Article
Thermodynamics
Waqar Ahmed, Z. Z. Chowdhury, S. N. Kazi, Mohd Rafie Bin Johan, Ali H. Abdelrazek, H. Fayaz, Irfan Anjum Badruddin, M. A. Mujtaba, Manzoore Elahi M. Soudagar, Naveed Akram, Shahid Mehmood, Muhammad Shakeel Ahmad, Sarfaraz Kamangar, T. M. Yunus Khan
Summary: This study investigates the thermal and hydrodynamic characteristics of different concentrations of ZnO-DW nanofluids in a closed single-tube circular heat exchanger through experimental and ANSYS modeling methods. The results indicate that the 0.1% ZnO-DW based nanofluids exhibit the highest heat transfer coefficient and efficiency. Both experimental and numerical results show promising and similar outcomes.
CASE STUDIES IN THERMAL ENGINEERING
(2021)
Article
Materials Science, Multidisciplinary
Mehmet Karatas, Yunus Bicen
Summary: Dielectric nanofluids, specifically SiO2 nanoparticle suspensions in mineral oil, have been investigated for their improved dielectric and thermal properties. The addition of nanoparticles leads to an enhancement in AC breakdown voltage and thermal conductivity, but it also results in a decrease in AC breakdown voltage and an increase in viscosity when the critical volume fraction is exceeded.
MATERIALS CHEMISTRY AND PHYSICS
(2023)
Article
Food Science & Technology
Callebe Camelo-Silva, Marcio Augusto Ribeiro Sanches, Renata Moraes Brito, Ivano Alessandro Devilla, Loyse Tussolini, Paula Becker Pertuzatti
Summary: This study aimed to determine the thermophysical properties and antioxidant capacity of buriti pulp with different concentrations of Brix. The results showed that changes in Brix concentration affected the total solids, moisture content, and specific mass of the pulp, but did not influence the specific heat, thermal diffusivity, and thermal conductivity. The antioxidant capacity of buriti pulp varied depending on the method used, with different ranges for the ABTS and DPPH methods.
LWT-FOOD SCIENCE AND TECHNOLOGY
(2021)
Article
Engineering, Geological
Zhao Zhang, Feng Zhang, Rawaz Dlawar Muhammed
Summary: The study on compacted bentonite revealed that the thermal behavior can be divided into three zones based on the air volume fraction, with increasing air volume fraction leading to a significant impact up to a medium level but having little effect at high levels. A new thermal conductivity model was proposed and successfully validated through experiments.
ENGINEERING GEOLOGY
(2021)
Article
Thermodynamics
S. Ramesh Krishnan, V. N. Narayanan Namboothiri
Summary: The development of high-performance thermal systems is crucial for enhancing heat transfer, and the thermal conductivity enhancement of nanofluids depends on various parameters. Increasing volume fraction and temperature may not always result in a proportional enhancement, and factors such as nanoparticle weight and heat transfer effectiveness under specific conditions also play important roles in selecting nanofluids.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2021)
Article
Energy & Fuels
Wagd Ajeeb, S. M. Sohel Murshed
Summary: This study experimentally investigated the thermophysical properties (TPPs) of two new types of nanofluids (SiO2 and BN nanofluids), including thermal conductivity, thermal diffusivity, density, viscosity, and electrical conductivity. The results showed that both types of nanofluids exhibited enhanced thermal conductivity, viscosity, density, and electrical conductivity compared to their base fluids. These nanofluids have great potential for heat transfer applications.
Article
Thermodynamics
Ifeoluwa Wole-Osho, Eric C. Okonkwo, Humphery Adun, Doga Kavaz, Serkan Abbasoglu
Summary: Hybrid nanofluids, consisting of Al2O3-ZnO nanoparticles suspended in distilled water, were investigated for their thermal conductivity in this study. The highest thermal conductivity enhancement was achieved at a mixture ratio of 2:1, while the lowest thermal conductivity was observed at a mixture ratio of 1:1. Different models were compared for predicting the thermal conductivity of the nanofluids, with the adaptive neuro-fuzzy inference system model showing the highest accuracy.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2021)
Article
Chemistry, Multidisciplinary
Mohd Zulkifly Abdullah, Kok Hwa Yu, Hao Yuan Loh, Roslan Kamarudin, Prem Gunnasegaran, Abdusalam Alkhwaji
Summary: The study found that the density, thermal conductivity, and viscosity of Cu-Ni hybrid nanofluids increase with volume fraction, while the specific heat capacity at constant pressure decreases with volume fraction.
