Article
Thermodynamics
Fahad S. Alkasmoul, Mohammed Asaker, Ahmed Almogbel, Ahmed AlSuwailem
Summary: This study evaluates the thermal and hydraulic performance of different nanofluids in a microchannel heat sink and finds that nanofluids can enhance its thermal performance. However, considering the flow rate and pumping power, the use of nanofluids deteriorates the heat dissipation efficiency of the heat sink, resulting in no beneficial aspects in terms of thermal performance and energy cost.
CASE STUDIES IN THERMAL ENGINEERING
(2022)
Review
Chemistry, Multidisciplinary
Yuwei Wang, Jie Yu, Cong Qi, Wenjie Zhang
Summary: In this paper, the thermophysical properties and thermo-hydraulic performance of nanofluids in microchannels are reviewed, and the methods to improve the heat dissipation capability of microchannel heat sinks are analyzed from both thermal and flow perspectives.
Article
Thermodynamics
Yuwei Wang, Wenzhu Li, Cong Qi, Jie Yu
Summary: This paper applies hierarchical microchannels and nanofluids to enhance the heat dissipation of electronic components. The study considers two types of hierarchical microchannels (rectangular microchannels and circular microchannels), and analyzes three different channel equivalent diameters (microchannel-a, microchannel-b, microchannel-c). In addition, the influence of nanoparticle concentration on pressure drop, cooling uniformity, thermal resistance, and heat transfer coefficient is studied. The results show that different types of microchannels have different characteristics and performance.
THERMAL SCIENCE AND ENGINEERING PROGRESS
(2023)
Article
Chemistry, Multidisciplinary
Yun-Seok Choi, Youn-Jea Kim
Summary: The study analyzed the heat transfer performance of a fin-tube heat exchanger using ferrofluid as a coolant under external magnetic fields, observing changes in the thermal boundary layer and formation of vortices that activate thermal diffusion, enhancing heat transfer efficiency.
APPLIED SCIENCES-BASEL
(2021)
Review
Chemistry, Multidisciplinary
Xiaoyin Li, Fangyang Yuan, Wenma Tian, Chenlong Dai, Xinjun Yang, Dongxiang Wang, Jiyun Du, Wei Yu, Huixin Yuan
Summary: This article reviews the heat transfer enhancement of nanofluids with non-spherical nanoparticles. The authors categorized the non-spherical nanoparticles into three types based on their geometric structures and evaluated their effects on the thermal conductivity and convective heat transfer of nanofluids using experimental data. The research found that non-spherical nanoparticles with large aspect ratios, such as carbon nanotubes/nanofibers/nanowires, exhibited abnormally enhanced thermal conductivity. The enhancement effect on thermal conductivity was approximately 4.5:2.5:1 for the three types of non-spherical nanoparticles. Non-spherical nanoparticles with small aspect ratios, such as nanorods/ellipsoids, showed larger enhancement in thermal conductivity per concentration. The convective heat transfer coefficient was increased by suspending non-spherical nanoparticles in the base fluid, but no significant thermohydraulic performance was observed, particularly for turbulent flows, due to increased pumping power.
APPLIED SCIENCES-BASEL
(2022)
Article
Thermodynamics
Soheil Asaadi, Hamid Abdi
Summary: The heat transfer enhancement in plate-fin heat exchangers using vortex generators with different nanoparticle volume fractions was numerically simulated. Results showed that using nanofluid can increase heat transfer coefficient by 20% and pressure drop by 18% compared to pure water. Among the vortex generator types, MDWP2 exhibited the highest heat transfer performance but also led to the highest pressure drop in the studied range of Reynolds number.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2021)
Article
Energy & Fuels
Mushtaq T. Al-Asadi, Hussein A. Mohammed, Mark C. T. Wilson
Summary: An effective method to enhance heat transfer in mini and micro electronic devices is to use micro-channels with different shapes and vortex generators. Nanofluids, considered to have great potential for heat transfer enhancement, are also a way to improve heat transfer. This article provides a comprehensive review of the research progress on the heat transfer and fluid flow characteristics of nanofluids in different types of micro-channels, both experimentally and numerically. The study found that the optimization of heat transfer enhancement should consider the reduction in pumping power.
