Flow of High Internal Phase Ratio Emulsions through Pipes

1st International Conference on Rheology and Modeling of Materials

物理学;材料科学

Kostak, K.^1 ; Özsaygi, R.^1 ; Gündüz, I.^1 ; Yorganciolu, E.^1 ; Tekden, E.^1 ; Güzel, O.^1 ; Sadiklar, D.^1 ; Peker, S.^1,2 ; Helvaci, S.S.^1

Ege University, Faculty of Engineering, Department of Chemical Engineering, Bomova, Izmir

35100, Turkey^1

Ege University, Faculty of Engineering, Department of Chemical Engineering, Bornova, Izmir

35100, Turkey^2

关键词: Critical pressures;    Cylindrical pipes;    Different stages;    Drop size distribution;    Elongational viscosity;    High internal phase ratio emulsions;    Pressure increase;    Wall shear stress;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/602/1/012032/pdf
DOI  :  10.1088/1742-6596/602/1/012032

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

The flow behavior of W/O type of HIPRE stabilized by hydrogen bonds with a sugar (sorbitol) in the aqueous phase, was studied. Two groups of experiments were done in this work: The effect of wall shear stresses were investigated in flow through pipes of different diameters. For this end, HIPREs prestirred at constant rate for the same duration were used to obtain similar drop size distributions. Existence and extent of elongational viscosity were used as a probe to elucidate the effect of drop size distribution on the flow behavior: HIPREs prestirred for the same duration at different rates were subjected to flow through converging pipes. The experimental flow curves for flow through small cylindrical pipes indicated four different stages: 1) initial increase in the flow rate at low pressure difference, 2) subsequent decrease in the flow rate due to capillary flow, 3) pressure increase after reaching the minimum flow rate and 4) slip flow after a critical pressure difference. HIPREs with sufficient external liquid phase in the plateau borders can elongate during passage through converging pipes. In the absence of liquid stored in the plateau borders, the drops rupture during extension and slip flow takes place without elongation.