Computational Fluid Dynamics K Epsilon Model Online Exam Quiz
Computational Fluid Dynamics K Epsilon Model GK Quiz. Question and Answers related to Computational Fluid Dynamics K Epsilon Model. MCQ (Multiple Choice Questions with answers about Computational Fluid Dynamics K Epsilon Model
Express the large scale length in terms of k and ?.
Options
A : (k/?)3/2
B : k3/2/?
C : ?/k3/2
D : (?/k)3/2
In high Reynolds number turbulent flows _______________ terms dominate.
Options
A : diffusion terms
B : convection terms
C : viscous stress terms
D : turbulent effect terms
____________ and _____________ are used in the k-? model in addition to k and ? to formulate the transport equations.
Options
A : Internal thermal energy and turbulent stresses
B : Internal thermal energy and kinetic energy
C : Rate of deformation and turbulent stresses
D : Rate of deformation and kinetic energy
The terms accounting for turbulence effects contain ____________
Options
A : Reynolds stresses
B : Turbulent kinetic energy
C : Dissipation of turbulent kinetic energy
D : Length scale terms
If Sij represents the rate of deformation, ? represents the dynamic viscosity and vec{V}, the velocity of the flow, What does the terms div(2?vec{V}Sij) and 2?Sij account for?
Options
A : The effect of turbulent stresses
B : The effect of viscous stresses
C : The effect of Reynolds stresses
D : The effect of kinetic energy
The k-? model focuses on the mechanism which affects ____________
Options
A : the Reynolds stresses
B : the cross stresses
C : the transport of scalar fluxes
D : the turbulent kinetic energy
What does the name k-? model signify?
Options
A : The seven extra transport equations used in the model
B : The variation of k and ? with the flow variables
C : The variation of k with ?
D : The two extra transport equations used in the model
What does k and ? stand for?
Options
A : Turbulent kinetic energy and its dissipation rate per unit mass
B : Turbulent kinetic energy and turbulent diffusivity
C : Turbulent diffusivity and its dissipation rate per unit mass
D : Turbulent kinetic energy and mass transfer
Express the large scale velocity in terms of k and ?.
Options
A : ?1/2
B : (?/k)1/2
C : k1/2
D : (k/?)1/2
Let C? be a dimensionless constant and ? be the density of the flow. Express the eddy dynamic viscosity in terms of k and ?.
Options
A : ?C?k2/?
B : ?C? k/?
C : ?C? ?/k
D : ?C? ?2/k
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