PT8451 - FLUID MECHANICS AND POLYMER RHEOLOGY (Syllabus) 2017-regulation Anna University

PT8451 - FLUID MECHANICS AND POLYMER RHEOLOGY (Syllabus) 2017-regulation Anna University

PT8451	FLUID MECHANICS AND POLYMER RHEOLOGY	LPTC

3003

OBJECTIVES:

• To understand the basic concepts of rheology
• To analyze the flow behavior of polymer melts and to carry out the experimental techniques for measuring the rheological properties.
• To understand the basics of fluid mechanism and to analyze behavior of newtonian fluids.
• To experimental with instruments such as orifice meter, venturi meter and pitot tube.

UNIT I	FLUID PROPERTIES	9

Units and dimensions-Properties of fluids-mass density, specific weight, specific volume, specific gravity, viscosity, surface tension and capillarity-Terminologies of fluid flow-Laminar and turbulent flow of newtonian fluids-Power law-Reynolds number and its significance

UNIT II	FLUID FRICTION AND FLOW MESUREMENT	9

Bernoulli‘s equation–kinetic energy correction factor; head loss; friction factor; major and Minor losses- Flow measurement: Introduction; Orifice meter; Venturi meter; concept of area meters: rotameter; Local velocity measurement: Pitot tube

UNIT III	FLUID RHEOLOGY	9

Introduction and Basic concepts of Rheology, classification of fluids, Newtonian and non Newtonian fluids, shear stress, shear strain and shear rate, shear modulus, bulk modulus, Zero shear viscosity, Dependence of viscosity with temp, shear stress , Viscoelasticity - effect of rate of strain, temperature and time on mechanical behaviour of polymeric materials

UNIT IV	POLYMER RHEOLOGY	9

Mechanical models - stress strain response of spring and dashpot - visco elastic models -Maxwell element - Voigt kelvin element - response to creep and stress relaxation -four parameter model - Boltzman principle - time temperature super position principle - WLF equation.

UNIT V	MEASUREMENT OF POLYMER VISCOSITY	9

Viscosity of polymer melts – die swell and melt fracture - Weissenberg effect - Elongational viscosity. Measurements of rheological properties - capillary rheometers – cone and plate viscometer - Oscillating disc rheometer - Mooney viscometer.

TOTAL : 45 PERIODS

OUTCOMES: On completion of the course, students

• Will have thorough knowledge on the basic concepts of rheology.
• Will able to analyze the mechanical behavior of polymers under applied load.
• Will carry out the experimental techniques for measuring the rheological properties.
• Will understand the basics of fluid mechanics and to analyze the behavior of newtonian fluids.
• Will be able to the instruments such as orifice meter, venturi meter & pitot tube.

TEXT BOOKS:

1. J.A.Brydson, Flow properties of polymer melts, life books, London, 1981.
2. R.J. Crawford, Plastics Engineering, Butterworth - Heinemann, Oxford, 2002, 3rd edition
3. Dr.R.K.Bansal, “A Textbook of Fluid mechanics and Hydraulic Machines”, 9th edition, 2017

REFERENCES:

1. P.N.Cogswell, Polymer Melt Rheology, A guide for Industrial Practice, George Godwin,1981.
2. Richard C. Progelh of and James L. Throne, Polymer Engineering Principles, Hanser Publishers, New York, 1998.
3. John M. Dealy and Kurt F. Wissburn, Melt rheology and its role in plastics processing, Chapman, London, Oct 3rd, 2013.
4. R.S. Lenk, Polymer Rheology, Applied Science, London, 2012.
5. J.D. Ferry, Viscoelastic Properties of Polymers, john Wiley & Sons, New York, 1986.
6. Chang Dae Han. Rheology in Polymer Processing, Academic Press, New York, 1976