Article
Chemistry, Physical
Le Sun, Qianyun Zhao, Yanmin Zhang, Wei Gao, Dengwei Jing
Summary: The study focused on the rheological behavior of ethanol based nanofluids containing metal oxide nanoparticles, revealing non-Newtonian behavior with viscosity depending strongly on temperature and shear rate. Concentration of nanoparticles primarily affects viscosity rather than shear stress, with little difference observed for different types of nanoparticles. Experimental results fit well with established models, highlighting the validity of Power law model for oxide nanofluids.
JOURNAL OF MOLECULAR LIQUIDS
(2021)
Article
Chemistry, Physical
Jalal Mohammed Zayan, Abdul Khaliq Rasheed, Akbar John, Mohammad Khalid, Ahmad Faris Ismail, Abdul Aabid, Muneer Baig
Summary: This study investigates the rheological behavior of water-based GO-TiO2-Ag and rGO-TiO2-Ag ternary-hybrid nanofluids, revealing that the viscosity and shear stress are influenced by the volumetric concentration and temperature of the nanoparticles.
Article
Chemistry, Physical
A. Gomez-Merino, J. J. Jimenez-Galea, M. H. Spillman-Daniele, F. J. Rubio-Hernandez
Summary: The thermomechanical properties of a fluid can be enhanced by adding nanoparticles, with applications in various fields. The study found that solid concentration has a greater impact on thermal conductivity than temperature, and the shear-thickening effect weakens with increasing temperature.
JOURNAL OF MOLECULAR LIQUIDS
(2021)
Article
Green & Sustainable Science & Technology
Mamdouh T. Ghannam, Mohamed Y. E. Selim
Summary: The experimental results demonstrate that the flow behavior of jojoba oil biofuel decreases gradually at different operating temperatures and the viscosity significantly decreases with decreasing shear rate and temperature. Based on these findings, a suitable model is developed to predict the viscosity characteristics of the biofuel during the heating and cooling cycles of a diesel engine.
Article
Chemistry, Physical
Mohamed Youssry, Sara Al-Abed, Raghad Abu Zannad, Maram M. Meslam, Rahaf Asad
Summary: This study introduces a novel concept of energy harvesting nanofluids composed of hybrid piezoelectric ceramic and polymeric materials (BaTiO3 and PVdF) in PDMS. The development of microstructure and flow-induced structural transitions were elucidated using rheology, rheo-microscope, and impedance spectroscopy. The addition of percolated CNTs enhanced the mechanical and electrical network, leading to improved output voltage (OV). The OV was further increased to approximately 7.5 V by adding traces of PVdF in their hybrid suspensions.
JOURNAL OF MOLECULAR LIQUIDS
(2023)
Article
Engineering, Chemical
Pritam Kumar Das, Zeeshan Ahmed
Summary: In recent years, both experimental and Molecular Dynamics (MD) simulation studies of nanofluids have become increasingly popular among researchers due to their complementary nature. This study aims to investigate the stability, thermal conductivity, and rheological behavior of copper oxide based nanofluids at different particle concentrations and temperatures using both experimental and atomistic approaches. The results show that nanofluids exhibit non-Newtonian behavior and shear thickening. The MD simulation confirms the presence of a nanolayer and enhanced self-diffusion coefficient of water, contributing to the increased viscosity and thermal conductivity of the nanofluid. The maximum enhancement of thermal conductivity is found to be 7% for CuO-SDS nanofluid at the highest concentration and temperature.
PARTICULATE SCIENCE AND TECHNOLOGY
(2023)
Article
Thermodynamics
Vishal Vora, Rakesh K. Sharma, D. P. Bharambe
Summary: This study investigates the dynamic viscosity and thermal conductivity of castor oil and graphene nanoplatelets/castor oil nanofluids. The results show that as temperature increases, the nanofluids exhibit a significant decrease in dynamic viscosity, while higher concentrations of graphene nanoplatelets moderately increase the dynamic viscosity. Additionally, an enhancement in thermal conductivity is observed with increasing concentrations of graphene nanoplatelets.
INTERNATIONAL JOURNAL OF THERMOPHYSICS
(2023)
Article
Energy & Fuels
Mamdouh T. Ghannam, Mohamed Y. E. Selim, Mona A. M. Khedr, Noor A. G. Bin Taleb, Norah R. Kaalan
Summary: The study experimentally investigated the rheological characteristics of waste and pure lube oils, finding that viscosity decreases gradually with temperature and shear rate due to reduction in intermolecular forces. This understanding is useful for behavior of lubricants and recycling of waste lube oils.
