Non-Newtonian Fluid Flow Between Two Moving Eccentric Cylinders

Description

Non-Newtonian Fluid Flow Between Two Moving Eccentric Cylinders, ANSYS Fluent CFD Simulation Training

Description

A non-Newtonian fluid is a fluid that does not follow Newton’s law of viscosity, i.e., constant viscosity independent of stress. In non-Newtonian fluids, viscosity can change when under force to either more liquid or more solid. Ketchup, for example, becomes runnier when shaken and is thus a non-Newtonian fluid. Many salt solutions and molten polymers are non-Newtonian fluids, as are many commonly found substances such as custard, honey, toothpaste, starch suspensions, corn starch, paint, blood, melted butter, and shampoo. In this project, ANSYS Fluent software has simulated the two-phase flow of a non-Newtonian fluid consisting of materials of Drilling and CMC between two eccentric cylinders. The geometry of this model consists of two eccentric cylinders and is designed and meshed in Gambit. The mesh type used for this geometry is structured, and the element number is 179,820.

Non-Newtonian Fluid Flow Methodology

The standard k-omega model is used for flow analysis, and low-Re correction is activated to capture the flow patterns better. The Eulerian multiphase model for two phases of Drilling and CMC has been used to investigate the phase interactions of the non-Newtonian fluid. The mixture of these two fluids will enter the space between the eccentric cylinders with a velocity of 0.25m/s, and the inner cylinder will start to rotate by applying the Moving Wall option.

Conclusion

The 3D and 2D contours of pressure, velocity, streamlines, volume fraction, and eddy viscosity are presented. From the results, we can conclude that the drilling volume fraction is maximum in the zones where the CMC volume fraction is the minimum and vice versa.