Article
Engineering, Mechanical
Khalid M. Ramadan, Omar Qisieh, Iskander Tlili
Summary: This work presents a numerical analysis of the effect of thermal creep on gas flow and heat transfer in a microchannel under gas cooling conditions. The results show that thermal creep becomes more pronounced as the wall temperature decreases relative to the inlet gas temperature. The work has concluded that thermal creep causes an increase in the hydrodynamic entrance length and can result in the formation of vortices under certain conditions. The study also found that, for most practical purposes, thermal creep has no tangible effects on the thermal part of the problem.
PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART C-JOURNAL OF MECHANICAL ENGINEERING SCIENCE
(2022)
Article
Thermodynamics
K. M. Ramadan, Mohammed Kamil, I. Tlili, O. Qisieh
Summary: In this study, the numerical simulation of thermal creep effects on fluid flow and heat transfer in microchannel gas flow at low velocities was conducted. The results showed that thermal creep has a significant impact on both velocity and temperature fields as Reynolds number decreases, leading to longer hydrodynamics entrance length. The study also revealed that thermal creep effect on heat exchange between gas and channel wall becomes more significant as Knudsen number decreases.
JOURNAL OF THERMAL SCIENCE AND ENGINEERING APPLICATIONS
(2021)
Article
Mathematics, Applied
Wenlin Zhang, Michal Feckan, Jinrong Wang
Summary: In this paper, the authors establish an approximate system for atmospheric flow in the stratosphere using small parameters and appropriate boundary conditions. They derive a nonlinear vorticity equation to describe the planetary flow and transform the governing equations into differential equations. The authors then apply inequalities to estimate the solutions to the vorticity equation and prove the existence and non-uniqueness of weak solutions.
Article
Engineering, Environmental
Jingzhi Zhang, Li Lei, Huiling Li, Gongming Xin, Xinyu Wang
Summary: This study investigates the effect of micro cavities on liquid-liquid two-phase flow in microchannels using experimental and numerical methods. The results show that the droplets expand and cause pulsating flow in the cavities, and the expansion width and vortex intensity increase with increasing droplet length. The micro cavities can enhance fluid mixing in the microchannels.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Mathematics, Applied
Matthias Kirchhart, Erick Schulz
Summary: This paper discusses the problem of recovering a divergence-free velocity field from a given vorticity on a bounded Lipschitz domain, and proposes a solution approach and method for constructing the stream function. Experiments confirm that the resulting approximations display higher regularity compared to another common approach.
MATHEMATICAL METHODS IN THE APPLIED SCIENCES
(2022)
Article
Thermodynamics
Liangbin Su, Boshu He, Xiangcheng Wu, Feng Hong
Summary: In this paper, the analytical solutions of fully developed slip flow and heat transfer in elliptical microchannels under the H1 boundary condition with velocity slip and temperature jump are obtained. The momentum and energy equations are solved using the separation of variables method, and the coefficient of the velocity profile is calculated using the binomial series twice. A new model is deduced to predict the Poiseuille number, and the closed-form solution of the Nusselt number is derived as a benchmark for other approaches.
INTERNATIONAL JOURNAL OF THERMAL SCIENCES
(2023)
Article
Environmental Sciences
Tzu-Chiang Lee, Chih-Hua Chang, Chii-Jau Tang
Summary: A stream function-vorticity model was used to investigate the viscous shear flow near the bottom during the head-on collision of two solitary waves. The study revealed that the interaction between the waves behaves nonlinearly not only at the free surface but also in the vorticity exchanges near the bottom.
JOURNAL OF COASTAL RESEARCH
(2021)
Article
Mathematics, Applied
Xiaoguang You, Aibin Zang, Yin Li
Summary: By casting Euler-alpha equations into vorticity-stream function formula and obtaining useful estimates from the properties of the vorticity formula in exterior domain, one can establish the global existence and uniqueness of solutions to Euler-alpha equations in 2D exterior domain, with the condition of regular enough initial data.