Article
Thermodynamics
Huseyin Zahit Demirag, Mehmet Dogan, Atila Abir Igci
Summary: In this study, experimental and numerical investigations were conducted to examine the heat transfer enhancement and friction factor characteristics of a solar air heater with novel type conic vortex generators on the absorber plate. The experimental results showed that the geometrical parameters played a crucial role in the thermal enhancement factor, with the optimum attack angle, blade angle, and scale ratio achieving the highest thermal enhancement factor. The numerical studies used Fluent software to visualize the fluid velocity, vorticity distributions, temperature, and Nusselt number distributions, as well as the pressure distribution of the vortex generators.
INTERNATIONAL JOURNAL OF THERMAL SCIENCES
(2023)
Review
Thermodynamics
Norhazwani Abd Malek, Siti Ujila Masuri, R. Saidur, Che Nor Aiza Jaafar, Eris Elianddy Supeni, Muhammad Anis Khaliquzzama
Summary: This paper reviews the effect of morphology on heat transfer enhancement in nanofluids containing low-dimensional nanomaterials. The impact of morphology on heat transfer in nanofluids is still unclear. By examining experimental and theoretical studies on the effect of morphology on heat transfer enhancement in nanofluids, a better understanding of heat transfer mechanisms can be achieved.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2023)
Article
Thermodynamics
Jiangbo Wang, Ting Fu, Liangcai Zeng, Fue-sang Lien, Xiaolei Deng
Summary: This study investigated the thermal performance of punched rectangular winglet vortex generators in turbulent regime. The results showed that punching holes can reduce heat transfer and friction coefficients, enhance the thermal enhancement factor, and jet flow can improve heat transfer efficiency.
INTERNATIONAL JOURNAL OF THERMAL SCIENCES
(2022)
Article
Thermodynamics
Yang Yang, David S-K Ting, Steve Ray
Summary: The study found that freestream turbulence intensity had the most significant effect on enhancing forced convection, with the local Nu/Nu0 correlating best with turbulent kinetic energy. The maximal averaged Nu/Nu0 over 23 W downstream was observed for Tu = 7% case, within +/- 1 and +/- 4 strip widths cross-stream.
THERMAL SCIENCE AND ENGINEERING PROGRESS
(2021)
Article
Thermodynamics
Yue Yang, JuiKui Mao, Pingting Chen, Feilong Wang, Zecan Tu
Summary: This study compares the heat transfer performance of different VGs configurations through numerical simulations, finding that the downstream common-flow-down configuration of VGs can achieve favorable heat transfer enhancement. By increasing the height of VGs and decreasing the spacing between VGs and the jet, the heat transfer efficiency can be further improved.
APPLIED THERMAL ENGINEERING
(2022)
Article
Mechanics
L. Xia, Y. Hua, J. G. Zheng
Summary: The study investigates leading edge flow separation control over a stalled airfoil using a fluidic oscillator, revealing the interaction between oscillating jet and external crossflow leads to the production of spanwise vortices, mitigating flow separation. It is found that a higher mass flow usually leads to a better flow control performance.
Article
Thermodynamics
Muhammad Bilal Hafeez, Rohul Amin, Kottakkaran Sooppy Nisar, Wasim Jamshed, Abdel-Haleem Abdel-Aty, M. Motawi Khashan
Summary: This article compares the heat transfer enhancement of three different types of nanofluids (TiO2, CuO, and Al2O3) in automobile radiator, showing that Al2O3 nanofluid exhibits the best thermal performance among them.
CASE STUDIES IN THERMAL ENGINEERING
(2021)
Article
Thermodynamics
Young Dal Jeong, Ki Ho Ahn, Min Je Kim, Jae Hwa Lee
Summary: This study proposes a heat transfer system to improve the thermal performance of a channel flow with wall-mounted flexible flags. The effects of the gap distance and bending rigidity on vortex dynamics are examined. The results show that the heat transfer systems under different modes can improve thermal efficiency, but the effects vary.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2022)
Article
Agricultural Engineering
Abdallah Shanableh, Mohamed Abdallah, Adel Tayara, Chaouki Ghenai, Mohammed Kamil, Abrar Inayat, Ahmad Shabib
Summary: This study aimed to determine the bio- and thermo-chemical characteristics of dromedary manure for renewable energy generation and GHG mitigation. The experimental results showed that bio-methane production ranged between 129 and 160 mL of CH4 per gram of volatile solids. Furthermore, a feasibility study indicated that incineration would be more viable for dromedary manure management compared to anaerobic digestion in terms of economic revenue and energy recovery.
