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EDDY DIFFUSIVITY OF HEAT TRANSFER


Eddy diffusivity of heat transfer

A quantity characterizing the intensity of turbulent heat transfer, defined by the identity

where qturb = ρcpwy'T' is the turbulent heat flux density (i.e., the heat flux due to turbulent transfer) over a certain unit area in the flow; ρ is the density; wy' is the fluctuation of the transverse (with respect to the area element) component of the velocity vector; T' is the fluctuation temperature; cp is the heat capacity of the fluid at constant pressure; ∂T/∂y is the derivative with respect to the normal to the area element of the (time) averaged value of the temperature.
Comment. The term is defined by assuming that fluctuations of the physical prope ...

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表示回数:3172 記事追加日:19 February 2016 記事最終修正日:19 February 2016 ©著作権 2010-2018 トップへ戻る