Abstract
The momentum transfer characteristics of slip flow around an assemblage of spherical particles in a shear-thinning fluid (n = 0.6) is numerically studied. At fluid-solid interface a linear slip velocity is applied. As the non-dimensional slip number (λ) increases, the fluid slip becomes weaker i.e., λ = 0 represents fully slip flow and λ = ∞ indicate no-slip velocity at the solid-fluid interface. A finite difference method based on SMAC semi-implicit algorithm is used in this work over the range of conditions as: Reynolds number, Re = 100–200, power-law behavior index, n = 0.6, volume fraction of slip spheres, Φ = 0.1, and dimensionless slip parameter, λ = 0.01–100. Finally effects of these parameters on detailed flow kinematics are discussed in details.
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Abbreviations
- C d :
-
Total drag coefficient
- C df :
-
Friction drag coefficient
- C dp :
-
Pressure drag coefficient
- F d :
-
Drag force (N)
- p :
-
Pressure
- r :
-
Radial distance
- R :
-
Sphere radius (m)
- λ :
-
Slip number
- Re :
-
Reynolds number
- R ∞ :
-
Cell boundary
- U :
-
Free stream velocity (m/s)
- v r :
-
r-component of velocity
- v θ :
-
θ-component of velocity
- Φ :
-
Volume fraction of slip spheres
- ε:
-
Rate of strain tensor
- η:
-
Fluid viscosity
- ρ:
-
Fluid density (kg/m3)
- τ:
-
Extra stress tensor
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Ramteke, R.R., Nanda Kishore (2017). Slip Flow of a Shear-Thinning Power-Law Fluid Past an Assemblage of Spherical Particles. In: Saha, A., Das, D., Srivastava, R., Panigrahi, P., Muralidhar, K. (eds) Fluid Mechanics and Fluid Power – Contemporary Research. Lecture Notes in Mechanical Engineering. Springer, New Delhi. https://doi.org/10.1007/978-81-322-2743-4_2
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