BIOMASS & BIOENERGY
(2021)
Article
Engineering, Chemical
Hussein A. Mohammed, Hari B. Vuthaluru, Shaomin Liu
Summary: The study focused on the thermal-hydraulic performance of a PTSC receiver's tube equipped with conical turbulators, aiming to enhance thermal efficiency by using new advanced coolants. The findings showed that using Ag-SWCNT/Syltherm oil significantly augmented the thermal performance, leading to increased thermal and exergetic efficiencies.
JOURNAL OF THE TAIWAN INSTITUTE OF CHEMICAL ENGINEERS
(2021)
Article
Engineering, Chemical
Omer A. Alawi, Haslinda Mohamed Kamar, Omar A. Hussein, A. R. Mallah, Hussein A. Mohammed, Mehdi Khiadani, Ali B. Roomi, S. N. Kazi, Zaher Mundher Yaseen
Summary: This paper investigates the flow and heat transfer over a modulated surface using MWCNTs-TiO2 nanohybrids, exploring the functionalization and morphology analysis of nanomaterials, as well as the thermophysical properties at different weight concentrations to optimize the heat transfer performance. Numerical models are established based on the research findings to predict the average Nusselt number for the nanoparticles' weight concentrations.
Article
Green & Sustainable Science & Technology
K. Farhana, K. Kadirgama, Hussein A. Mohammed, D. Ramasamy, M. Samykano, R. Saidur
Summary: The study shows that using Al2O3 and CNC nanofluids can increase the efficiency of solar collectors, with good to moderate stability performance of the nanofluids. The thermal conductivity of nanofluids increases while viscosity decreases with increasing temperature. Nanofluids have the potential to enhance the efficiency of flat-plate solar collectors.
SUSTAINABLE ENERGY TECHNOLOGIES AND ASSESSMENTS
(2021)
Review
Biotechnology & Applied Microbiology
Parag P. Thakur, Shriram S. Sonawane, Hussein A. Mohammed
Summary: Renewable-energy sources, such as wind and solar power, are being explored to meet the global energy demand. Nanofluids have been proven effective in replacing conventional working fluids in solar collectors, improving their performance. However, stability and agglomeration issues are still major concerns in the application of nanofluids.
CURRENT NANOSCIENCE
(2023)
Article
Energy & Fuels
Mushtaq T. Al-Asadi, Hussein A. Mohammed, Mark C. T. Wilson
Summary: An effective method to enhance heat transfer in mini and micro electronic devices is to use micro-channels with different shapes and vortex generators. Nanofluids, considered to have great potential for heat transfer enhancement, are also a way to improve heat transfer. This article provides a comprehensive review of the research progress on the heat transfer and fluid flow characteristics of nanofluids in different types of micro-channels, both experimentally and numerically. The study found that the optimization of heat transfer enhancement should consider the reduction in pumping power.
Review
Materials Science, Multidisciplinary
Basel Almuallim, W. S. W. Harun, Ihab Jabbar Al Rikabi, Hussein A. Mohammed
Summary: This review presents the principles of designing high thermal conductive polymer nanocomposites and summarizes the factors affecting thermal conductivity. It also explores the potential applications of polymer nanocomposites in AM technologies.
JOURNAL OF MATERIALS SCIENCE
(2022)
Article
Green & Sustainable Science & Technology
Hussein A. Mohammed, Hari B. Vuthaluru, Shaomin Liu
Summary: This article presents a numerical analysis on the thermohydraulic and thermodynamic performance of a parabolic trough solar collector receiver tube equipped with wavy promoters. The results show that the utilization of wavy promoters inside the PTSC's receiver tube can significantly augment the thermal performance, thereby increasing the overall thermal efficiency.
