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Processes
Special Issues
Recent Advances in Non-Newtonian Fluid Flows and Pumping of Concrete
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Recent Advances in Non-Newtonian Fluid Flows and Pumping of Concrete

A special issue of Processes (ISSN 2227-9717). This special issue belongs to the section "Materials Processes".

Deadline for manuscript submissions: closed (30 September 2023) | Viewed by 2909

Special Issue Editors

Dr. Yanwei Wang

E-Mail Website
Guest Editor
1. Department of Chemical and Materials Engineering, School of Engineering and Digital Sciences, Nazarbayev University, Astana 010000, Kazakhstan
2. Laboratory of Computational Materials Science, Center for Energy and Advanced Materials Science, National Laboratory Astana, Astana 010000, Kazakhstan
Interests: transport processes; composite materials; macromolecular theory and simulations; computational molecular and materials research
Dr. Mengyuan Li

E-Mail Website
Guest Editor
1. BGRIMM Technology Group, Beijing 100160, China
2. National Centre for International Research on Green Metal Mining, Beijing 102628, China
Interests: rheological properties; non-Newtonian fluid; cement-based materials; pipeline transportation; cemented filling materials

Special Issue Information

Dear Colleagues,

Non-Newtonian fluid dynamics, rheology, and materials processing are inexorably intertwined. Interest in paints, plastics, ceramic pastes, lubricants, and other industrial fluids led to the founding of the Society of Rheology in December 1929. Flow is essential to characterizing many rheological properties of a fluid and is also ubiquitous in materials processing, manufacturing, and product development.

This Special Issue on “Recent Advances in Non-Newtonian Fluid Flows and Pumping of Concrete” seeks high-quality research or review articles focusing on non-Newtonian fluid dynamics, rheology, and the materials processing of yield-stress fluids. Yield-stress fluids are encountered in a wide range of applications: the pumping of concrete and mortar, 3D concrete printing, the handling of drilling fluids, sludge treatment and disposal, oil-well cementing, filling slurry, toothpaste, foam, mud, mayonnaise, etc. Among them, concrete is used more than any other man-made material in the world and is irreplaceable for innumerable large infrastructure developments. The pumping of concrete is one of the most common practices in the field of construction and is a common step in digital fabrication techniques with concrete and other cementitious materials, such as 3D Concrete Printing (3DCP). However, a fundamental understanding of the interrelations of non-Newtonian fluid dynamics, rheology, and the processing of concrete and other similar fluids remains an active area of research. This Special Issue welcomes topics including, but not limited to:

  • Rheological properties of cement-based materials, filling slurry, drilling fluids, sewage sludge, muds, etc.
  • 3D concrete/slurry printing processes.
  • Flow behavior of concrete during pumping and/or 3D printing.
  • Pumping prediction models and validations.
  • Interrelations of non-Newtonian fluid dynamics, rheology, and the processing of concrete and other similar fluids.
  • Test methods to characterize concrete rheology and lubrication layer properties.
  • Changes in materials properties induced by pumping/processing.
  • Long-distance slurry pipeline transportation and filling processes.
  • Active rheology control and the design of yield-stress fluids.
  • Data-driven and/or physics-driven methods for Non-Newtonian Fluid Flows.
  • Digital twins for non-Newtonian fluids.
  • Advances in experimental, theoretical, and computational studies of yield-stress fluids.
  • New technologies and perspectives in Non-Newtonian Fluid Flows and the processing of yield-stress fluids.

