This type of dissipation is not caused by friction on the molecular level, but by the nonlinear effects of the Navier Stokes equations.
2.
In Reynolds-averaged Navier Stokes equations, the turbulence kinetic energy can be calculated based on the closure method, i . e . a turbulence model.
3.
That is probably more fun than setting up a thin-film navier stokes equation and trying to solve it; ) talk ) 18 : 04, 23 February 2015 ( UTC)
4.
The first and third terms to the Hasegawa Mima equation, which are the same as the Navier Stokes equation, are the terms introduced by adding the polarization drift . In the limit where the wavelength of a perturbation of the electric potential is much smaller than the gyroradius based on the sound speed, the Hasegawa Mima equations become the same as the two-dimensional incompressible fluid.
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