Article
Engineering, Aerospace
Anjith Kumar, Srikrishna Sahu, T. Sundararajan
Summary: In this study, a novel rotary atomizer with micro-channel grooves is investigated using optical diagnostics. The atomization and spray characteristics are studied, focusing on the effects of air swirler orientation and injector rotational speed. Visualizations of the primary jet breakup process are performed, and the droplet size, number density, and velocity components are measured. The results show that the rotary injector has the potential to dynamically control the spray characteristics as per requirement.
AEROSPACE SCIENCE AND TECHNOLOGY
(2023)
Article
Energy & Fuels
Myeung Hwan Choi, Jeongwoo An, Jaye Koo
Summary: Experimental investigations have determined the mechanism and characteristics of a jet in an L-shape crossflow, providing insights for designing gas turbine engines with higher combustion efficiency.
Article
Engineering, Aerospace
Penghui Li, Dong Yang, Zixuan Fang, Qingfei Fu, Lijun Yang
Summary: The addition of metal particles to gelled fuels can improve their density, calorific value, combustion efficiency, and engine performance. However, it also complicates the rheological properties of gelled fuels, which affects their atomization and combustion. This paper investigates the effects of metal particle concentration on the rheological and atomization characteristics of gelled fuels, using different nozzle structures.
Article
Engineering, Aerospace
Lu-Hao Liu, Huan-Ran Wang, Qing-Fei Fu
Summary: This paper studies the spray and dynamic respond characteristics of a swirl injector under different unsteady experimental conditions. The study shows that the flow pulsation and injector geometric parameters have a significant impact on the atomization features, such as the average liquid sheet thickness and spray angle. The results suggest that the liquid sheet thickness and Sauter Mean Diameter (SMD) amplitude decrease in certain frequency ranges and remain unchanged in others, while both of them increase with the tangential channel diameter and swirl chamber length.
Article
Mechanics
Luhao Liu, Qingfei Fu, Lijun Yang
Summary: This paper describes the atomization process of a liquid sheet generated by a coaxial swirl injector and establishes a theoretical breakup model to predict the Sauter mean diameter (SMD) in the entire spray field. The validity of the model is confirmed through good agreement with experimental data, and the effects of fluid physical properties and flow parameters on the SMD are investigated. The conclusions align well with existing literature.
INTERNATIONAL JOURNAL OF MULTIPHASE FLOW
(2021)
Article
Engineering, Multidisciplinary
Anjith Kumar, T. Sundararajan
Summary: A novel micro-channel based rotary atomizer has been developed to produce a well-dispersed fine spray using spiraling micro-jets and a co-swirl air stream. The breakup process of liquid jets and the characteristics of droplets due to interaction with air stream have been studied. The atomizer is able to provide a nearly uniform fine spray for different flow conditions.
ATOMIZATION AND SPRAYS
(2022)
Review
Environmental Sciences
Ramalingam Senthil, Gunasekaran Arun Vijay
Summary: This article focuses on the spray characteristics of biodiesel, analyzing its physicochemical properties, injection conditions, and injector constraints to understand the atomization features. It also discusses the supporting systems for spray diagnostics and models. The highlighted significant spray challenges and future research direction benefit the fuel and combustion community.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Environmental Sciences
Marek Ochowiak, Sylwia Wlodarczak, Andzelika Krupinska, Magdalena Matuszak, Waldemar Fedak, Grzegorz Ligus, Szymon Kolodziej, Barbara Wasilewska
Summary: This paper investigates the relationship between the effectiveness of disinfectants and the size and distribution of droplets, using a pressure-swirl atomizer and laser diffraction method. The experimental results demonstrate the influence of gas pressure and distance from the atomizer's orifice on the spray angle and distance between the nozzles in the spray curtain.
ENVIRONMENTAL RESEARCH
(2022)
Article
Energy & Fuels
Santiago Cardona, Raul Payri, F. J. Salvador, Jaime Gimeno
Summary: This study investigates the effects of different fuel types, air co-flow rates, fuel mass flow rate, and air co-flow temperature on spray characteristics. The droplet sizes and velocities of n-Heptane, n-Decane, and n-Dodecane sprays were measured using the Microscopic Diffused Back-illumination (MDBI) technique under non-reacting conditions. The predicted Sauter mean diameter (SMD) for different flow conditions was compared with experimental measurements. The findings provide valuable insights into the influence of these parameters on droplet sizes and velocities.
