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Non-Newtonian fluids are encountered in various engineering applications. This course introduces concepts required to analyze the behaviour of such fluids. Since micro-structural features of materials are responsible for non-Newtonian nature, this course describes the most commonly used classes of material systems and their rheological behaviour.
 

Week

Topics

1.

Flow phenomena in complex materials and microstructure; Complex materials; Applications of  rheology, with some example material systems

2.

Stress, strain rate, velocity gradient; Kinematics for simple flows

3.

Rheometric flows; Rheometers - general review

4.

Tensors and index notation; Viscous fluids; Stress relaxation

5.

Maxwell model; Oscillatory shear

6.

Relaxation time spectrum; Generalized Maxwell model; Time temperature superposition; Solidlike materials

7.

General linear viscoelastic material - linear response; Review of material functions

8.

Survey - polymers; Survey - glass-rubber transition

9.

Survey - multiphase systems; Experimental artifacts - fluid mechanics of cone/plate geometry

10.

Strain and convected rate; Normal stress, stress growth

11.

Yield stress fluids - Hershel Belkley model, thixotropic fluids - Structural MODEL

12.

Terms in nonlinear models; Microscopic origin of stress

Fluid Mechanics or solid mechanics course at the undergraduate level


Dynamics of Polymeric Liquids, Bird RB, Armstrong RC and Hassager O, John Wiley
& Sons, 1987. The Structure and Rheology of Complex Fluids, Larson RG, Oxford University Press,
1999. Rheology and Non-Newtonian Fluids, Irgens F, Springer, 2

NIL


NIL



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