Deborah Number

Written by Jerry Ratzlaff on . Posted in Dimensionless Numbers

Deborah number, abbreviated as De, a dimensionless number, is the ratio of fluidity of materials under specific flow conditions, primarly used in rheology.

Deborah Number Formula

\(\large{ De = \frac{ t_c }{ t_p }  }\)

Where:

\(\large{ De }\) = Deborah number

\(\large{ t_p }\) = time of observation

\(\large{ t_c }\) = time of relaxation