FLOW OF SAND-WATER MIXTURES AT VELOCITIES BELOW THE DEPOSITION CONDITION

An experimental study of sand-water flow in a horizontal pipeline has been conducted for the regime in which a stationary deposit was presen t. The particle diameter ranged between 0.2 mm and 0.01 mm and the par ticles were not flocculated. Axial pressure gradients and delivered co ncentrations were measured as functions of mean velocity and in-situ c oncentration. A three layer model was found to be useful to predict-th e pipeline behavior at all but the lowest velocities. The Meyer-Peter sediment transport equation was satisfactory for very low velocities w ith the larger particles.