechanical Engineering
  • B. ACHOUR Department of Hydraulics, University of Biskra, Algeria Research laboratory in Subterranean and surface Hydraulics (LARHYSS)

Résumé

A very important research effort has been developed at many world laboratories these last years in order to reduce the friction
drag. For the aircraft and the submarine applications, friction contributes respectively for about 50% and 70% of the total
resistance. The use of surface modifications riblets as a means of reducing viscous drag on a body has potential aerodynamic
and hydrodynamic applications. In the present study, the theoretical approach allow to determine the velocity field, the wall
shear stress, the local skin friction, the boundary layer thickness, the laminar sub layer thickness and the dimensionless drag
coefficient. The results found, indicate that the presence of L-shaped riblets surfaces provide changes in the characteristics of
the turbulent boundary layer, which are in favor of wall skin friction.

 

Un effort très important a été fourni ces dernières années à travers les laboratoires du monde dans le domaine de la réduction
de traînée visqueuse. Pour les avions de transport et les sous marins, la traînée visqueuse contribue respectivement d’environ
50% à 70% de la résistance totale. L’utilisation des modifications au niveau de la surface est un moyen efficace pour réduire la
traînée visqueuse dans les applications aérodynamique et hydrodynamique. Dans cette étude, l’approche théorique permis de
déterminer le champ de vitesse, la contrainte de cisaillement à la paroi, le coefficient de frottement local, l’épaisseur de la
couche limite, l’épaisseur de la sous couche visqueuse et finalement le coefficient non dimensionnel de traînée sont
représentés. Les résultats trouvés ont montré que la présence des rainures en lames " L " fournie des changements dans les
caractéristiques de la couche limite turbulente, qui sont en faveur du coefficient de frottement pariétal.

Références

[1] Walsh, M.J and Weinstein, L.M., Drag and heat
transfer on surfaces with small longitudinal fins, 1978,
AIAA paper, 78-1161.
[2] Chernychov, O.B and Zayets, V.A., Some peculiarities
of the structure of the skin of sharks. In Hydrodynamic
Problems of Bionics (in Russian), 1970, 4, 77-83.
[3] Liu, K.N., Christodoulou, C., Reccius, O and Joseph,
D.D., Drag reduction in pipes lined with riblets, AIAA
Journal,1990, Vol.28, No.10, pp.1697-1699.
[4] Vukoslavecevic, P., Wallace, J.M and Balint, J.L.,
Viscous drag reduction using stream wise aligned
riblets. AIAA Journal, 1992, 30,1119-1122.
[5] Choi, H., Moin, P and Kim, J., Direct numerical
simulation of turbulent flow over riblets. Journal of
fluid mechanics, 1993, 255, 503-539.
[6] Benhalilou,
M.,
Anselmet,
F
and
Fulachier,
L.,
Conditional
Reynolds
stress
on
a
V-grooved
surface.Physics of fluids, 1994, 6, 2101-2117.
[7] Djenidi,
L
and
Antonia,
R.A.,
Laser
Doppler
Anemometer
measurements
of
turbulent
boundary
layer over a riblets surfaces. AIAA Journal, 1996, 34,
1007-1012.
[8] Dubief, Y., Djenidi, L and Antonia, R.A., The
measurement of du/dy in a turbulent boundary layer
over a riblet surface. International Journal Heat and
fluid flow, 1997, 18, 183-187.
[9] Bechert, D.W., Bruse, M and Hage, W., Experiments
with three dimensional riblets an idealized model of
shark skin. Experiments in fluids, 2000, 28, 403-412.
[10] Lee, S.J and Lee, S.H., Flow field analysis of a
turbulent
boundary
layer
over
a
riblets
surface.
Experiments in fluids, 2001, 30, 153-166.
[11] Coustols, E., Effet des parois rainurées ("riblets") sur
la structure d'une couche limite turbulente. Revue
française de Mécanique, 2001, 4,421-434.
[12] Viswanath, P.R., Aircraft viscous drag reduction using
riblets. Progress in Aerospace Sciences, 2002, 38,571-
600.
[13] Stalio, E. and Nobile, E., Direct numerical simulation
of heat transfer over riblets. International Journal of
Heat and Fluid Flow, 2003, 24, 356-371.
[14] Brima, A. and Atmani, R., Analyse de l'influence de la
modification de la géométrie de paroi "riblets" sur la
réduction de traînée. Séminaire International sur la
physique
énergétique
SIPE’7’,
Université
Bechar
Algérie, 03-05 Octobre 2004.
[15] Janna,
W.S.,
(3rd
edition),
Introduction
to
fluid
mechanics (Boston, PWS publishing), 1994.
[16] Holman, J.P., (7th edition), Heat transfer, New York,
McGraw-Hill, 1994.
Theoretical approach on the study of turbulent water flow over smooth and L-shaped riblets surfaces

123
[17] Schlichting, H., (7th edition), Boundary layer theory,
New York, McGraw-Hill, 1979.
[18] Wang, J.J., Lan, S.L and Chen, G., Experimental study
on the turbulent boundary layer flow over riblets
surface. Fluid Dynamics Research, 2000, 27, 217-229.
[19] Brima, A., Atmani, R., and Achour, B., A Theoretical
Study of Turbulent Water Flow Over Smooth and "V"
Riblets Surfaces. Third international Conference on
water Resources in Mediterranean Basin, WATMED3,
Tripoli-Lebanon, 01-03 November 2006.
Comment citer
BRIMA, A.; ATMANI, R.; ACHOUR, B.. THEORETICAL APPROACH ON THE STUDY OF TURBULENT WATER FLOW OVER SMOOTH AND L-SHAPED RIBLETS SURFACES. Courrier du Savoir, [S.l.], v. 8, mai 2014. ISSN 1112-3338. Disponible à l'adresse : >http://revues.univ-biskra.dz/index.php/cds/article/view/521>. Date de consultation : 15 jui. 2020
Rubrique
Articles