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- W4317464983 abstract "In this paper, we have studied the three-dimensional dynamics of two equally sized air bubbles rising in a shear-thinning fluid. We have used the combined level set and volume of fluid (CLSVOF) method to track interface, maintain mass balance and estimate the interface curvature. Additionally, we have incorporated a Sharp Surface Force Method (SSF) for surface tension forces. This method significantly suppressed the spurious velocities commonly observed with the conventional volume of fluid method and the Continuum Surface Force (CSF). The algorithm is implemented in an in-house code called CUFLOW and runs on multiple GPUs platform. We have explored the effects of fluid rheology on the three-dimensional dynamics of two in-line bubbles. Two power-law indices (0.5 and 1) are investigated to highlight differences in shear-thinning and Newtonian fluids. For a range of parameters examined here, bubbles motion in a shear-thinning fluid is seen to be unsteady with significant shape oscillations. Further, we have examined the rise velocity, droplets rise path, transient shapes and found that modification of viscosity by the motion of the leading bubble changes the dynamics of the trailing bubble." @default.
- W4317464983 created "2023-01-20" @default.
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- W4317464983 date "2023-01-17" @default.
- W4317464983 modified "2023-09-30" @default.
- W4317464983 title "Dynamics of two air bubbles rising in a shear-thinning fluid" @default.
- W4317464983 doi "https://doi.org/10.48550/arxiv.2301.06988" @default.
- W4317464983 hasPublicationYear "2023" @default.
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