Investigation of non-Newtonian fluids flow behavior in a double step expansion channel : part 2

Abstract EN

A numerical investigation to study the behavior of the turbulent non-newtonian flow through a channel from two expansions with constant heat flux at the lower wall is calculated.

This behavior predicted for Reynolds number from 16000 to 100000 and for the range of power law index from 0.4 to 1.6.

The distance ratio between the two expansions is varied from 1 to 6 with expansion ratio from 1.5 to 3 and aspect ratio from 1 to 4.

These results are obtained by using ANSYS FLUENT 15.0.

The results illustrate the effect of the first expansion on the second expansion and the variation of the reattachment length and Nusselt number.

These results gave an idea about the ability of the step distance to control the whole flow structure.