CFD Online URL
Home > Wiki > Turbulence kinetic energy

Turbulence kinetic energy

From CFD-Wiki

Revision as of 20:12, 11 June 2011 by Peter (Talk | contribs)
(diff) ← Older revision | Latest revision (diff) | Newer revision → (diff)
Jump to: navigation, search

The turbulence kinetic energy, k, is the kinetic energy per unit mass of the turbulent fluctuations u_i' in a turbulent flow. The SI unit of k is J/kg = m^2/s^2.

k \, \overset{\underset{\mathrm{def}}{}}{=} \, \frac{1}{2} \overline{u_i' u_i'} = \frac{1}{2} \left(\overline{u_x'^2} + \overline{u_y'^2} + \overline{u_z'^2} \right) = \frac{3}{2} \overline{u'^2}
My wiki