ACCELERATION MOTION OF A SINGLE VERTICALLY FALLING NON-SPHERICAL PARTICLE IN INCOMPRESSIBLE NON-NEWTONIAN FLUID BY DIFFERENT METHODS
Journal Title: Bulletin of Pure and Applied Sciences Sec. E - Mathematics and Statistics - Year 2018, Vol 37, Issue 2
Abstract
An analytical investigation is applied for acceleration motion of a vertically falling non-spherical particle in a Shear-thinning (n<1) and Shear-thickening (n>1) power low fluid. The acceleration motion of vertically falling non-spherical particle in non-Newtonian fluid can be described by the force balance equation (Basset-Boussinesq-Ossen equation).The main difficulty in the solution of this equation lies in the nonlinear term due to the nonlinearity nature of the drag coefficient. Varinational Iterations Method (VIM) and Numerical Method (Runge- Kutta 4th order method) are used to solve the present problem. The results were compared those obtained from VIM by R-K 4thorder method. We obtained that VIM which was used to solve such non-linear differential equation with fractional power is simpler and more accurate than other methods. Analytical results also indicate that the velocity in a falling procedure is significantly increased with approaching flow behavior to n→2 that validated with numerical method. Acceleration motion of a vertically falling single non-spherical particle is decreasing as behavior index increasing and particle falling in high behavior index fluid attains early its terminal velocity as compare to low behavior index fluid. To obtain the results for all different methods, the symbolic calculus software MATLAB is used.
Authors and Affiliations
Harpreet Kaur,
Keywords
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- EP ID EP531727
- DOI 10.5958/2320-3226.2018.00029.2
- Views 148
- Downloads 0
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