| dc.date | 2016 | |
| dc.date | 2016-06-03T20:12:47Z | |
| dc.date | 2016-06-03T20:12:47Z | |
| dc.date.accessioned | 2018-03-29T01:31:58Z | |
| dc.date.available | 2018-03-29T01:31:58Z | |
| dc.identifier | | |
| dc.identifier | Experimental Thermal And Fluid Science. Elsevier Inc., v. 71, p. 95 - 102, 2016. | |
| dc.identifier | 8941777 | |
| dc.identifier | 10.1016/j.expthermflusci.2015.10.017 | |
| dc.identifier | http://www.scopus.com/inward/record.url?eid=2-s2.0-84946017194&partnerID=40&md5=569f0bdbe51c983c8893a21201b01059 | |
| dc.identifier | http://repositorio.unicamp.br/jspui/handle/REPOSIP/237901 | |
| dc.identifier | 2-s2.0-84946017194 | |
| dc.identifier.uri | http://repositorioslatinoamericanos.uchile.cl/handle/2250/1304562 | |
| dc.description | The transport of solid particles by a fluid flow is frequently found in nature and industry. Some examples are the transport of sand in rivers and hydrocarbon pipelines. When the shear stresses exerted by a fluid flow on a granular bed remain moderate, some grains are set in motion without fluidizing the bed; the moving grains form a layer, known as bed load, that moves while maintaining contact with the fixed part of the bed. Under bed load conditions, the granular bed may become unstable, generating ripples and dunes. Sand ripples are commonly observed in closed conduits and pipes such as in petroleum pipelines, sewer systems, and dredging lines. Although of importance for many scientific domains and industrial applications, the formation of ripples in closed conduits is not well understood, and the problem is still open. This paper presents an experimental study on the formation and migration of sand ripples under a turbulent closed-conduit flow and bed-load conditions. In our experiments, fully-developed turbulent water flows were imposed over a granular bed of known granulometry in a transparent channel, and bed load took place. For different water flow rates and grain diameters, the growth and migration of bedforms were filmed by a high-definition camera, and a numerical code was developed to determine the wavelength and celerity of the bedforms from the acquired images. The obtained results are compared with published stability analyses. © 2015 Elsevier Inc. | |
| dc.description | 71 | |
| dc.description | | |
| dc.description | 95 | |
| dc.description | 102 | |
| dc.description | Morelissen, R., Hulscher, S., Knaapen, M., Németh, A., Bijker, R., Mathematical modelling of sand wave migration and the interaction with pipelines (2003) Coast. Eng., 48, pp. 197-209 | |
| dc.description | Bagnold, R.A., (1941) The Physics of Blown Sand and Desert Dunes, , Chapman and Hall | |
| dc.description | Herrmann, H.J., Sauermann, G., The shape of dunes (2000) Physica A, 283, pp. 24-30 | |
| dc.description | Kroy, K., Sauermann, G., Herrmann, H.J., Minimal model for sand dunes (2002) Phys. Rev. Lett., 88, p. 054301 | |
| dc.description | Andreotti, B., Claudin, P., Douady, S., Selection of dune shapes and velocities. Part 1: Dynamics of sand, wind and barchans (2002) Euro. Phys. J. B, 28, pp. 321-329 | |
| dc.description | Elbelrhiti, H., Claudin, P., Andreotti, B., Field evidence for surface-wave-induced instability of sand dunes (2005) Nature, 437, p. 04058 | |
| dc.description | Parteli, E., Andrade, J., Herrmann, H., Transverse instability of dunes (2011) Phys. Rev. Lett., 107, p. 188001 | |
| dc.description | Melo, H., Parteli, E., Andrade, J., Herrmann, H., Linear stability analysis of transverse dunes (2012) Physica A, 391 (20), pp. 4606-4614 | |
| dc.description | Kennedy, J.F., The mechanics of dunes and antidunes in erodible-bed channels (1963) J. Fluid Mech., 16, pp. 521-544 | |
| dc.description | Reynolds, A.J., Waves on the erodible bed of an open channel (1965) J. Fluid Mech., 22, pp. 113-133 | |
| dc.description | Engelund, F., Instability of erodible beds (1970) J. Fluid Mech., 42, pp. 225-244 | |
