Which of these statements is true?(a) The standard k-ε model and the RNG k-ε model are realizable(b) Neither the standard k-ε model nor the RNG k-ε model is realizable(c) The standard k-ε model is realizable but not the RNG k-ε model(d) The RNG k-ε model is realizable but not the standard k-ε modelThis question was posed to me by my college director while I was bunking the class.My doubt is from Turbulence Modelling in chapter Turbulence Modelling of Computational Fluid Dynamics

Which of these statements is true?(a) The standard k-ε model and the

1.	Which of these statements is true?(a) The standard k-ε model and the RNG k-ε model are realizable(b) Neither the standard k-ε model nor the RNG k-ε model is realizable(c) The standard k-ε model is realizable but not the RNG k-ε model(d) The RNG k-ε model is realizable but not the standard k-ε modelThis question was posed to me by my college director while I was bunking the class.My doubt is from Turbulence Modelling in chapter Turbulence Modelling of Computational Fluid Dynamics
Answer» Correct CHOICE is (b) Neither the STANDARD k-ε model nor the RNG k-ε model is REALIZABLE Easy explanation: Both the standard k-ε model and the RNG k-ε model are not realizable. They do not satisfy the MATHEMATICAL condition of REALIZABILITY. Only the realizable k-ε model is realizable.

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