Rheology In Greek to flow

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RheologyIn Greek to flow

• Lecture Notes 1

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Introduction

• Syllabus course outcomes
• What is rheology?
• Applications of rheology to problem solving
• Rheology of Silly Putty
• Brief history of rheology

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What is Rheology?

• Rheology is the science of flow and deformation
  of matter

Rheology Concepts, Methods, Applications, A.Y.
Malkin and A.I. Isayev ChemTec Publishing, 2006
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What Is Rheology?

• Rheology is a science concerned with
  mathematical properties of various solid-like,
  liquid-like, and intermediate technological and
  natural products. It accomplishes its goals by
  means of models representing principal
  peculiarities of behavior of these materials. The
  behavior of these materials is a relationship
  between forces and changes in shape. A model
  gives a mathematical formulation of such
  relationship. Rheological properties are
  expressed by the model structure (i.e.
  mathematical image) and values of constants
  included in the model are characteristics of
  material.

From Rheology Concepts, Methods, Applications,
A.Y. Malkin and A.I. Isayev ChemTec Publishing,
2006 page 5
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Some Interesting Phenomena
Shear-thinning and shear-thickening Yield
stress Weissenberg effect Fluid memory Die
swell Tubeless Syphon
See the movies at this site web.mitt.eddo/nun/
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Application of Rheology

• Polymer melts, solutions including composites
• Rubber
• Lubricants
• Paints
• Printing inks
• Printing inks
• Paper and pulp
• Food
• Biological fluids
• Concrete
• Cosmetics
• Pharmaceuticals

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Application of Rheology to Problem Solving

• Material characterization
• Material processing
• See the applications notes of various
  instrument makers such as Brookfield, TA
  Instruments, Malvern, etc

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Rheology of Silly Putty
See http//www.campoly.com/application_notes.html
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Brief History

• 1676 Hooks elasticity law
• 1687 Newtons viscosity law
• 1874 Boltzmans theory of linear
  viscoelastic materials
• 1916 Bigham model for viscoplastic
  materials
• 1929 First meeting of the Society of
  Rheology

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References

• For history see The Rheology Handbook 2nd
  Edition by Thomas G. Mezger, 2006, Vincentz
  Network, Hannover, Germany
• For basic introduction to rheology watch this web
  cast http//www.brainshark.com/brainshark/vu/view.
  asp?pi74429textM929942
• For rheology of Silly Putty see
  http//www.campoly.com/application_notes.html
• Rheology Concepts, Methods, Applications by
  A.Y. Malkin and A. I. Isayev