Momentum Transfer: Fluid And Viscocity

Question 1

What is a fluid?

Answer 1

Substances with no strength
Deforms when forces are applied
Include water and gases

Question 2

2 types of fluid

Answer 2

Solid and fluid

Question 3

Described a solid fluid

Answer 3

Deformes a fixed amount or breaks completely when forces is applied on it

Question 4

Described a fluid

Answer 4

Deforms continuously as long as shear stress is applied

Question 5

What is mechanics ?

Answer 5

Study of motion and forces which cause or prevent the motion

Question 6

What is the three types of mechanics ?

Answer 6

Kinematics, statics and dynamics

Question 7

What’s is about kinematics ?

Answer 7

Description of motion: displacement, velocity and acceleration

Question 8

What is about statics?

Answer 8

Study of forces acting on the particles or body at rest

Question 9

What is about dynamics ?

Answer 9

Study of forces acting on the particles and bodies in motion.

Question 10

What’s the types of stresses?

Answer 10

Shear stress and normal stress

Question 11

What is about shear stress?

Answer 11

Force acting parallel to the surface per unfit area of the surface

Question 12

What is about normal stress ?

Answer 12

Force acting perpendicular to the surface per unit area of the surface

Question 13

Described fluid dinamics

Answer 13

Is the impulse force that gives the movement

Question 14

Described eFluid dynamics

Answer 14

Is the impulsive force that give movement. Involves the transport of momentum

Question 15

Described heat transfer

Answer 15

Deals with transport of energy (temperature)

Question 16

Described mass transfer

Answer 16

Is the transport of mass of various chemical species

Question 17

What is viscosity

Answer 17

Is the resistance of a fluid to be deformed by the application of a shear stress

Question 18

Described Newtonian fluid

Answer 18

Water, air and mercury

Question 19

Described non Newtonian fluid

Answer 19

Paints, polymers and blood

Question 20

Dynamic viscosity is

Answer 20

Medida de resistencia que pone el fluido a la resistencia

Question 21

Kinematic viscosity is

Answer 21

Es la relación dinámica de la viscosidad dinámica y la densidad

Question 22

Como medir viscosidad

Answer 22

Por viscocimetros capilares
Miden la viscosidad cinemática del fluido in a pipe
Basada en la ley de poisseuilles

Question 23

Otro método de medir la viscosidad

Answer 23

Rotational viscometers: obtienen esfuerzo que genera el aparato al estar en movimiento de los fluidos
Da el valor de dynamic viscocity

Question 24

The viscosity of liquids decrease which increase the temperature true or false

Answer 24

True

Question 25

The viscosity of gases increases with the increase the temperature true or false

Answer 25

True

Question 26

Lubricants viscosity increases or decreases with temperature

Answer 26

Increases

Question 27

For Newtonian fluids the shear stress is or isn’t linearly

Answer 27

For Newtonian fluid the shear stress is linearly but in non Newtonian fluid doesn’t follow the línea relation between viscosity and shear rate

Question 28

Explain the fluido pseudo plástico

Answer 28

Espesor y desplazamiento menor del fluido
Menos espesor con respecto a otros

Question 29

Describe el fluido thixotropico

Answer 29

Loss of consistency of the fluid as the duration of shear increases

Question 30

Described Brigham plastics

Answer 30

Fuerza de inicio para que el fluido se muevo

Question 31

Described Cason plastic

Answer 31

Comportamiento de pseudoplastico pero require esfuerzo inicial