Article
Thermodynamics
Muhammad Zia Ullah Khan, Bilal Akbar, Ramisha Sajjad, Umair Ahmed Rajput, Sanaullah Mastoi, Emad Uddin, Azhar Hussain, Md Yamin Younis, Fausto Pedro Garcia Marquez, Naveed Akram
Summary: This study investigates heat transfer enhancement in a straight rectangular channel with and without disturbances in the form of dimple protrusions. The results show that circular dimple-protrusion channels are effective for high Reynolds numbers, while through dimple protrusion channels are efficient for intermediate Reynolds numbers. Additionally, the addition of copper oxide nanoparticles improves heat transfer performance in the channels.
CASE STUDIES IN THERMAL ENGINEERING
(2021)
Article
Thermodynamics
Walid Hassen, Lioua Kolsi, Kaouther Ghachem, Mohammed A. Almeshaal, Chemseddine Maatki, Borjini Mohamed
Summary: The study investigates electro-thermo-convection in a square cavity with a hot solid body, using numerical methods. The application of a potential difference between the hot obstacle and the walls eliminates dead zones at the cavity bottom. Results show that changing obstacle shape, injection levels, and applying electrical forces can significantly improve heat transfer efficiency.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2021)
Article
Thermodynamics
Liangbin Su, Boshu He, Gang Wang, Renzheng Xiao, Wan Yu
Summary: This study numerically investigated the influence of the entrance effect on heat transfer characteristics in microchannels. The effects of Knudsen number and Peclet number on the local Nusselt number were considered in the slip flow regime. The numerical results were verified and used to predict the heat transfer performance of simultaneously developing flow. General correlations for apparent friction coefficients and local Nusselt number were proposed.
INTERNATIONAL JOURNAL OF THERMAL SCIENCES
(2022)
Article
Energy & Fuels
Zhiqiang Xin, Xiangyu Kong, Jing Chen
Summary: This study systematically investigates the heat transfer enhancement of a jet from a circular cylinder placed in a three-dimensional microchannel at low Reynolds numbers. The results show that the injection ratio has a significant influence on thermal efficiency, while the change in jet angle has a more pronounced effect on heat transfer performance.
Article
Computer Science, Interdisciplinary Applications
Yan Zhang, Jun Gao, Yu Bai, Qiao Wang, Dezhou Sun, Xiaopeng Sun, Bingbo Lv
Summary: Research on hemorheology and blood flow behavior in non-uniform vessels is crucial for diagnosis and treatment of cardiovascular diseases. This study investigates the hemodynamics in stenotic vessels and provides a reference for clinical operation planning. The fractional Maxwell constitutive equation of blood is constructed using rheological data, and the continuity and momentum equations are established in a two-dimensional cylindrical coordinate system. The numerical solutions of velocity, wall shear stress and intravascular pressure gradient are obtained using the finite difference method and fractional order derivative L1 algorithm. The effects of stenosis degree, stenosis shoulder length, Reynolds numbers and fractional parameter alpha on blood flow characteristics in stenosis are analyzed.
COMPUTER METHODS IN BIOMECHANICS AND BIOMEDICAL ENGINEERING
(2023)
Article
Biochemical Research Methods
Haotian Cha, Hedieh Fallahi, Yuchen Dai, Sharda Yadav, Samith Hettiarachchi, Antony McNamee, Hongjie An, Nan Xiang, Nam-Trung Nguyen, Jun Zhang
Summary: Inertial microfluidics relies on fluid dynamics at high flow speeds, with channel geometry being the critical design parameter. Four basic channel geometries have been proposed and studied extensively. This work explores embedding periodic concave and convex obstacle microstructures in sinusoidal channels, investigating their impact on particle inertial focusing and separation. The results suggest that embedding microstructures brings flexibility to device design and enables high-performance separation.
