Practice Test Flashcards
Continuity equation can be derived from the general transport equation by setting phi and s equal to:
Phi=1 and S=0
Fick’s law of diffusion has units of:
m^2/s
In a Non-Newtonian fluid the shear stress is directly proportional to:
The strain rate of time to the power of an exponent not equal to one
Energy equation has term responsible for viscous heating and this term is known as:
The dissipation function
A true source term could be:
Nuclear fission
In derivation of the energy equation the rate of work acting upon the CV surface is a product of:
Force and velocity
A model of flow which has element fixed in space is known as:
Eulerian
A model of flow which has element free moving in the flow is known as:
Lagrangian
An example of a constitutive relationship is:
Stokes hypothesis
The constant of proportionality in Fick’s Law of Diffusion is:
The mass diffusivity
d.u.u/dx is known as:
The convective acceleration
Definition of a fully-developed laminar pipe flow is:
All axial gradients are zero except the pressure gradient
Operator grad function?
Converts scalar to vector
In Navier Stokes equation a normal stress term is:
du/dx
mu/rho[d^2u/dx^2] is:
The diffusion of u in the x direction for constant viscosity
Tau(xy)=Tau(yx) is true because:
Conservation of angular momentum
Negative sign in Stoke’s relationship for stress and strain rate exists to:
Ensure the 2nd law of thermodynamics is upheld
General transport equation consists of terms:
Transient + convection + diffusion + source
Examples of non-newtonian fluids:
Blood, tomato sauce
Del x u expands into:
du/dx +dv/dy +dw/dz=0
Del x u describes:
The steady state continuity equation for an incompressible flow
