Viscosity

Question 1

represents the internal resistance of a fluid motion or the “fluidity” of that property

Answer 1

Viscosity

Question 2

force a flowing fluid exerts on a body in the flow direction

Magnitude depends on the viscosity

Answer 2

Drag force

Question 3

force tending to cause deformation of a material by slippage along a plane or planes parallel to the compound stress

Answer 3

shear stress

Britannica.com

Question 4

ratio of dynamic viscosity to density

Answer 4

kinematic viscosity

Question 5

common unit of kinetmatic velocity

Answer 5

stoke

1 stoke = 1cm^2/s

Question 6

another word for dynamic velocity

Answer 6

absolute viscosity

Question 7

tangential force per unit area required to move one horizontal plane with respect to another plane

Answer 7

coefficient of viscosity/ dynamic (absolute) viscosity

Engineeringtoolbox.com

Question 8

common viscosity unit

Answer 8

poise

1 poise = 0.1 Pa.s

Question 9

the rate of deformation (velocity gradient) of a Newtonian fluid is ____ to sheer stress (the constant of proportionality is the viscocity

Answer 9

proportional

Question 10

For non-Newtonian fluids, the relationship between shear stress and rate of deformation is_______

Answer 10

not linear

Question 11

slope of the curve on the τ v s du/dy chart of fluid

Answer 11

apparent viscosity

Question 12

fluids for which the apparent viscosity increases with the rate of deformation (e.g. solution with suspended starch or sand)

Answer 12

dilutant or shear thickening fluids

Question 13

fluid becomes less viscous as it is sheared harder
e.g. some paints, polymer solutions and fluids with suspended particles

Answer 13

pseudoplastic/shear thinning fluids