Article
Thermodynamics
Shabbir Ahmad, Jianchao Cai, Kashif Ali
Summary: This research aims to understand the effect of a magnetic field generated by a nearby dipole on the flow of nanofluid in a cavity. The study shows that the dipole can create new vortices in its vicinity and enhance the Nusselt number. The Reynolds number reduces the Nusselt number along the lower wall and affects the strength of vortices near the dipole location. Increasing the strength of the dipole distorts the symmetry of streamlines and shifts the zone of higher temperature gradient.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2022)
Article
Green & Sustainable Science & Technology
Mohammed Kamil, Khalid M. Ramadan, Abdul Ghani Olabi, Eman Al-Ali, Xiao Ma, Omar Awad
Article
Engineering, Chemical
Basel AL Muallim, Mazlan A. Wahid, Hussein A. Mohammed, Mohammed Kamil, Daryoush Habibi
Article
Environmental Sciences
Omar Awad, Xiao Ma, Mohammed Kamil, Obed M. Ali, Yue Ma, Shijin Shuai
SCIENCE OF THE TOTAL ENVIRONMENT
(2020)
Review
Environmental Sciences
Omar Awad, Xiao Ma, Mohammed Kamil, Obed Majeed Ali, Zhou Zhang, Shijin Shuai
SCIENCE OF THE TOTAL ENVIRONMENT
(2020)
Article
Computer Science, Artificial Intelligence
Zahid Raza, Mohammad Saleh Bataineh, Mark Essa Sukaiti
Summary: Regular plane tessellations play a crucial role in interconnection network design. Zagreb indices and Zagreb connection indices are important topological measures. This paper focuses on computing these connection indices for Hex, Hex-derived, and some honeycomb networks.
JOURNAL OF INTELLIGENT & FUZZY SYSTEMS
(2021)
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
Education & Educational Research
Luai Al Labadi, Mohammad Saleh Bataineh, Nida Siddiqui
Summary: The COVID-19 pandemic has presented a challenging situation for academicians and students worldwide. As the main stakeholders in the education process, students face even more significant challenges during this time. In this paper, the specific challenges faced by mathematics and statistics courses in higher education are analyzed and documented. A survey was conducted among students who have taken these courses mainly in universities in the UAE to analyze the various factors affecting the learning process during the pandemic. The survey results showed that a significant portion of students are satisfied with distance education.
INTERNATIONAL JOURNAL OF MATHEMATICAL EDUCATION IN SCIENCE AND TECHNOLOGY
(2022)
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
Mathematics, Applied
Tomas Vetrik, Mohammed M. M. Jaradat, Mohammad S. Bataineh
Summary: This article solves a challenging problem in Ramsey theory by finding the exact values for every n >= 5 of R(θ(n), W-5).
JOURNAL OF DISCRETE MATHEMATICAL SCIENCES & CRYPTOGRAPHY
(2022)
Article
Mathematics
A. M. M. Jaradat, A. Baniabedalruhman, M. S. Bataineh, M. M. M. Jaradat
Summary: This study addresses the problem of finding Ramsey numbers for theta graphs and complete graphs, specifically closing the problem for each s greater than or equal to 6.
ITALIAN JOURNAL OF PURE AND APPLIED MATHEMATICS
(2021)
Article
Mathematics
Zahid Raza, M. S. Bataineh, M. Asim Ali
Summary: This paper defines special matrices using integer sequences, focusing on their relationship with Pell-Padovan-like sequences and determining upper and lower bounds of their spectral norms.
JORDAN JOURNAL OF MATHEMATICS AND STATISTICS
(2021)
Article
Mathematics
Zahid Raza, M. S. Bataineh
Summary: This study focuses on computing the edge metric dimension of subdivisions of wheel graphs. It compares the metric and edge metric dimensions of graphs obtained after various subdivisions, and constructs families of graphs through the subdivision process. The study provides partial answers to a question posed in the literature.
ASIAN-EUROPEAN JOURNAL OF MATHEMATICS
(2021)
Article
Mathematics
M. M. M. Jaradat, M. S. Bataineh, A. A. Al-Rhayyel, Zead Mustafa
Summary: In this paper, we determine the maximum number of edges in non-bipartite Hamiltonian graphs on sufficiently large odd n without containing specific graphs as subgraphs, confirming a conjecture made in a previous work for k = 3.
BOLETIM SOCIEDADE PARANAENSE DE MATEMATICA
(2021)
Review
Engineering, Multidisciplinary
Mohamed Alawadhi, Jumah Almazrouie, Mohammed Kamil, Khalil Abdelrazek Khalil
INTERNATIONAL JOURNAL OF SYSTEM ASSURANCE ENGINEERING AND MANAGEMENT
(2020)
Review
Engineering, Multidisciplinary
Mohamed Alawadhi, Jumah Almazrouie, Mohammed Kamil, Khalil Abdelrazek Khalil
INTERNATIONAL JOURNAL OF SYSTEM ASSURANCE ENGINEERING AND MANAGEMENT
(2020)