Encyclopedia > Peclet number

Article Content

Peclet number

In physics, the Péclet 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 Péclet number. The most typical are as follows:

Pe = l * v / α

Pe = l * v * ρ * c_p / λ

Pe = l² * ρ * c_p / λ / t

Pe = Re * Pr

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)

All Wikipedia text is available under the terms of the GNU Free Documentation License

Search Encyclopedia

Search over one million articles, find something about almost anything!

Featured Article

Lake Ronkonkoma, New York

... to 64, and 12.2% who are 65 years of age or older. The median age is 37 years. For every 100 females there are 93.5 males. For every 100 females age 18 and over, th ...