89
edits
Péclet number (Pe) - Nishanth Saldanha: Difference between revisions
From OpenWetWare
Jump to navigationJump to search
Péclet number (Pe) - Nishanth Saldanha (view source)
Revision as of 11:14, 15 February 2017
, 15 February 2017→Definition
| Line 2: | Line 2: | ||
The Péclet number (Pe) is a dimensionless number that represents the ratio of the convection rate over the diffusion rate in the a convection-diffusion transport system. <sup>[1][2]</sup> | The Péclet number (Pe) is a dimensionless number that represents the ratio of the convection rate over the diffusion rate in the a convection-diffusion transport system. <sup>[1][2]</sup> | ||
<math>Pe = \frac{(Convection \, rate)}{(Diffusion \, rate)}</math> | <math>Pe = \frac{(Convection \, rate)}{(Diffusion \, rate)} = \frac {UL}{D}</math> | ||
U represents linear flow in a control volume, L represents the length scale of the flow and D is the diffusion constant. | |||
This number can also be represented as a ratio of diffusive to convective time scales. | This number can also be represented as a ratio of diffusive to convective time scales. | ||
