Realizable K Epsilon MCQ

Test your knowledge with important Realizable K Epsilon MCQ and their applications. These MCQs are beneficial for competitive exams too. Explore 30 + more Realizable K Epsilon MCQs at Bissoy

• Though the applicability of the realizable k-ε model and the RNG k-ε model are almost the same, the realizable k-ε model is ___________ when compared to the RNG k-ε model.
  ক

  more accurate and converges easily

  খ

  more stable

  গ

  linear

  ঘ

  more consistent
• The realizable k-ε model is best for predicting __________
  ক

  mixing layers

  খ

  wake formation

  গ

  spreading of jets

  ঘ

  smooth boundary layer flows
• Which of these equations gives the turbulent dynamic viscosity used in the realizable k-ε model?
  ক

  μt ∝ ρk/ε

  খ

  μt ∝ k / ε

  গ

  μt ∝ ρk2/ε

  ঘ

  μt ∝ k2ε
• The non-linear k-ε models relate the Reynolds stresses to _________
  ক

  the cubic vector products of strain rate and vorticity

  খ

  the quadratic vector products of strain rate and vorticity

  গ

  the cubic tensor products of strain rate and vorticity

  ঘ

  the quadratic tensor products of strain rate and vorticity
• The realizable k-ε model is based on ________
  ক

  the turbulence model replacing the realizability constraint

  খ

  the viscoelastic analogy replacing the realizability constraint

  গ

  the realizability constraint with viscoelastic analogy

  ঘ

  the realizability constraint without viscoelastic analogy
• The realizable k-ε model falls into which of these categories?
  ক

  Non-linear two-equation turbulence models

  খ

  Linear two-equation turbulence models

  গ

  Non-linear three-equation turbulence models

  ঘ

  Linear two-equation turbulence models
• Which of these statements is true?
  ক

  The standard k-ε model and the RNG k-ε model are realizable

  খ

  Neither the standard k-ε model nor the RNG k-ε model is realizable

  গ

  The standard k-ε model is realizable but not the RNG k-ε model

  ঘ

  The RNG k-ε model is realizable but not the standard k-ε model
• Which of these conditions define realizability?
  ক

  Negative k and ε values

  খ

  Linear k and ε transport equations

  গ

  Non-negative k and ε values

  ঘ

  Non-linear k and ε transport equations