Knudsen Number Calculator

Knudsen Number Calculator

Determine the flow regime of a fluid

Air at STP ≈ 6.8e-8 m

Knudsen Number (Kn)------
Regime Info

Kn < 0.01: Continuum (Navier-Stokes applies)
0.01 < Kn < 0.1: Slip Flow
0.1 < Kn < 10: Transition Flow
Kn > 10: Free Molecular Flow

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