In the low Reynolds number turbulence models, the first internal grid point is placed in the ___________(a) log-law layer(b) buffer layer(c) inertial sub-layer(d) viscous sub-layerI have been asked this question during an interview.The origin of the question is Turbulence Modelling in chapter Turbulence Modelling of Computational Fluid Dynamics

In the low Reynolds number turbulence models, the first internal grid

1.	In the low Reynolds number turbulence models, the first internal grid point is placed in the ___________(a) log-law layer(b) buffer layer(c) inertial sub-layer(d) viscous sub-layerI have been asked this question during an interview.The origin of the question is Turbulence Modelling in chapter Turbulence Modelling of Computational Fluid Dynamics
Answer» Correct choice is (d) viscous sub-LAYER The explanation is: It is difficult to MODEL the flow in the buffer layer. So, the low Reynolds NUMBER models place the first INTERNAL grid POINT in the viscous sub-layer and the high Reynolds number models place it in the inertial sub-layer skipping the buffer layer.

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