Article
Biotechnology & Applied Microbiology
Ubong Williams Robert, Sunday Edet Etuk, Okechukwu Ebuka Agbasi, Grace Peter Umoren, Namdie Joseph Inyang
Summary: Waste generation is a result of human activity and is inevitable. To achieve sustainable development, it is necessary to prevent waste from degrading the economy, environment, and health, and optimize resource utilization through the adoption of the 3Rs principle.
ENVIRONMENTAL TECHNOLOGY & INNOVATION
(2021)
Review
Chemistry, Multidisciplinary
Huan Lin, Fuhua Shen, Jinbo Xu, Lijun Zhang, Shen Xu, Na Liu, Siyi Luo
Summary: In recent years, there has been extensive research on the thermal properties of ultrathin metallic materials due to the continuous development of electronic chips and the increasing integration of devices. Accurate characterization of their thermal transport properties, especially the use of the differential TET technique, has become a research hotspot. This technique allows for high measurement accuracy in characterizing the thermal conductivity, electrical conductivity, and Lorenz number of extremely confined metallic nanostructures. The limitation lies in the availability of existing coating machines that determine the thickness of the metal films, not the measurement technology itself.
Article
Materials Science, Multidisciplinary
Ren-E Dong, Amir Hossein Assari, Saeid Yaghoobi, Maryam Mahmoodi, Sahar Ghaderi
Summary: This study examined the microstructure evolution and thermal properties of Al/Ti composites with different volume fractions of Ti. The results showed that plastic instabilities occurred within the composites, leading to a uniform distribution of Ti fragments in the Al matrix. The grain size of the composites decreased with an increase in Ti content, indicating a gradient in grain size. Furthermore, the thermal properties of the composites increased with temperature but decreased with an increase in passes. However, the thermal conductivity, thermal diffusivity, coefficient of thermal expansion, and specific heat capacity of the composites decreased with an increase in Ti content.
METALS AND MATERIALS INTERNATIONAL
(2023)
Article
Chemistry, Multidisciplinary
Adeola Borode, Thato Tshephe, Peter Olubambi, Mohsen Sharifpur, Josua Meyer
Summary: The study investigated the influence of concentration and temperature on the electrical conductivity, viscosity, and thermal conductivity of GNP/Fe2O3 hybrid nanofluids. Results showed that nanofluids exhibited superior electrical conductivity, viscosity, and thermal conductivity compared to water. The electrical conductivity and thermal conductivity increased linearly with concentration at a constant temperature, while the viscosity of the nanofluid increased with the addition of hybrid nanoparticles and decreased with temperature. Additionally, increasing the addition of hybrid nanoparticles in the base fluid enhanced the thermal conductivity of the nanofluid, and the thermal conductivity ratio increased with the addition of nanoparticles. These findings highlight the potential of GNP/Fe2O3 hybrid nanofluids for improving heat transfer and energy efficiency in various industrial applications.
Article
Chemistry, Multidisciplinary
Norshafiqah Mohd Saidi, Mohd Nurazzi Norizan, Norli Abdullah, Nurjahirah Janudin, Noor Azilah Mohd Kasim, Mohd Junaedy Osman, Imran Syakir Mohamad
Summary: In this study, MWCNTs were chemically modified to introduce surface oxygen functional groups using three acid treatment methods. The modified MWCNTs were characterized using various techniques, and the presence of surface groups significantly affects their properties. The addition of PVP as a stabilizing agent in nanofluid preparation enhanced the dispersion of carbon particles and improved the thermal conductivity compared to nanofluids without PVP.
Article
Chemistry, Physical
Komal Chawla, Jizhe Cai, Dakotah Thompson, Ramathasan Thevamaran
Summary: Thermal transport properties are crucial for lightweight foams used as shock-absorbing layers. This study demonstrates tailored thermal properties achieved by introducing a hexagonally close-packed cylindrical architecture in vertically aligned carbon nanotube (VACNT) foams. The architected VACNTs exhibit higher intrinsic thermal conductivity and lower intrinsic thermal resistance compared to non-architected VACNTs. These superior thermal transport properties enable the development of lightweight protective materials for extreme engineering applications.
Article
Chemistry, Physical
A. G. Gamzatov, A. B. Batdalov, N. Z. Abdulkadirova, A. M. Aliev, V. V. Khovaylo, T. D. Thanh, N. T. Dung, S. -C. Yu
Summary: This paper presents the results of a study on the magnetization, specific heat, thermal diffusivity, thermal conductivity, and magnetocaloric effect of Pr0.7Sr0.3_xBaxMnO3 samples. It is found that the increase in Ba concentration leads to a decrease in Curie temperature, increase in disorder parameter, and noticeable increase in thermal conductivity of the ferromagnetic phase.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
