A phenomenological model to describe turbulent friction in permeable-wall flows

A phenomenological model to describe turbulent friction in permeable-wall flows

[1] Describing the canonical properties of turbulent flows over rough-permeable walls such as gravel beds, vegetatedor snow-covered surfaces have, to date, resisted complete theoretical treatment. The major complication in describing such geophysical flows is that the friction factor Reynolds number relationships significantly deviate from their conventional Nikuradse curves or Moody diagrams d...

A method for estimating wall friction in turbulent wall-bounded flows

We describe a simple method for estimating turbulent boundary layer wall friction using the fit of measured velocity data to a boundary layer model profile that extends the logarithmic profile all the way to the wall. Two models for the boundary layer profile are examined, the power-series interpolation scheme of Spalding and the Musker profile which is based on the eddy viscosity concept. The ...

A new eddy-based model for wall-bounded turbulent flows

A Method for Estimating Wall Friction in Turbulent Boundary Layers

We describe a simple method for estimating wall friction which uses the fit of velocity data to the boundary layer profile in wall units all the way from the wall to the end of the log region. Two different models for the boundary layer profile are examined, the power-series interpolation scheme of Spalding and the Musker profile which is based on the eddy viscosity concept. The accuracy of the...

The largest scales of turbulent wall flows

The small scales of wall-bounded turbulent flows have received a lot of attention in recent years, especially in the near-wall region, in part because of the availability of direct numerical simulations that made their detailed study possible (Kim, Moin & Moser 1987). Since those simulations had necessarily moderate Reynolds numbers and little or no separation between their largest and smallest...