Abstract: The present paper describe experimental results on particle velocity profiles obtained for single particle flows ofsolid-liguid through vertical pipes(up-flow).A video recording technique has been used to determine both the particle axial velocityand the radial position of the particles.And the slip velocity for single particles has been compared with predicted values byusing literature correlations modified to take into account the non-spherical shape of the particles and the non-Newtonianbehaviour of the CMC solutions.The predicted values were in general very close to experimental values.The effects of flow rateand particle size on the particle velocity profiles were also discussed in this paper.

Key words: particle, food processing, solid-liquid flow, slip velocity