OCTOBER 19-20, 2012 - YMCA University of Science & Technology

Proceedings of the National Conference on
Trends and Advances in Mechanical Engineering,
YMCA University of Science & Technology, Faridabad, Haryana, Oct 19-20, 2012
Pressure drop
Variation in pressure drop predictions by mixture model for conveying of cement at solid loading ratio is shown
in Figs. 4 and 5. As expected, the pressure decreases along the flow constantly, where the effect of pipe bend on
flow is absent. However, as the flow reaches near pipe bend, the decrease in pressure is not constant and it
decreases rapidly in comparison to the horizontal pipeline. Further, the pressure changes across the pipe bend
cross-section with increased pressure at outer wall of the pipe bend.
The pressure gradient across the bend increases as the solid concentration or flow velocity increases. This
increase in pressure gradient may be attributed to the increased interaction between particles at higher
concentrations and flow velocities. The bend effect increases on downward side of the pipe as solid
concentration increases as the larger pressure gradients take its effect to longer distances.
Fig. 4 Three-dimensional pressure distribution profile of pneumatic conveying pipe line in horizontal plane,
conveying cement at solid loading ratio 119
Fig. 5 Three-dimensional pressure distribution profile of pneumatic conveying pipe line in horizontal plane,
conveying cement at solid loading ratio 18
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