Fluidos Flashcards

1
Q

Reynold Number

A

2100 - Laminar
4000 - Turbulent

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2
Q

Eqtn de Bernoulli

A

p2/rho + v2^2/2 + z2g =p1/rho + v1^2/2 + z1g

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3
Q

Equation para Friction Loss Laminar or Turbulent
Si se utiliza para shapes no noncircular D = Dh

A

Darcy Weisbach Eqtn

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4
Q

Friction Factor se saca del ____

A

Moody Chart

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5
Q

Que radio se utiliza para el flujo en noncircular conduits

A

R_h

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6
Q

Multipipelines utiliza las relaciones entre

A

A y B

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7
Q

Ecuaciones que se utilizan para los Open Channel and Partial-Area Pipe Flow

A

Manning Equations
Hazen-William Equation

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8
Q

A leak from a faucet comes out in separate drops instead of a steam. The main cause is

A

surface tension - which is caused by the molecular cohesive forces in a fluid. It is the main cause of the formation of drops of water.

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9
Q

kinematic viscosity units

A

m^2/s

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10
Q

(T o F) Lo siguiente aplica para todos los fluidos sean reales o ideales:
Newton’s second law of montion
Continuity Equiation (Q=Av)
Conservation of Energy

A

True

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11
Q

The rise of fall of liquid in a small-diameter capillary tube is affected by

A

Adhesive Forces
Cohesive Forces
Surface tension
Specific Weight
Diameter
Angel of contact
h=4sigmacosB/gama*d

No se ve afectado por fluid viscosity

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12
Q

Resolver Problemas de Manometro

A

Opcion 1 = Igualas las presiones en el lado que no se tiene la altura asumineto que la presion en uno de los lados es la suma de todos sus componentes y en el otro es la suma de todos los componentes del otro lado. las ecuaciones se igualan y se despejan
Opcion 2 = Seleccionas si la ecuacion va a ser P1= o P2=. El lado que selecciones, todos los componentes de ese lado se van a restar, todos los componentes del lado opuesto se van a sumar.

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13
Q

Problemas de Water Force en un tank

A
  1. Encontrar los compontes horizontales - se puede dividir la altura si es un shape extrano. Se encuentra la F en un area y luego en la otra y se suma. Se utiliza la formula de F=rhogAhave.
  2. Se encuentra el componente vertical. F=mg, como no hay m se calcula basado en el volumen. F=rhogV. El volumen es de toda el area por encima de donde se aplicaria la fuerza.
  3. Se haya el resultante con formula de magnitud
  4. El angulo se haya con theta= tan -1 (y/x)
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14
Q

_____ are decreases in pressure due to friction in valves, tees, and elbows. Are friction losses caused by fittings, changes in direction and change in flow area.

A

Minor losses

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15
Q

Hydraulic Radius formula

A

cross section area in flow / wetted perimeter

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16
Q

Basis of Bernoulli Equation for fluid flow

A

principle of conservation of energy

17
Q

isentropic

A

adiabatic and reversible, no entropy change

18
Q

For a particular gas, the acoustic velocity varies with

A

Temperature
c=sqr(kRT)

19
Q

Interpolate

A

(y2 - y1) /(y - y1) = (x2 - x1) / (x - x1)