# Peclet number

(Difference between revisions)
 Revision as of 04:11, 19 September 2005 (view source)← Older edit Latest revision as of 11:39, 18 December 2008 (view source)Peter (Talk | contribs) m (Reverted edits by SitboRolra (Talk) to last version by Praveen) (5 intermediate revisions not shown) Line 5: Line 5: [/itex] [/itex] + Also :$:[itex] - Also Pe \equiv Re Pr + Pe \equiv Re Pr$ [/itex] Line 12: Line 13: * $U_\infty$ is the freestream velocity * $U_\infty$ is the freestream velocity - * $L$ is the Characteristic Dimension of the problem + * $L$ is the characteristic dimension of the problem - * $\alpha$ is the diffusion coefficient + * $\alpha$ is the thermal diffusion coefficient [[Category: Dimensionless parameters]] [[Category: Dimensionless parameters]]

## Latest revision as of 11:39, 18 December 2008

The Peclet number is defined as

$Pe \equiv \frac{U_\infty L}{\alpha}$

Also

$Pe \equiv Re Pr$

where

• $U_\infty$ is the freestream velocity
• $L$ is the characteristic dimension of the problem
• $\alpha$ is the thermal diffusion coefficient