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We perform calculations of 2D laminar and 3D turbulent channel flow with periodic streamwise boundary conditions. From the laminar results we verify that the FDS wall boundary condition is second-order accurate. For the turbulent cases we adapt the wall stress model of Werner and Wengle to FDS and verify the implementation by replicating the Moody diagram, a plot of friction factor versus Reynolds number for turbulent pipe flow.
McDermott, R.
(2009),
FDS Wall Flows Part I: Straight Channels, Technical Note (NIST TN), National Institute of Standards and Technology, Gaithersburg, MD, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=902843
(Accessed October 14, 2025)