Fluids with Complex Behaviors in Industry

A special issue of Fluids (ISSN 2311-5521). This special issue belongs to the section "Non-Newtonian and Complex Fluids".

Deadline for manuscript submissions: closed (30 June 2023) | Viewed by 1464

Special Issue Editor


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Guest Editor
Department of Mechanical Engineering, Pontificia Universidade Católica-RJ, Rua Marquês de São Vicente 225, Rio de Janeiro 22453-900, Brazil
Interests: yield stress fluids; non-Newtonian flows; rheology

Special Issue Information

Dear Colleagues,

Complex fluids are present in a large number of industrial sectors, from the oil industry to the food, cosmetic and pharmaceutical industries. Viscoelasticity, thixotropy, shear thinning, and yield stress can be present in many fluids found in these industries. Gaining an accurate understanding of the rheology of these fluids is not a simple task; however, it must be addressed in order to obtain optimal products, and to design and optimize fabrication and packing processes. This Special Issue intends to gather contributions focusing on the characterization/rheology and flow of complex fluids employed in a variety of industrial sectors, with the means of presenting the most used and reliable techniques for characterization, and to discuss the complex rheological behavior of such fluids.

Dr. Naccache Monica
Guest Editor

Manuscript Submission Information

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Keywords

  • complex fluids
  • rheology
  • non-Newtonian fluids
  • gels
  • emulsions
  • foams
  • suspensions

Published Papers (1 paper)

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Research

23 pages, 12630 KiB  
Article
Non-Darcian Displacement of Oil by a Micellar Solution in Fractal Porous Media
by Rafael Ramírez-Casco, René O. Vargas, Carlos Lira-Galeana, Edgar Ramírez-Jaramillo, Marcos Turcio and Octavio Manero
Fluids 2022, 7(12), 377; https://doi.org/10.3390/fluids7120377 - 7 Dec 2022
Viewed by 1119
Abstract
A Buckley–Leverett analysis with capillary pressure to model the oil displacement in fractal porous media is herein presented. The effective permeability for a non-Newtonian micellar fluid is calculated by a constitutive equation used to describe the rheological properties of a displacement fluid. The [...] Read more.
A Buckley–Leverett analysis with capillary pressure to model the oil displacement in fractal porous media is herein presented. The effective permeability for a non-Newtonian micellar fluid is calculated by a constitutive equation used to describe the rheological properties of a displacement fluid. The main assumption of this model involves a bundle of tortuous capillaries with a size distribution and tortuosity that follow fractal laws. The BMP model predicts two asymptotic (Newtonian) regions at low and high shear and a power-law region between the two Newtonian regions corresponding to a stress plateau. Both the stress at the wall and the fluidity are calculated using an imposed pressure gradient in order to determine the mobility of the solution. We analyze different mobility ratios to describe the behavior of the so-called self-destructive surfactants. Initially, the viscosity of the displacing fluid (micellar solution) is high; however, interactions with the porous media lead to a breakage process and degradation of the surfactant, producing low viscosity. This process is simulated by varying the applied pressure gradient. The resulting equation is of the reaction–diffusion type with various time scales; a shock profile develops in the convective time scale, as in the traditional Buckley-Leverett analysis, while at longer times diffusion effects begin to affect the profile. Predictions include shock profiles and compressive waves. These results may find application when selecting surfactants for enhanced oil recovery processes in oilfields. Full article
(This article belongs to the Special Issue Fluids with Complex Behaviors in Industry)
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