div[αk μeff grad k] is the diffusion term in the transport equation of the turbulent kinetic energy. αk represents ____________(a) effects of internal thermal energy(b) effects of turbulent kinetic energy(c) effects of large-scale turbulence(d) effects of small-scale turbulenceThe question was posed to me during an interview.This interesting question is from Turbulence Modelling in section Turbulence Modelling of Computational Fluid Dynamics

div[αk μeff grad k] is the diffusion term in the transport equation

1.	div[αk μeff grad k] is the diffusion term in the transport equation of the turbulent kinetic energy. αk represents ____________(a) effects of internal thermal energy(b) effects of turbulent kinetic energy(c) effects of large-scale turbulence(d) effects of small-scale turbulenceThe question was posed to me during an interview.This interesting question is from Turbulence Modelling in section Turbulence Modelling of Computational Fluid Dynamics
Answer» Correct option is (d) effects of small-scale turbulence For EXPLANATION I would say: The EFFECT of small-scale turbulence is used while representing the DIFFUSION of turbulent kinetic energy in its transport equation as αk. In a similar way, the transport equation for the rate of dissipation of the turbulent kinetic energy contains αε.

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