Article
Mechanics
Mahesh Kumar, Jaikishan Mansukhani, Arijeet Tripathy, Pranab Kumar Mondal
Summary: We discuss the bioinspired pumping mechanism in a microfluidic configuration. By demonstrating the kinematics of the proposed membrane function and describing the wall profile developed due to the expansion-contraction phases, we establish that a channel equipped with a single elastic membrane can act as a micropump. We analyze the flow dynamics and show the increased net throughput obtained from the proposed configuration.
Article
Mechanics
Jaikishan Mansukhani, Arijeet Tripathy, Mahesh Kumar, Pranab Kumar Mondal
Summary: This article discusses a novel bioinspired pumping mechanism for non-Newtonian fluids in a microfluidic configuration. By employing lubrication theory and perturbation technique, the study examines the flow structure and net flow rate during the contraction-expansion process of a membrane. The results highlight the significant impact of fluid rheology and membrane kinematics on the pumping capacity.
Article
Thermodynamics
Qi Xia, Liangrui Lin, Zihan Lin, Chen Chen, Weiya Jin, Qibin Liu
Summary: In this paper, a novel solar-driven ammonia decomposition microchannel reactor integrated with a palladium-argentum hydrogen-selective membrane is proposed. The maximum thermochemical conversion efficiency and overall energy efficiency have been obtained, and meaningful investigations on mass and heat transfer limitations are presented.
ENERGY CONVERSION AND MANAGEMENT
(2022)
Article
Thermodynamics
Hong-Wei Li, Tian-Liang Chang, Chang-He Du, Na Huang, Yu-Ting Jia
Summary: This study investigates the effects of an electric field on flow boiling in a microchannel heat sink, demonstrating that the electric field can delay the onset of nucleation boiling, enhance heat transfer, and induce bubble motion and vortices. However, the electric field can also lead to premature drying of the microchannel and sensitivity of heat transfer coefficients to orientation. The study developed a new HTC asymptotic model considering the electric field effects with an error margin of +/- 15% to experimental data.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2021)
Article
Chemistry, Multidisciplinary
Dae Yeon Kim, Seon Yeop Jung, Young Jin Lee, Kyung Hyun Ahn
Summary: In this study, the clogging dynamics in a single micropore were investigated by controlling the surface property of the particle and processing condition. The results showed that the type of particle interaction and the flow rate change had an impact on the deposition area and characteristics. Therefore, controlling the colloidal interaction and hydrodynamic stress can alleviate clogging issues.
Article
Chemistry, Applied
H. Hasan Koybasi, Ahmet K. Avci
Summary: The process of converting syngas to dimethyl ether using a membrane-integrated microchannel reactor with in-situ steam separation was studied. It was found that under appropriate conditions, the use of membranes can improve the conversion rate of CO2 and the yield of DME.
Article
Computer Science, Interdisciplinary Applications
D. S. Bhandari, Dharmendra Tripathi
Summary: This study examines the effects of rheological properties and velocity slip on a membrane-based pumping model for blood fluid. A mathematical model is constructed and analyzed using perturbation method, and the results show the influence of different rheological properties on the pressure and velocity of the pump model. The model provides a framework for designing smart pumps in the fields of biomedical engineering and fluid industries.
COMPUTER METHODS AND PROGRAMS IN BIOMEDICINE
(2023)
Article
Thermodynamics
Thavamani Jeyaraj, Kumar Pankaj
Summary: The study focuses on the prediction of vapour fraction in horizontal microchannels during flow boiling using numerical simulation with different boiling models. Results showed that the mixture model performed best in estimating vapour fraction compared to other models. The findings can provide design guidelines for selecting proper models in simulation work.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2022)
Article
Engineering, Mechanical
Zhipeng Qin, Zuohao Du, Zhaokun Xian, Hui You
Summary: This study investigates the capillary flow in microchannels with grooved structure, comparing hydrophilic and hydrophobic surfaces. A theoretical model is developed to calculate the capillary pressure at various locations within the groove, while experiments are conducted to validate the model. The findings provide insight into the conditions required for unstopped capillary flow and offer a useful tool for designing valves.
JOURNAL OF FLUIDS AND STRUCTURES
(2023)
Article
Chemistry, Analytical
Zhaohui Wang, Weibing Ding, Yiwei Fan, Jian Wang, Jie Chen, Hongxia Wang
Summary: This paper proposes and optimizes an improved flow-focusing microchannel with a constricted continuous phase inlet to increase microbubble generation frequency and reduce microbubble diameter. The experiments show that the improved microchannel can generate smaller diameter microbubbles more effectively under the same capillary number conditions.
Article
Nanoscience & Nanotechnology
Samaneh Ayoubi, Mahdi Khatibi, Seyed Nezameddin Ashrafizadeh
Summary: The study found that electroosmotic flow can effectively reduce fouling of microchannel walls with a porous wall. By decreasing the neutral solute concentration and increasing the Sherwood number, the fouling of microchannel walls can be reduced.
MICROFLUIDICS AND NANOFLUIDICS
(2021)
Article
Geochemistry & Geophysics
Chen Feng, Binghua Cai, Qinggao Feng
Summary: An analytic model is established to depict non-Darcian flow in a finite confined aquifer with an outer barrier boundary, considering wellbore storage and skin effect. A semi-analytical solution is derived based on the Izbash's law and the linearization procedure combined with the Laplace transformation. The results show that the presence of a no-flux outer boundary has no impact on the early-time drawdown, the late-time drawdown in an unlimited confined aquifer is smaller than in a finite confined aquifer with a zero-flux outer boundary, and the flow in the finite confined aquifer cannot reach quasi-steady state, especially with a smaller finite outer boundary radius.
