Computational Fluid Dynamics Mixing Length Turbulence Model Online Exam Quiz
Computational Fluid Dynamics Mixing Length Turbulence Model GK Quiz. Question and Answers related to Computational Fluid Dynamics Mixing Length Turbulence Model. MCQ (Multiple Choice Questions with answers about Computational Fluid Dynamics Mixing Length Turbulence Model
What is the mixing length for the outer layer of a 2-D turbulent boundary layer?
Options
A : 0.09 times the boundary layer thickness
B : 0.08 times the boundary layer thickness
C : 0.07 times the boundary layer thickness
D : 0.06 times the boundary layer thickness
For a 2-D flow, what is the mixing length of the mixing layer turbulence model?
Options
A : 0.1 of layer width
B : 0.09 of layer width
C : 0.08 of layer width
D : 0.07 of layer width
The mixing length model links _____________ with _____________
Options
A : length scale with mean flow properties
B : velocity scale with mean flow properties
C : length scale with position coordinates
D : velocity scale with position coordinates
The mixing length model defines the turbulence dynamic viscosity as a function of ____________
Options
A : position
B : mean flow properties
C : fluctuating components
D : velocities
The value of mixing length depends on ____________
Options
A : small eddies
B : large eddies
C : turbulence
D : time scales
The mixing length for a 2-D turbulent boundary layer depends on ____________
Options
A : the distance from the wall and the boundary layer thickness
B : the distance from the wall and von Karman’s constant and dimensionless distance
C : von Karman’s constant
D : the boundary layer thickness
Mixing length model cannot be used for _____________
Options
A : turbulent jets
B : turbulent mixing layers
C : turbulent wakes
D : turbulent flows with separation
The mixing length model can be used to get the turbulent scalar fluxes also using _____________
Options
A : turbulent Prandtl/Reynolds number
B : turbulent Reynolds/ Schmidt number
C : turbulent Prandtl/Schmidt number
D : turbulent Reynolds/Nusselt number
Consider a turbulent flow of viscosity ?t, diffusivity ?t and Prandtl/Schmidt number ?t. Let ? be a flow property which can be decomposed into ?=?+?’. What is the turbulent scalar flux given by?
Options
A : –?u’?’=?tfrac{partialPhi}{partial x}
B : –?u’?’=?tfrac{partialPhi}{partial x}
C : –?u’?’=?tfrac{partialPhi}{partial x}
D : –?u’?’=?tfrac{partialPhi}{partial x}
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