Article
Soil Science
Mingyu Su, Chongxuan Liu, Lian-Ping Wang, Wenjuan Zheng
Summary: In this study, an alternative modelling framework to estimate the saturated hydraulic conductivity (K-sat) of soil was proposed. The framework uses the void ratio and arithmetic mean diameter to estimate K-sat. The results showed that the Sauter mean diameter performed better than other diameter indicators and PTF-based models. This study provides guidance for future empirical relationships between soil water retention curves, other soil properties, and continuous particle size distribution functions.
EUROPEAN JOURNAL OF SOIL SCIENCE
(2022)
Article
Thermodynamics
Mengzhao Chang, Young Soo Yu, Sungwook Park, Suhan Park
Summary: In this study, the spray atomization characteristics of two GDI injectors with different hole arrangements were measured under subcooled and flash-boiling conditions. The results showed that under flash-boiling conditions, the spray droplet diameter significantly decreased and the spatial distribution of SMD became more uniform.
APPLIED THERMAL ENGINEERING
(2022)
Article
Green & Sustainable Science & Technology
Prem Shanker Yadav, Raghvendra Gautam
Summary: This study investigates the spray pattern of biodiesel generated from a pressure swirl atomizer through numerical and experimental analysis, identifying the effects of injection pressure on spray characteristics.
ENVIRONMENTAL PROGRESS & SUSTAINABLE ENERGY
(2022)
Article
Engineering, Aerospace
Wenyuan Zhou, Xu Xu, Qingchun Yang, Ronghui Zhao, Yushu Jin
Summary: The spray characteristics of a liquid-gas pintle injector at different total momentum ratios (TMR) were investigated using experimental and numerical simulation methods. The study focused on the spray pattern, spray angle, droplet diameter, and spatial distribution. The results showed that the spray pattern was mainly influenced by the gas Weber number and could be categorized into three types. The spray angle was controlled by the TMR, with the outer boundary of the spray field enlarging as the TMR increased. The droplet diameter decreased in the spray intermediate area due to the aerodynamic force. The numerical calculations agreed well with the experimental results and provided useful insights into the spray characteristics.
AEROSPACE SCIENCE AND TECHNOLOGY
(2022)
Article
Computer Science, Artificial Intelligence
Haoqi Lilan, Junbing Qian, Nan Pan
Summary: Nozzle spray atomization is a complex physical process, with studies on its effectiveness and droplet size distribution leading to the establishment of experimental mathematical models and simulation research. By utilizing technologies such as high-speed cameras and image processing, the droplet size distribution of the entire atomization field was analyzed based on data from multiple observation areas, providing a basis and reference for controlling the atomization effect.
JOURNAL OF INTELLIGENT & FUZZY SYSTEMS
(2021)
Article
Thermodynamics
S. K. Vankeswaram, R. Sakthikumar, Sivakumar Deivandren, John. D. C. Hu
Summary: This study analyzes the drop size characteristics of fuel sprays from a hybrid airblast atomizer using camelina and jatropha-derived drop-in aviation biofuels. Experimental work is conducted to study the details of hybrid atomization using water at different flow rates. The spray characteristics of four different drop-in aviation biofuels are then examined using the hybrid airblast atomizer. A new correlation is proposed to determine the mean droplet size of alternative aviation fuel sprays.
EXPERIMENTAL THERMAL AND FLUID SCIENCE
(2023)
Article
Mathematics
Sid Ahmed Ould Ahmed Mahmoud, El Moctar Ould Beiba, Fei Zuo
Summary: This work introduces and studies the concepts of n-quasi-m-hypercontractive and n-quasi-m-hyperexpansive operators on a Hilbert space. Some characterizations of these classes of operators are established, and many algebraic and spectral properties related to the members of these classes are extracted from these characterizations.
LINEAR & MULTILINEAR ALGEBRA
(2023)
Article
Clinical Neurology
Hani Chanbour, Lakshmi Suryateja Gangavarapu, Jeffrey W. Chen, Gabriel A. Bendfeldt, Iyan Younus, Mahmoud Ahmed, Steven G. Roth, Leo Y. Luo, Silky Chotai, Amir M. Abtahi, Byron F. Stephens, Scott L. Zuckerman
Summary: This study aims to investigate the incidence of unplanned readmission, identify associated risk factors, and determine the impact of unplanned readmission on long-term outcomes in patients undergoing surgery for cervical spine metastases. The results showed that 15% of patients experienced unplanned readmission, with 33% for surgical reasons and 67% for medical reasons. Preoperative radiation was associated with increased unplanned readmission rate, but readmission had no association with overall survival or local recurrence.
