WVBottomFrictionLinear

Linear bottom friction

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Declaration

WVBottomFriction < WVForcing

Overview

Applies linear bottom friction to the flow, i.e., \(\frac{du}{dt} = -r*u\).

The linear bottom friction is scaled such that we actually apply, \(\frac{du}{dt} = -(Lz/dz)*r*u\) and the volume integrated effect of friction remains the same regardless of resolution.

To compare with quadratic bottom friction where \(\frac{du}{dt} = -(Cd/dz)*|u|*u\), note that \(-(Lz/dz)*r = -(Cd/dz)*|u|\) and you will find a characteristic velocity \(|u|\) of about 10 cm/s for Cd=0.002.

Topics

• Other
  • WVBottomFrictionLinear initialize the WVNonlinearFlux nonlinear flux
  • classRequiredPropertyNames
  • r
  • r_scaled

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