Article
Engineering, Chemical
Maryam Amiraftabi, Mehdi Khiadani, Hussein A. Mohammed, Arslan Arshad
Summary: This study investigates the hydrodynamic characteristics of a shear thinning fluid agitated in a 3D multiphase reactor using a dual helical ribbon impeller. Computational Fluid Dynamics (CFD) simulation and Population Balance Model (PBM) were employed to study gas-liquid interactions at different impeller speeds. Results showed that an increase in rotational speed intensifies bubble breakage and coalescence rates, while the formation of static vortices adversely affects mixing efficiency.
SEPARATION AND PURIFICATION TECHNOLOGY
(2021)
Review
Energy & Fuels
Adil A. M. Omara, Hussein A. Mohammed, Ihab Jabbar Al Rikabi, Mohamed Ali Abuelnour, Abuelnuor A. A. Abuelnuor
Summary: This paper discusses the potential of using PCM to improve the performance of solar chimneys, focusing on enhancing electricity generation and prolonging operation periods of solar chimney power plants. The study highlights the significant impact of PCM's thermal and geometric characteristics on overall chimney performance, with paraffins being the most commonly used PCM materials in the literature. Recommendations for future research directions include economic, environmental, and exergy analysis, as well as optimizing PCM thickness, humidity control, and super-cooling reduction.
Article
Green & Sustainable Science & Technology
Omer A. Alawi, Haslinda Mohamed Kamar, Ali H. Abdelrazek, A. R. Mallah, Hussein A. Mohammed, Aziz Ibrahim Abdulla, Hamed Alwan Gatea, Mehdi Khiadani, S. N. Kazi, Zaher Mundher Yaseen
Summary: This study focuses on the numerical simulation of a three-dimensional inclined tube-on-absorbing sheet solar collector and investigates the impact of different parameters on its thermal efficiency and performance. The results suggest that using distilled water as the working fluid leads to better heat transfer and energy efficiency. The size and volume concentration of the nanofluid also affect the performance, with nanosheet-shaped CuO nanofluids showing the best characteristics.
SUSTAINABLE ENERGY TECHNOLOGIES AND ASSESSMENTS
(2022)
Article
Green & Sustainable Science & Technology
G. Kadirgama, Amit Kumar, Madderla Sandhya, L. Samylingam, D. Ramasamy, K. Kadirgama, Hussein A. Mohammed, M. Samykano, R. Saidur
Summary: Friction and wear are the main causes of energy dissipation in automobile engines. This study aims to enhance the tribological behavior and lubricant properties by using graphene nanoplatelets (GNPs) and cellulose nanocrystals (CNCs) as additives. The characterization is done using different techniques such as X-ray diffractometer (XRD) and field emission scanning electron microscope (FESEM). The results show that the graphene:CNC nano lubricant leads to a smoother surface and more uniform dispersion compared to SAE 40.
Article
Energy & Fuels
Mohammed Ahmed, Mohammed Muhana Meteab, Qusay Oglah Salih, Hussein A. Mohammed, Omer A. Alawi
Summary: This study investigates the thermal-physical and rheological properties of hexagonal boron nitride/carbon nanotubes nanoadditives in enhancing the efficiency of a flat plate solar collector with water-based working fluid. The results show that with optimal mass ratio and flow rate, the efficiency of the solar collector can be remarkably improved by up to 87%.
Article
Energy & Fuels
Mohammed Kamil, Fatima M. M. Almarashda
Summary: This study developed a model for optimal conditions in biodiesel production using desert palm date seeds, and assessed the financial viability of a small-scale biodiesel plant. Biodiesel blends were compared to traditional diesel in terms of technical performance, with biodiesel outperforming in exhaust gas temperature while traditional diesel had higher engine power, thermal efficiency, and fuel economy. The study demonstrates that date seed oil has excellent potential as a feedstock for biodiesel production due to its use of existing waste materials, cleaner performance, and economic viability.
Article
Nanoscience & Nanotechnology
Dieter Rahmadiawan, Navid Aslfattahi, N. Nasruddin, R. Saidur, A. Arifutzzaman, Hussein A. Mohammed
Summary: In this study, MXene was first combined with POME to enhance the thermal properties of nanofluids. Different concentrations of MXene were added to achieve optimal properties, resulting in improved thermal conductivity without affecting viscosity. This research suggests the potential of POME/MXene nanofluids as promising heat transfer fluids.
JOURNAL OF NANO RESEARCH
(2021)
