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- Title
CFD study on rise and deformation characteristics of buoyancy-driven spheroid bubbles in stagnant Carreau model non-Newtonian fluids.
- Authors
Gollakota, Anjani; Kishore, Nanda
- Abstract
The bubbles are almost ubiquitous in many chemical and processing industries; and many of the polymeric solutions obey non-Newtonian rheological characteristics. Therefore, in this work the rise and deformation characteristics of spheroid bubbles in Carreau model non-Newtonian fluids are numerically investigated using a level set method. To demonstrate the validity of the moving bubble interface, the present simulations are compared with existing numerical and experimental results available in the literature; and for these comparisons, the computational geometries are considered same as reported in corresponding literatures. The present bubble deformation characteristics are satisfactorily agreeing with their literature counterparts. After establishing the validity of the numerical solution procedure, the same method is applied to obtain the deformation characteristics of an air bubble in Carreau model non-Newtonian fluids. Further, the results in terms of the volume fraction images, streamlines, and viscosity profiles around the deforming bubbles are presented as function of the bubble rise time.
- Subjects
BUBBLES; DEFORMATIONS (Mechanics); SPHEROIDAL state; RISE velocity (Spectrometry); VISCOSITY; NEWTONIAN fluids
- Publication
Theoretical & Computational Fluid Dynamics, 2018, Vol 32, Issue 1, p35
- ISSN
0935-4964
- Publication type
Article
- DOI
10.1007/s00162-017-0436-y