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Related Concept Videos

Multiple Pipe Systems01:21

Multiple Pipe Systems

Multipipe systems consist of complex configurations of interconnected pipes designed to transport fluids efficiently across intricate networks. They are essential in engineering applications requiring precise control over flow distribution, pressure, and head loss. They are categorized into series, parallel, loop, and network configurations, each distinguished by unique flow characteristics and applications.
Series Configuration
In a series configuration, fluid flows sequentially from one pipe...
Laminar Flow01:27

Laminar Flow

Laminar flow represents a smooth, orderly fluid motion where particles move along parallel paths, resulting in minimal mixing between layers. Streamlined particle paths characterize this flow regime and occur under conditions where viscous forces dominate over inertial forces. The distinction between laminar, transitional, and turbulent flow is primarily determined by the Reynolds number, a dimensionless quantity calculated as:
Superplasticizers01:30

Superplasticizers

Superplasticizers are advanced admixtures that enhance the workability of concrete by lowering the water content without compromising the strength of the material. These substances are highly effective water reducers, improving concrete flow, making it easier to work with, and enabling concrete to reach inaccessible areas or densely reinforced sections without mechanical vibration. The key components in superplasticizers are either sulfonated melamine or naphthalene formaldehyde condensates,...
Major Losses in Pipes01:28

Major Losses in Pipes

When a fluid flows through a pipe, it experiences energy losses due to frictional resistance along the pipe walls, known as major losses. These energy losses result in a pressure drop, which varies based on the flow conditions — whether laminar or turbulent — and the specific physical properties of the fluid and pipe.
Fluid flow can be classified as laminar or turbulent, primarily based on the Reynolds number. This dimensionless number reflects the relative influence of inertial to viscous...
Pumped Concrete01:13

Pumped Concrete

Concrete in large quantities can be pumped across long distances for placing in inaccessible sites. This system comprises a hopper that receives concrete from a mixer, a pump to propel the concrete, and pipelines that facilitate its delivery.
For direct-acting pumps, the concrete enters the pump via the inlet valve under the action of gravity and suction created by the movement of the piston. This concrete is then forced into the pipeline and out through the outlet valve by the forward movement...
Gradually Varying Flow01:29

Gradually Varying Flow

Gradually varying flow (GVF) in open channels describes situations where water depth changes slowly along the channel due to factors like non-uniform bed slope, channel shape variations, or obstructions. This flow type occurs when the depth adjusts gradually to balance gravitational forces, shear forces, and energy requirements, resulting in a low rate of depth change.Characteristics of Gradually Varying FlowGVF is commonly observed in natural streams, rivers, and canals, where flow depth...

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Updated: Jun 18, 2026

A Flow-through Exposure System for Evaluating Suspended Sediments Effects on Aquatic Life
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Rheology modifiers for water-based slurry pipeline transportation: overview, efficiency, and intensification.

Ahmed Alalou1, Mohammed El Asri2, Ahmed Boulahna3

  • 1Applied Organic Chemistry Laboratory, Faculty of Sciences and Technologies, Sidi Mohammed Ben Abdellah University, B.P. 2202 - Imouzzer Road, Fez, Morocco; College of Chemical Sciences and Engineering (CCSE) Applied Chemistry & Engineering Research Center of Excellence (ACER CoE), University Mohammed VI Polytechnic (UM6P), Lot 660, Hay Moulay Rachid, Ben Guerir 43150, Morocco; Linda and Bipin Doshi Chemical and Biochemical Engineering Department, Missouri University of Science and Technology, Rolla, MO 65409, USA.

Advances in Colloid and Interface Science
|June 16, 2026
PubMed
Summary

Chemical additives significantly improve the transport of solids in water-based slurry pipelines by enhancing fluidity and stability. Advanced dispersants and synergistic mixtures offer substantial reductions in apparent viscosity and pipeline pressure drop.

Keywords:
Slurry pipelinecoal-water slurrydispersantrheology modifiersuspension

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Last Updated: Jun 18, 2026

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Challenges in Rheological Characterization of Highly Concentrated Suspensions — A Case Study for Screen-printing Silver Pastes

Published on: April 10, 2017

Area of Science:

  • Materials Science and Engineering
  • Chemical Engineering
  • Colloid and Surface Chemistry

Background:

  • Water-based slurry pipelines are cost-effective and eco-friendly for transporting various solids like coal, minerals, and industrial byproducts.
  • Optimizing slurry properties, particularly at high solids loading, is crucial for efficient pipeline transportation.
  • Rheology modifiers are essential for enhancing slurryability and fluidity.

Purpose of the Study:

  • To comprehensively review the effects of commercial dispersants and novel chemical additives on solid-water slurry rheology.
  • To analyze key performance parameters including rheological characteristics, stability, surface tension, and contact angle.
  • To discuss the adsorption mechanisms of chemical additives on solid particle surfaces.

Main Methods:

  • Literature review of studies investigating rheology modifiers for solid-water slurries.
  • Analysis of rheological data (shear stress, apparent viscosity, yield stress, flow behavior).
  • Evaluation of slurry stability, surface tension, and contact angle measurements.
  • Discussion of additive adsorption mechanisms on solid surfaces.

Main Results:

  • Conventional dispersants reduce apparent viscosity by 20-40%; biosurfactants achieve 30-50% reduction.
  • Advanced graft copolymers and nanoparticle dispersants reduce apparent viscosity by 50-80% at high solids loading (>70wt%).
  • Synergistic additive mixtures can decrease pipeline pressure drop by up to 50%.

Conclusions:

  • The efficiency of chemical additives depends on additive features, solid material surface properties, and slurry characteristics.
  • Advanced dispersants and synergistic mixtures show significant potential for industrial slurry transportation.
  • Critical analysis of methodologies and recommendations for future research are provided.