Article
Construction & Building Technology
Chunyu Zhang, Meng Wang, Rentai Liu, Xiuhao Li, Yankai Liu, Peng Jiang, Jia Yan, Zhijing Zhu, Mengjun Chen
Summary: This study analyzed the influence of various factors such as particle size, particle shape, shear rate, and time on the rheological properties of cement-based slurry. The results showed that particle size has a greater impact on the rheological properties compared to particle shape. Additionally, small particle size samples are significantly affected by shear rate, and the rheological parameters increase over time. The study also identified rheological models suitable for different materials and provided recommendations for selecting an appropriate rheological model to evaluate rheological parameters.
CONSTRUCTION AND BUILDING MATERIALS
(2023)
Article
Acoustics
Xu Ma, Alex Kirichek, Ahmad Shakeel, Karel Heller, Deyan Draganov
Summary: The seismic wave velocities in fluid-mud layer are influenced by rheological properties and density, with laboratory measurements providing good estimates of these properties. Studies have shown a positive correlation between shear-wave velocity and yield stress in the fluid-mud layer. Conducting seismic reflection surveys can be more practical for characterizing fluid-mud layers, while applying seismic interferometry can eliminate the influence of water layer above and retrieve reflection responses from within the fluid-mud layer.
JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA
(2021)
Article
Multidisciplinary Sciences
B. Pialot, J. Gachelin, J. Provost, O. Couture
Summary: New processing techniques for manipulating blood at a microfluidic scale are being implemented, with a focus on in-line evaluation and monitoring of blood properties during extracorporeal circulation being a challenging task. This study demonstrates a non-invasive method for measuring blood hematocrit in a sub-millimeter medical tube using the non-Newtonian behavior of blood velocity profile, with promising results on human blood. The simplicity and effectiveness of this approach suggest its potential impact on in-vitro blood processing.
SCIENTIFIC REPORTS
(2021)
Article
Physics, Multidisciplinary
Abderrahim Bakak, Mohamed Lotfi, Rodolphe Heyd, Amine Ammar, Abdelaziz Koumina
Summary: This paper experimentally investigates the dynamic viscosity and rheological properties of two different non-aqueous graphene nano-plates-based nanofluids, focusing on the effects of solid volume fraction and shear rate. The study found that the addition of nanoparticles can produce lubrication effects in some cases, which could be beneficial for heat extraction applications. The Carreau-Yasuda model was successfully applied to fit most of the rheological measurements, and the dependence of dynamic viscosity on graphene volume fraction was analyzed using the model of Vallejo et al.
Article
Construction & Building Technology
Haiqi He, Jiulong Hu, Rui Li, Chenchen Shen, Jianzhong Pei, Bochao Zhou
Summary: In this study, solvent-free SiO2 nanofluids were used to modify asphalt binder to improve the rheological properties. The compatibility between SiO2 NFs and base asphalt binder was found to be better than SiO2 NPs, and the addition of SiO2 NFs slightly reduced rutting resistance at high temperatures while improving fatigue life and low-temperature crack resistance of the asphalt binder.
CONSTRUCTION AND BUILDING MATERIALS
(2021)
Article
Chemistry, Physical
John Shelton, Nanda K. Saini, Syed M. Hasan
Summary: The present study experiments on the rheological properties of Al2O3-TiO2/MO hybrid nanofluids and finds that the flow behavior of the hybrid nanofluids tends to be more Newtonian compared to conventional nanofluids. The study also observes that the ratio of the hybrid mixture of constituent nanoparticle components affect the rheological characteristics of the nanofluids in an intuitive way.
JOURNAL OF MOLECULAR LIQUIDS
(2023)
Article
Engineering, Ocean
Yiqing Xu, Xianwei Zhang, Gang Wang, Xinyu Liu, Lei Yan
Summary: Diatomites, or natural soils containing diatoms, have unique rheological behaviors that significantly contribute to geohazards, especially submarine landslides. This study assessed the rheological characteristics of diatomite and provides valuable references for simulating submarine landslides.
MARINE GEORESOURCES & GEOTECHNOLOGY
(2023)