# Peclet number

(Difference between revisions)
 Revision as of 04:15, 19 September 2005 (view source)m (User talk:Harish gopalan moved to Peclet Number)← Older edit Revision as of 04:31, 19 September 2005 (view source)Praveen (Talk | contribs) Newer edit → Line 13: 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]]

## Revision as of 04:31, 19 September 2005

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