The thixotropic behavior of sewage sludge is analysed by varying several parameters such as the time of rest, the slope of the shear rate ramp or the data sampling. We observed that only the initial stress overshoot is time-dependent but always appears, for a given material, at the same critical angle which indicates it is linked to elastic effects: during shear, the material has a short memory. The visualisation of the velocity profile within the sheared material confirms this assumption. We also demonstrate that the hysteresis area is highly dependant on the data sampling and cannot be considered as a material characteristic. Finally, we pointed out that shear rate cycles are not the most powerful method to characterize thixotropy.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1016/j.jenvman.2005.04.020 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Minimum 24-Month Outcomes of Minimally Invasive Paratenon Protection Repair vs Open Giftbox Repair of Ruptured Achilles Tendon.
Foot Ankle Int
January 2025
Department of Orthopaedic Surgery, Wuxi Ninth People's Hospital Affiliated to Soochow University, Wuxi, Jiangsu, China.
Background: The paratenon has been shown to promote Achilles tendon healing, but the evidence supporting the role of paratenon protection technique in Achilles tendon repair is sparse. We retrospectively assessed the results of a paratenon-sparing repair technique vs an open giftbox repair of Achilles tendon ruptures.
Methods: Patients with Achilles tendon rupture who underwent surgical treatment at our hospital between January 2015 and August 2021 were retrospectively reviewed.
Molecular foundations for shear-induced dynamics of natural organic matter.
Sci Total Environ
January 2025
Department of Chemical Engineering, Tennessee Technological University, Cookeville, TN, United States. Electronic address:
The overall objective of the present work was to quantify how shear, coupled with varying salt concentration, affected the particle size distribution and relaxation/aggregation behavior for various organic sources of nonliving natural organic matter (NNOM) in surface water. NNOM has been implicated as a conditioning agent leading to the formation of biofilms such as algae. NNOM is also a responsible in surface waters for facilitated transport of a variety of anthropogenic pollutants.
View Article and Find Full Text PDFCrystallization in load-controlled shearing flows of monosized spheres.
Soft Matter
January 2025
Politecnico di Milano, 20133 Milano, Italy.
Identical, inelastic spheres crystallize when sheared between two parallel, bumpy planes under a constant load larger than a minimum value. We investigate the effect of the inter-particle friction coefficient of the sheared particles on the flow dynamics and the crystallization process with discrete element simulations. If the imposed load is about the minimum value to observe crystallization in frictionless spheres, adding small friction to the granular assembly results in a shear band adjacent to one of the planes and one crystallized region, where a plug flow is observed.
View Article and Find Full Text PDFFlaxseed gum nano-microcapsules loaded with secoisolariciresinol diglucoside: Preparation and characterization.
J Food Sci
January 2025
College of Food Science and Engineering, Henan University of Technology, Zhengzhou, China.
Flaxseed gum (FSG) has promising applications in the field of nano/microencapsulation for its biocompatibility and excellent physicochemical properties. In this study, FSG-based nano-microcapsules (FSG NPs) were prepared using high-speed shear homogenization combined with ultrasound for efficient encapsulation of secoisolariciresinol diglucoside (SDG). The particle size of FSG stands for nano-microcapsules (NP) was determined to be 336.
View Article and Find Full Text PDFThe role of fluid friction in streamer formation and biofilm growth.
NPJ Biofilms Microbiomes
January 2025
FLOW, Department of Engineering Mechanics, KTH, Stockholm, Sweden.
Biofilms constitute one of the most common forms of living matter, playing an increasingly important role in technology, health, and ecology. While it is well established that biofilm growth and morphology are highly dependent on the external flow environment, the precise role of fluid friction has remained elusive. We grew Bacillus subtilis biofilms on flat surfaces of a channel in a laminar flow at wall shear stresses spanning one order of magnitude (τ = 0.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!