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Power consumption and mixing time in rheologically complex fluids by a two-bladed impeller
Sarra Youcefi,Abdelkader Youcefi 대한기계학회 2015 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.29 No.2
This study investigates the power consumption and mixing time of a two-bladed stirrer during the mixing of viscoelastic fluids in thelaminar region of flow. For the rheological part, we use a polymer with low-concentration aqueous solutions that present viscoelasticbehavior. The rheological study performed on polyacrylamide solutions shows the viscoelastic behavior of the generalized “Kelvin–Voigt” model. The power consumption for the viscoelastic fluids is greater than that needed to mix Newtonian fluids at the same Reynoldsnumber. The mixing time is found to depend strongly on the viscoelasticity of the solutions.