WORLD NEUROSURGERY
(2023)
Article
Medicine, Research & Experimental
Mahmoud S. Ahmed, Ayman B. Farag, Ian N. Boys, Ping Wang, Ivan Menendez-Montes, Ngoc Uyen Nhi Nguyen, Jennifer L. Eitson, Maikke B. Ohlson, Wenchun Fan, Matthew B. McDougal, Katrina Mar, Suwannee Thet, Francisco Ortiz, Soo Young Kim, Ashley Solmonson, Noelle S. Williams, Andrew Lemoff, Ralph J. DeBerardinis, John W. Schoggins, Hesham A. Sadek
Summary: The study aimed to identify therapeutic options for the COVID-19 pandemic through structure-based drug repurposing. FDA-approved drugs were screened for their inhibitory effects against SARS-CoV-2's main protease enzyme (Mpro) substrate-binding pocket. Five promising candidates, including atovaquone and mebendazole, demonstrated antiviral activity against SARS-CoV-2. Atovaquone was also found to potentially inhibit viral replication by targeting host purine metabolism.
BIOMEDICINE & PHARMACOTHERAPY
(2023)
Article
Radiology, Nuclear Medicine & Medical Imaging
Adam D. Yock, Mahmoud Ahmed, Sarah Masick, Manuel Morales-Paliza, Christien Kluwe, Ashwin Shinde, Austin Kirschner, Eric Shinohara
Summary: This study analyzed the clinical experience of CBCT-based daily online adaptive radiotherapy and demonstrated the impact of adaptive triggers on dosimetric and procedural outcomes. The results showed that daily online adaptive radiotherapy improved target coverage in multiple pelvic treatment sites, while the improvement in organ-at-risk metrics was randomly distributed.
JOURNAL OF APPLIED CLINICAL MEDICAL PHYSICS
(2023)
Article
Mechanics
Ahmed Elhanafy, Yasser Abuouf, Samir Elsagheer, Shinichi Ookawara, Mahmoud Ahmed
Summary: Diagnostic technology based on magnetic fields is commonly used in medicine, but exposure to strong electromagnetic fields has adverse effects on patients. This study investigates the effects of external uniform magnetic fields on blood flow in healthy and diseased cases, and determines safe values for field strength. A three-dimensional non-Newtonian flow model is developed to investigate the effects of the magnetic field on shear rate and hematocrit. Numerical simulations are conducted at different field strengths and orientations, and results demonstrate the dominant effect of the magnetic field in the Y-direction.
Article
Clinical Neurology
Hani Chanbour, Jeffrey W. Chen, Lakshmi S. Gangavarapu, Gabriel A. Bendfeldt, Matthew E. LaBarge, Mahmoud Ahmed, Steven G. Roth, Silky Chotai, Leo Y. Luo, Amir M. Abtahi, Byron F. Stephens, Scott L. Zuckerman
Summary: This is a retrospective case-control study that aimed to identify risk factors associated with unplanned readmission after metastatic spine surgery and determine its impact on long-term outcomes. The results showed that postoperative complications were associated with unplanned readmission, and 3-month unplanned readmission was associated with a shorter time to local recurrence and decreased overall survival.
Editorial Material
Pharmacology & Pharmacy
Mahmoud Ahmed, Deok Ryong Kim
FRONTIERS IN PHARMACOLOGY
(2023)
Article
Medicine, General & Internal
Mahmoud Ahmed, Yamini Krishna, Petya Popova, Rose Herbert, Gediminas Sidaras, Anshoo Choudhary, Stephen B. B. Kaye
Summary: This study examined the impact of low-dose propofol sedation on patient reported outcome measures (PROMS) during cataract surgery. The study found that the use of low-dose propofol was associated with reduced pain, needle recall, and blood pressure. The results suggest that propofol can be an effective sedation method for cataract surgery.
JOURNAL OF CLINICAL MEDICINE
(2023)
Review
Medicine, General & Internal
Alfredo Borgia, Vito Romano, Davide Romano, Luca Pagano, Aldo Vagge, Giuseppe Giannaccare, Mahmoud Ahmed, Kunal Gadhvi, Nardine Menassa, Mohammad Ahmad, Stephen Kaye, Giulia Coco
Summary: Astigmatism is a common issue after keratoplasty, and it is important to accurately identify and characterize its type, amount, and direction. Various techniques, including corneal tomography and topo-aberrometry, can be used for evaluation, but alternative methods are available if these instruments are not accessible. This article describes both low-tech and high-tech approaches for detecting post-keratoplasty astigmatism, as well as the management strategies involving suture manipulation.
