1997
DOI: 10.1063/1.869262
|View full text |Cite
|
Sign up to set email alerts
|

The conformation change of model polymers in stochastic flow fields: Flow through fixed beds

Abstract: Simulations of the conformation change of model polymers in various steady, anisotropic Gaussian random flow fields are presented. These flow fields have been chosen because they are models for the flow through porous media and have been predicted to be “stochastic strong flows” according to the criteria developed by Shaqfeh and Koch [J. Fluid Mech. 244, 17 (1992)]. To be specific, beyond a certain Deborah number (based on the sampling time of a velocity fluctuation), large average conformation change in the p… Show more

Help me understand this report

Search citation statements

Order By: Relevance

Paper Sections

Select...
2
2
1

Citation Types

0
15
0

Year Published

1998
1998
2023
2023

Publication Types

Select...
5
1

Relationship

1
5

Authors

Journals

citations
Cited by 13 publications
(15 citation statements)
references
References 28 publications
0
15
0
Order By: Relevance
“…32,33,41 All flows with chaotic particle paths, including turbulent flows 42 and the ECS flows, 10,11 have a positive max , as does the Gaussian random flow studied in Ref. 37. Our coupled study of the effect of FENE-P dumbbells on the ECS shows that the polymer begins to strongly affect the flow structure when We Ϸ1/2.…”
Section: Polymers In Lagrangian Time-dependent Flowsmentioning
confidence: 93%
See 1 more Smart Citation
“…32,33,41 All flows with chaotic particle paths, including turbulent flows 42 and the ECS flows, 10,11 have a positive max , as does the Gaussian random flow studied in Ref. 37. Our coupled study of the effect of FENE-P dumbbells on the ECS shows that the polymer begins to strongly affect the flow structure when We Ϸ1/2.…”
Section: Polymers In Lagrangian Time-dependent Flowsmentioning
confidence: 93%
“…A study of FENE dumbbells in steady, Gaussian ran- dom flows shows that stochastic flow fields can produce large conformation changes in the polymer. 37 Again, the conformation change occurs above a critical nominal Weissenberg number. Recent work by Ilg et al 38 studied the dynamics of FENE and FENE-P dumbbells in wall turbulent flow.…”
Section: Polymers In Lagrangian Time-dependent Flowsmentioning
confidence: 99%
“…Even though the mean flow through the bed is uniform and steady, previous work on complex fluids in dilute beds has shown interesting microstructural behavior attributable to fluctuations about the mean velocity. Experimental and theoretical studies have characterized these fiber bed flows as being strong in terms of orienting tracer particles, 1,2 extending polymer molecules, [3][4][5][6] and breaking drops. 7,8 In this work, our main objective is to understand drop breakup mechanisms by using both experimental and computational methods to focus on the near-field interactions between drops and individual fibers within the bed.…”
Section: Introductionmentioning
confidence: 99%
“…The results have implications for the food and agricultural industry, as well as for enhanced oil recovery. Flows of polymers in more general forms of disordered media have been examined (Mosler and Shaqfeh, 1997). Sedimentation and fluidization, which are of importance in the silting of rivers, formation of secondary rocks, and design of chemical reactors and waste treatment plants, have been studied.…”
Section: Stokesian Dynamicsmentioning
confidence: 99%