Fig. 7From: A mean free path approach to the micro/nanochannel gas flowsThickness of the Knudsen layer predicted by different approaches: MD (open circles), Augmented Burnett (red filled squares) [49], Linear Boltzmann equation (green filled diamonds) [20], BGK-Burnett (blue filled triangles) [50], R13 (filled downtriangles) [51], and Regularised Burnett (pink stars) [52]. The dashed line refers to an exponential fit for our MD measurement. Note that the thickness of the Knudsen layer is normalised by the nominal MFP λ0 and is related to the Kramers’ problem, i.e. Kn →0 presented in the literatureBack to article page