JOURNAL OF CLINICAL MEDICINE
(2023)
Article
Genetics & Heredity
Dalal Al-Sharshani, Dinesh Velayutham, Muthanna Samara, Reham Gazal, Ayman Al Haj Zen, Mohamed A. Ismail, Mahmoud Ahmed, Gheyath Nasrallah, Salma Younes, Nasser Rizk, Sara Hammuda, M. Walid Qoronfleh, Thomas Farrell, Hatem Zayed, Palli Valapila Abdulrouf, Manar AlDweik, John Paul Ben Silang, Alaa Rahhal, Rana Al-Jurf, Ahmed Mahfouz, Amar Salam, Hilal Al Rifai, Nader I. Al-Dewik
Summary: This study aimed to investigate the association between selected single nucleotide polymorphisms (SNPs) and dyslipidemia, as well as the increased susceptibility risks of cardiovascular diseases, type 2 diabetes mellitus, and non-alcoholic fatty liver disease. The results showed significant differences in genotypic frequencies of six SNPs between dyslipidemia patients and control individuals. These differences were found to be associated with gender, obesity, hypertension, and diabetes.
MOLECULAR GENETICS & GENOMIC MEDICINE
(2023)
Article
Oncology
Trang Huyen Lai, Mahmoud Ahmed, Jin Seok Hwang, Md Entaz Bahar, Trang Minh Pham, Jinsung Yang, Wanil Kim, Rizi Firman Maulidi, Dong-Kun Lee, Dong-Hee Kim, Hyun Joon Kim, Deok Ryong Kim
Summary: Breast cancer is a common tumor type in women with a high fatality rate due to metastasis. Raf kinase inhibitory protein (RKIP) is a potential metastasis suppressor candidate, but its expression is reduced or lost in aggressive cancer variants. This study explores the role of RKIP as an anti-metastatic gene using two breast cancer cell lines with different levels of RKIP expression. The findings suggest a potential strategy to reverse the metastatic capability of breast cancer cells by chemically manipulating RKIP expression.
FRONTIERS IN ONCOLOGY
(2023)
Article
Mathematics, Applied
Naeem Ahmad, E. S. Kamel, Sid Ahmed Ould Ahmed Mahmoud
Summary: In this work, we extend the concept of n-quasi-p-isometric operators from a single operator to multi-dimensional operators. We present new interesting results of these tuples of operators, which expand upon recently published works that focus on a single operator.
Article
Mining & Mineral Processing
Khaled Yassin, Mahmoud Ahmed, Mohamed Gamal Eldin Khalifa, Ayman Aly Hagrass
Summary: Dry magnetic separation is an effective technique for reducing iron in feldspar, especially in arid regions with limited water resources. This study conducted dry magnetic separation experiments on feldspar ore in the Wadi Umm Harjal area in Egypt, successfully removing iron content and improving the quality of the sample to meet industry specifications.
ARCHIVES OF MINING SCIENCES
(2023)
Article
Multidisciplinary Sciences
Sid Ahmed Ould Ahmed Mahmoud, Naeem Ahmad
Summary: In this paper, new classes of operators related to polynomially normal operators are introduced. The first class is m-quasi polynomially normal operators, which includes polynomially normal operators studied in recent papers. A bounded linear operator S is said to be an m-quasi polynomially normal operator if there exists a nontrivial polynomial P and a natural number m satisfying a certain equation. The second class is called polynomially C-normal operators, which includes C-normal operators studied in other papers. An operator S is called a polynomially C-normal operator if there exists a nontrivial polynomial P and a conjugation operator C satisfying a certain equation. The paper presents a detailed study of certain properties of the first class of operators and gives an introduction to the second class.
IRANIAN JOURNAL OF SCIENCE
(2023)
Article
Management
Mahmoud Ahmed
Summary: This paper investigates how women's representation on corporate boards affects financial reporting quality. The study finds that increasing women's representation on boards reduces undue CEO influence over the board and improves accounting quality. However, this effect is only significant in the long run and is attenuated for larger firms and larger boards.
INTERNATIONAL JOURNAL OF DISCLOSURE AND GOVERNANCE
(2023)
