Q.1
LES is preferred when _____________
  • a) the flow is compressible
  • b) the flow has a high Reynolds number
  • c) the flow is turbulent
  • d) the flow has heat transfers
Q.2
LES uses _____________
  • a) spatial filtering
  • b) time averaging
  • c) ensemble averaging
  • d) reynolds averaging
Q.3
What does SGS stress stand for?
  • a) Sub-grid-scale stress
  • b) Suitable-grid-scale stress
  • c) Suitable-grey-scale stress
  • d) Sub-grey-scale stress
Q.4
Which of these will not come under the types of filter functions used by the LES model?
  • a) Top-hat filter
  • b) Leonard filter
  • c) Gaussian filter
  • d) Spectral cut-off
Q.5
What is the other name of the top-hat filter?
  • a) Cross filter
  • b) Cube filter
  • c) Box filter
  • d) Square filter
Q.6
Which of these filters is commonly used in FVM models?
  • a) Gaussian filter
  • b) Top-hat filter
  • c) Spectral cut-off filter
  • d) Gaussian and spectral cut-off filter
Q.7
In FVM methods, cut-off width depends on ____________
  • a) the PDE
  • b) the algebraic equation
  • c) the grid-size
  • d) the discretization method
Q.8
The cut-off width dependent on the finite volume grid size is equal to _____________
  • a) the square of the grid cell volume
  • b) the cube of the grid cell volume
  • c) the square root of the grid cell volume
  • d) the cube root of the grid cell volume
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