Experiments on the effects due solely to a mobile granular layer on a liquid
flow are presented (feedback effect). Nonintrusive measurements were performed
in a closed conduit channel of rectangular cross section where grains were
transported as bed load by a turbulent water flow. The water velocity profiles
were measured over fixed and mobile granular beds of same granulometry by
Particle Image Velocimetry. The spatial resolution of the measurements allowed
the experimental quantification of the feedback effect. The present findings
are of importance for predicting the bed-load transport rate and the pressure
drop in activities related to the conveyance of grains.Comment: Accepted Manuscript for the Journal of the Brazilian Society of
Mechanical Sciences and Engineering, v. 36, p. 725-736, 2014. The final
publication is available at Springer via
http://dx.doi.org/10.1007/s40430-013-0122-
Aos meus pais, Celso e Shirlene, e ao meu irmão, Fellipe, que desde a graduação fazem o possível e impossível para que eu busque o caminho do sucesso pessoal e profissional e que, apesar da distância, estiveram presentes em todos os dias de minha trajetória. v
AgradecimentosA Deus, pela saúde e determinação para superar todos os obstáculos.
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