Agradecimentos: The authors are grateful to Petrobras S.A. for the financial support (Contract Number 0050.0045763.08.4), including the scholarship granted to Fabíola Tocchini de Figueiredo. The authors thank Guilherme Augusto Ayek for the help with the experimental device and the PIV set-up. Erick...

Agradecimentos: The authors are grateful to Petrobras S.A. for the financial support (Contract Number 0050.0045763.08.4), including the scholarship granted to Fabíola Tocchini de Figueiredo. The authors thank Guilherme Augusto Ayek for the help with the experimental device and the PIV set-up. Erick de Moraes Franklin is grateful to FAPESP (Grant 2012/19562-6)

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...

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

FUNDAÇÃO DE AMPARO À PESQUISA DO ESTADO DE SÃO PAULO - FAPESP

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