In:
AIChE Journal, Wiley, Vol. 63, No. 7 ( 2017-07), p. 3132-3140
Abstract:
We provide experimental demonstration that the spread of tracer elements in a tank containing a viscoelastic liquid and agitated by a submerged jet pointing to the base of the tank can be influenced by the relaxation time of the liquid. We analyzed the temporal spreading of the boundary of a tracer‐front in two dimensions using flow visualization at early stages and found that for a given fluid, the evolution of the tracer‐front at various injection velocities follows a universal trajectory when considered on a normalized time scale of , where t is observation time, is injection velocity and is the effective diffusivity of the tracer elements in the medium. For a different fluid, at a given , the trajectory scales with the relaxation time of the fluid. The importance of relaxation time to the evolution of a tracer‐front is something previously unreported. © 2017 American Institute of Chemical Engineers AIChE J , 63: 3132–3140, 2017
Type of Medium:
Online Resource
ISSN:
0001-1541
,
1547-5905
Language:
English
Publisher:
Wiley
Publication Date:
2017
detail.hit.zdb_id:
2020333-0
detail.hit.zdb_id:
240008-X
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