Dr. Yanwei Wang
Dr. Mengyuan Li
Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Processes is an international peer-reviewed open access monthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2400 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • non-Newtonian fluids
  • pipe flow
  • transport processes
  • concrete
  • filling slurry
  • rheology
  • thixotropy, tribology
  • elasto-viscoplastic flows
  • flowability
  • 3D printing
  • polymer/particle-based processing
  • active rheology control
  • digital twins
  • experimental
  • computational
  • particle migration
  • lubrication layer
  • automation and digital transformation

Published Papers (2 papers)

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Research

23 pages, 48193 KiB  
Article
Experimental Study on Rheological Properties of Coal Gangue Slurry Based on Response Surface Methodology
by Kaihua Sun and Xiong Wu
Processes 2023, 11(4), 1205; https://doi.org/10.3390/pr11041205 - 14 Apr 2023
Cited by 2 | Viewed by 1029
Abstract
To handle the gangue well and control the settlement of the surface, as well as to reduce the risk of water bleeding, settlement and even blockage and pipe breaking of the gangue slurry in the process of conveying, the rheological characteristics of the [...] Read more.
To handle the gangue well and control the settlement of the surface, as well as to reduce the risk of water bleeding, settlement and even blockage and pipe breaking of the gangue slurry in the process of conveying, the rheological characteristics of the slurry should be studied. The rheological properties of slurry with different concentrations prepared from gangue samples of the Ningtiaota coal mine were tested, and the correlation between the rheological characteristics of the coal gangue filling slurry and three factors, namely the gangue mass fraction, grain gradation and standing time, were studied by a single factor method and response surface methodology. The results show that the fitting curve of the Herschel–Bulkley model is mostly linear, that is, the shear stress of coal gangue paste increases as a function of the shear rate. Therefore, these two concentrations are too small to form a stable network structure to wrap large particles and can easily cause pipe blockage. The yield shear stress and plastic viscosity show an exponential increase with the increasing mass fraction. The shear stress and apparent viscosity of the pastes with mass fractions of 60% and 65%, respectively, increase significantly after 20, 40 and 60 min of standing. According to the comprehensive test results and the response surface, the optimization method is as follows: mass fraction of 72%; aggregate grading for 4.75~1.18 mm particle size is 30%, for 1.18~0.425 mm particle size is 40%, for 0.425~0.075 mm particle size is 10%, for less than 0.075 mm particle size is 20%; with different standing times, the yield shear stress of slurry ranges from 103.02 to 131.645 Pa; and the plastic viscosity ranges from 0.54 to 0.64 Pa.s. With the increase of the standing time, the slurry settlement is relatively small, and is a more ideal gangue slurry proportion. Full article
(This article belongs to the Special Issue Recent Advances in Non-Newtonian Fluid Flows and Pumping of Concrete)
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20 pages, 6104 KiB  
Article
Effects of Mineral Admixtures on the Evolution of Static Yield Stress of Different Composite Pastes
by Yu Liu, Rui Jing and Peiyu Yan
Processes 2023, 11(2), 614; https://doi.org/10.3390/pr11020614 - 17 Feb 2023
Viewed by 1040
Abstract
The effects of different mineral admixtures on the evolution of static yield stress of common composite cementitious material paste and ultra-high-performance concrete (UHPC)-based paste were investigated. The results show that there are obvious differences in the role of mineral admixtures in the common [...] Read more.
The effects of different mineral admixtures on the evolution of static yield stress of common composite cementitious material paste and ultra-high-performance concrete (UHPC)-based paste were investigated. The results show that there are obvious differences in the role of mineral admixtures in the common paste and the UHPC-based paste. Adding mineral admixtures can change the initial static yield stress of the paste by affecting the particle size, particle shape and the charged particles. The addition of mineral admixtures with small particle size such as silica fume and ultrafine slag can increase the initial static yield stress of common paste but reduce that of UHPC-based paste. Adding mineral admixtures changes the evolution of static yield stress of the paste by affecting the particle spacing and the formation and growth rate of hydration products. In turn, the addition of ultrafine slag or silica fume increases the growth of the static yield stress of common paste. Adding slag, fly ash or fly ash microbeads successively reduces the static yield stress of common paste at the later stage. Affected by the content of PCE, the static yield stress of UHPC-based paste containing fly ash microbeads, slag, ultrafine slag and fly ash increases sequentially compared with the blank group at the later stage. The effect of silica fume with different dosages on the evolution of static yield stress of UHPC-based paste is significantly different. Full article
(This article belongs to the Special Issue Recent Advances in Non-Newtonian Fluid Flows and Pumping of Concrete)
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