AME 331 CH.2
A viscous fluid must flow very slowly when poured out of a can.
False
An inviscid fluid is expressed mathematically as μ=0 and ρ=0
False
As you stir a pot of liquid mercury, you notice that it is hard to stir. This is, it resists your stirring action. This resistance comes entirely from the viscosity of the fluid.
False
Flow through a duct system in a building is an example of a channel flow.
False
For a steady flow situation, the timelines, and streamlines are the same.
False
Glycerin is an example of a non-newtonian fluid because it's slow to pour out of a container
False
Liquid honey can be experimentally verified to be non-newtonian by showing that it pours more slowly that water out of a container
False
The dynamic viscosity miu has SI units of kg/(m⋅s)
False
The kinematic viscosity ν = μ/ρ of a fluid is an extensive property of the fluid
False
The velocity field corresponding to a solid-body rotation,V→=vθ(r)θ̂(theta) is a one-dimensional vector field when expressed in rectangular coordinates.
False
The velocity field of the form V→ =u(x,y)î is a two-directional vector field
False
A newtonian fluid is one that has a linear shear stress to shear strain-rate relationship
True
A normal stress on a static fluid's surface is also known as pressure.
True
A stress on a fluid particle's surface is defined as a force per unit surface area
True
A tangential stress on an object's surface is known as shear stress
True
Any contact force that acts on an area of the surface of a fluid particle can be expressed as a stress.
True
Crudely, you can recognize a flowing liquid as a laminar flow field if you inject a dye into the fluid and the flow looks very smooth and "glass-like".
True
Crudely, you can recognize when a fluid is turbulent if you inject a dye into the fluid and notice the flow field is very unsteady and "bubble" with lots of eddies swirling about, and the dye is quickly spread about and becomes unrecognizable in a short period of time.
True
Flow over a wing is an example of an external flow.
True
For a gas, the physical origins of the effect of viscosity acting on a small fluid particle of gas come from an exchange of momentum across the particle's boundary owing to random molecular motion plus a difference in bulk motion between the fluid particle and its environment.
True
For a steady flow situation, the curve representing the pathlines, streamlines, and streaklines are all the same.
True
Liquid honey and Paint are examples of non-newtonian fluids.
True
The continuum assumption for a fluid means that if the fluid was cut in half and in half again ad infinitum that the fluid's intensive properties, such as pressure and temperature, would be well defined in the limit at each point in space.
True
The kinematic viscosity ν=μ/ρ is independent of mass (kg)
True
The mathematical representation for an incompressible fluid is ρ = constant
True
The shear-strain rate on an object is a measure of the object's rate of deformation to an applied shear force
True
The velocity field V⃗1(x,y) = yî+xĵ is a two-dimensional, and two-directional vector field
True
The velocity field of the form V⃗V→ =u(x,y)î is a steady, two-dimensional, and one-directional vector field.
True
The velocity field of the form V→ =u(x,y)î is a two-dimensional vector field
True
The velocity field of the form V→ =u(x,y,t)î+v(x,y,t)ĵ is a two dimensional vector field
True
The velocity field of the form V→ is a one-dimensional vector field
True
Water flowing in a pipe is an example of an internal flow.
True
Water flowing in a river is an example of a channel flow.
True
