The fluid layer which is in contact with a smooth wall is called ____________(a) Inviscid layer(b) Linear sub-layer(c) Log-law layer(d) Wake-law layerThe question was posed to me in an interview for internship.My question comes from Turbulent Boundary Layer in chapter Turbulence Modelling of Computational Fluid Dynamics

The fluid layer which is in contact with a smooth wall is called _____

1.	The fluid layer which is in contact with a smooth wall is called ____________(a) Inviscid layer(b) Linear sub-layer(c) Log-law layer(d) Wake-law layerThe question was posed to me in an interview for internship.My question comes from Turbulent Boundary Layer in chapter Turbulence Modelling of Computational Fluid Dynamics
Answer» The correct answer is (b) Linear sub-layer To EXPLAIN I would say: In the FLUID layer which is in contact with a smooth WALL, the value of DIMENSIONLESS velocity and dimensionless cross-stream distance tend to be the same. Because of this linear RELATIONSHIP, the layer is named linear sub-layer.

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