The sensitivity of pressure drop predicting in pneumatic transport with different settings were investigated numerically by means of the commercial CFD software Fluent. The simulation was performed by the Euler-Euler approach accounting for four-way coupling. The pressure drops between certain cross-sections of a pneumatic conveying pipeline with a length of 26 m and an inner diameter of 53 mm were predicted based on a series of experiments. The conveyed material was flyash with a mean particle size of 30 micron and the solids loading ratios was in the range of about 20 to 70. The agreement of the predictions with the experiments was found to be very good. Furthermore, the effect of various CFD settings on the pressure drops was investigated systematically. It was found that models for solids shear viscosity, solids pressure, radial distribution and drag coefficient have little effect on pressure drop predictions, and viscous model for different turbulence models has a little larger influence on pressure drop in comparison. The most sensitive variables are related to wall shear conditions.
6th International Conference for Conveying and Handling of Particulate Solids with 10th ICBMH and BULKEX, 2009 (CHoPS 2009). 6th International Conference for Conveying and Handling of Particulate Solids with 10th ICBMH and BULKEX: Conference Proceedings (Brisbane, Qld 3-7 August, 2009) p. 102-107