Computational Fluid Dynamics Reynolds Averaged Navier Stokes Model Online Exam Quiz
Computational Fluid Dynamics Reynolds Averaged Navier Stokes Model GK Quiz. Question and Answers related to Computational Fluid Dynamics Reynolds Averaged Navier Stokes Model. MCQ (Multiple Choice Questions with answers about Computational Fluid Dynamics Reynolds Averaged Navier Stokes Model
From which of these terms does the turbulent viscosity arise from?
Options
A : frac{partial(overline{ ho} ilde{u})}{partial t}
B : -frac{partial ilde{p}}{partial x}
C : div(mu gradwidetilde{(vec{V})})
D : frac{partialoverline{(overline{ ho}u{‘}v{‘})}}{partial y}
Which of these properties of turbulence is ruled out in Reynolds averaged equations?
Options
A : Fluctuations
B : Turbulence
C : Non-linearity
D : Randomness
To close the RANS equations, we need _____________
Options
A : Incompressible flow model
B : DNS method
C : Turbulence models
D : SGS model
How many additional terms are present in the x-momentum equation Reynolds-Averaged Navier-Stokes equations?
Options
A : No additional terms
B : Six additional terms
C : Three additional terms
D : Two additional terms
Reynolds averaging makes the conservation equations ____________
Options
A : non-conservative
B : non-linear
C : unstable
D : inconsistent
Which of these terms arise in the conservation equations when using the RANS model?
Options
A : Reynolds stresses and turbulent scalar flux
B : Cross stresses and turbulent scalar flux
C : Leonard stresses and turbulent scalar flux
D : Leonard stresses and cross stresses
The averaging interval in RANS equation is based on ____________
Options
A : the grid size
B : the eddy size
C : the fluctuations
D : the time interval of the problem
What is the difference between the RANS model and the Reynolds stress model?
Options
A : The RANS model needs 5 extra transport equations
B : The Reynolds stress model needs 5 extra transport equations
C : The RANS model needs 7 extra transport equations
D : The Reynolds stress model needs 7 extra transport equations
For unsteady turbulent flows, which of these averaging method is used?
Options
A : Time averaging
B : Ensemble averaging
C : Spatial averaging
D : Volume averaging
The Reynolds stress term arises in the turbulent equation only when ____________
Options
A : two quantities are correlated
B : two quantities are uncorrelated
C : the flow is steady
D : the flow is unsteady
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