Lecture 10 - Rheology Flashcards
1
Q
Define rheology
A
describes the flow of liquids
the higher the viscosity the higher the resistance is to flow
2
Q
Define rheogram
A
plot of shear rate as a function of shear stress
3
Q
Define Newtonian systems
A
linear behaviour
4
Q
Define non-newtonian systems and give some examples
A
do not follow Newtons Law of Flow
colloidal systems, emulsions, liquid suspensions, and ointments
5
Q
Name the 3 classes of flow
A
Plastic flow
Dilatant flow
Pseudoplastic flow
6
Q
Define thixotropy
A
Reflects slow recovery of viscosity lost on shearing a pseudo plastic or plastic fluid
7
Q
Define a viscometer
A
Measures fluid flow and viscosity of liquids
