Peclet Number
In
physics
, the
Pclet number
is a
dimensionless number
relating the
forced
convection
of a system to its
heat conduction
. It is equivalent to the product of the
Reynolds number
with the
Prandtl number
. There are various definitions of the Pclet number. The most typical are as follows:
\mathit{Pe} = \frac{lv}{\alpha}
Pe =
Re
*
Pr
(equivalent to above)
\mathit{Pe} = \frac{lvc_p\rho}{\lambda}
\mathit{Pe} = \frac{l^2c_p\rho}{\lambda t}
With:
α -
Thermal diffusivity
λ -
Thermal conductivity
ρ -
Density
c
p
-
Heat capacity
l - Characteristic length
t - Characteristic time
v -
Velocity
It named after
Jean Claude Eugene Peclet
(1793-1857).
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