| dc.description | Fredsoe, J., On the development of dunes in erodible channels (1974) J. Fluid Mech., 64, pp. 1-16 | |
| dc.description | Engelund, F., Fredsoe, J., Sediment ripples and dunes (1982) Ann. Rev. Fluid Mech., 14, pp. 13-37 | |
| dc.description | Richards, K.J., The formation of ripples and dunes on an erodible bed (1980) J. Fluid Mech., 99, pp. 597-618 | |
| dc.description | Charru, F., Selection of the ripple length on a granular bed sheared by a liquid flow (2006) Phys. Fluids, 18, p. 121508 | |
| dc.description | Claudin, P., Andreotti, B., A scaling law for aeolian dunes on Mars, Venus, Earth, and for subaqueous ripples (2006) Earth Plan. Sci. Lett., 252, pp. 20-44 | |
| dc.description | Ouriemi, M., Aussillous, P., Guazzelli, E., Sediment dynamics. Part 2. Dune formation in pipe flow (2009) J. Fluid Mech., 636, pp. 321-336 | |
| dc.description | Jackson, P.S., Hunt, J.C.R., Turbulent wind flow over a low hill (1975) Quart. J. R. Meteorol. Soc., 101, pp. 929-955 | |
| dc.description | Hunt, J.C.R., Leibovich, S., Richards, K.J., Turbulent shear flows over low hills (1988) Quart. J. R. Meteorol. Soc., 114, pp. 1435-1470 | |
| dc.description | Weng, W.S., Hunt, J.C.R., Carruthers, D.J., Warren, A., Wiggs, G.F.S., Livingstone, I., Castro, I., Air flow and sand transport over sand-dunes (1991) Acta Mech., pp. 1-21 | |
| dc.description | Valance, A., Langlois, V., Ripple formation over a sand bed submitted to a laminar shear flow (2005) Eur. Phys. J. B, 43, pp. 283-294 | |
| dc.description | Franklin, E.M., Initial instabilities of a granular bed sheared by a turbulent liquid flow: length-scale determination (2010) J. Braz. Soc. Mech. Sci. Eng., 32 (4), pp. 460-467 | |
| dc.description | Kuru, W.C., Leighton, D.T., McCready, M.J., Formation of waves on a horizontal erodible bed of particles (1995) Int. J. Multiphase Flow, 21 (6), pp. 1123-1140 | |
| dc.description | Coleman, S.E., Fedele, J.J., Garcia, M.H., Closed-conduit bed-form initiation and development (2003) J. Hydraul. Eng., 129 (12), pp. 956-965 | |
| dc.description | Franklin, E.M., Dynamique de dunes isolées dans un écoulement cisaillé (2008), Ph.D. thesis, Université de ToulouseFranklin, E.M., Nonlinear instabilities on a granular bed sheared by a turbulent liquid flow (2011) J. Braz. Soc. Mech. Sci. Eng., 33, pp. 265-271 | |
| dc.description | Franklin, E.M., Figueiredo, F.T., Rosa, E.S., The feedback effect caused by bed load on a turbulent liquid flow (2014) J. Braz. Soc. Mech. Sci. Eng., 36, pp. 725-736 | |
| dc.description | Meyer-Peter, E., Müller, R., Formulas for bed-load transport, in: Proc. 2nd Meeting of International Association for Hydraulic Research (1948), pp. 39-64Raudkivi, A.J., (1976) Loose Boundary Hydraulics, , Pergamon Press | |
| dc.description | Pähtz, T., Kok, J., Parteli, E.J.R., Herrmann, H.J., Flux saturation length of sediment transport (2013) Phys. Rev. Lett., 111, p. 218002 | |
| dc.description | Schlichting, H., (2000) Boundary-Layer Theory, , Springer | |
| dc.description | Coleman, S.E., Melville, B.W., Initiation of bed forms on a flat sand bed (1996) J. Hydraul. Eng., 122 (6), pp. 301-310 | |
| dc.description | Charru, F., Mouilleron-Arnould, H., Eiff, O., Erosion and deposition of particles on a bed sheared by a viscous flow (2004) J. Fluid Mech., 519, pp. 55-80 | |
| dc.description | Franklin, E.M., Charru, F., Subaqueous barchan dunes in turbulent shear flow. Part 1. Dune motion (2011) J. Fluid Mech., 675, pp. 199-222 | |
| dc.description | | |
| dc.description | | |
| dc.language | en | |
| dc.publisher | Elsevier Inc. | |
| dc.relation | Experimental Thermal and Fluid Science | |
| dc.rights | fechado | |
| dc.source | Scopus | |
| dc.title | The Formation And Migration Of Sand Ripples In Closed Conduits: Experiments With Turbulent Water Flows | |
| dc.type | Artículos de revistas | |