Article
Thermodynamics
Yanhong Sun, Ao Huang, Jinli Lu, Yuyan Jiang
Summary: This study experimentally investigated the heat transfer characteristics and dynamic flow boiling instabilities of ethanol in a rectangular microchannel. The results showed that the inhibition of bubble nucleation caused by large bubbles in the confined space led to a deterioration in heat transfer performance. Higher mass flux resulted in more effective bubble nucleation and better heat transfer. The triggering of flow boiling instability in the microchannel was strongly dependent on quasi-periodical flow phenomenon and multiphase alternation. The thermophysical properties of the working liquid significantly affected the fluctuation amplitude.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2024)
Article
Thermodynamics
Houpei Li, Pega Hrnjak
Summary: In this work, a mechanistic model focusing on annular flow is proposed to predict pressure gradient, void fraction, and heat transfer coefficient in a microchannel tube. Experimental results of six different fluids show that the existing heat transfer models fail to accurately predict the measurements. Therefore, the proposed model starts from the shear balance at the liquid film and vapor core interface and adopts a database approach to enhance prediction accuracy.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2023)
Article
Mechanics
Ki Tae Wolf, J. Brandon Dixon, Alexander Alexeev
Summary: The study found that valves significantly improve pumping efficiency in biomimetic lymphatic systems, especially when pumping against adverse pressure gradients and at low vessel contraction wave speeds. However, the presence of valves also increases viscous resistance, requiring greater work. Optimal valve elasticity can maximize pumping flow rate.
JOURNAL OF FLUID MECHANICS
(2021)
Article
Multidisciplinary Sciences
Ariel Wang, Shulin Cao, Yasser Aboelkassem, Daniela Valdez-Jasso
PHILOSOPHICAL TRANSACTIONS OF THE ROYAL SOCIETY A-MATHEMATICAL PHYSICAL AND ENGINEERING SCIENCES
(2020)
Review
Multidisciplinary Sciences
S. A. Niederer, Y. Aboelkassem, C. D. Cantwell, C. Corrado, S. Coveney, E. M. Cherry, T. Delhaas, F. H. Fenton, A. V. Panfilov, P. Pathmanathan, G. Plank, M. Riabiz, C. H. Roney, R. W. dos Santos, L. Wang
PHILOSOPHICAL TRANSACTIONS OF THE ROYAL SOCIETY A-MATHEMATICAL PHYSICAL AND ENGINEERING SCIENCES
(2020)
Article
Multidisciplinary Sciences
Shulin Cao, Yasser Aboelkassem, Ariel Wang, Daniela Valdez-Jasso, Jeffrey J. Saucerman, Jeffrey H. Omens, Andrew D. McCulloch
PHILOSOPHICAL TRANSACTIONS OF THE ROYAL SOCIETY A-MATHEMATICAL PHYSICAL AND ENGINEERING SCIENCES
(2020)
Review
Multidisciplinary Sciences
Richard H. Clayton, Yasser Aboelkassem, Chris D. Cantwell, Cesare Corrado, Tammo Delhaas, Wouter Huberts, Chon Lok Lei, Haibo Ni, Alexander V. Panfilov, Caroline Roney, Rodrigo Weber dos Santos
PHILOSOPHICAL TRANSACTIONS OF THE ROYAL SOCIETY A-MATHEMATICAL PHYSICAL AND ENGINEERING SCIENCES
(2020)
Review
Multidisciplinary Sciences
Chon Lok Lei, Sanmitra Ghosh, Dominic G. Whittaker, Yasser Aboelkassem, Kylie A. Beattie, Chris D. Cantwell, Tammo Delhaas, Charles Houston, Gustavo Montes Novaes, Alexander V. Panfilov, Pras Pathmanathan, Marina Riabiz, Rodrigo Weber dos Santos, John Walmsley, Keith Worden, Gary R. Mirams, Richard D. Wilkinson
PHILOSOPHICAL TRANSACTIONS OF THE ROYAL SOCIETY A-MATHEMATICAL PHYSICAL AND ENGINEERING SCIENCES
(2020)
Article
Mechanics
Dharmendra Tripathi, V. K. Narla, Yasser Aboelkassem
Article
Biochemistry & Molecular Biology
Kimberly J. McCabe, Yasser Aboelkassem, Abigail E. Teitgen, Gary A. Huber, J. Andrew McCammon, Michael Regnier, Andrew D. McCulloch
ARCHIVES OF BIOCHEMISTRY AND BIOPHYSICS
(2020)
Article
Computer Science, Interdisciplinary Applications
Yasser Aboelkassem, Dragana Savic
Summary: This study introduces a new PSO method for computing parameters in the arterial blood flow model, showing efficiency and accuracy in parameter optimization. By optimizing the parameters, the method is able to recover the pressure waveform in the aorta, offering new possibilities for research in arterial blood flow network.
COMPUTER METHODS AND PROGRAMS IN BIOMEDICINE
(2021)
Article
Physiology
Mohamed A. Bahloul, Yasser Aboelkassem, Taous-Meriem Laleg-Kirati
Summary: This study models the blood flow dynamics in human arteries with hypertension disease using fractional calculus. The proposed mathematical model offers flexibility in characterizing the arterial complex network and improves the understanding of the structural and functional changes in the arteries due to hypertension.
FRONTIERS IN PHYSIOLOGY
(2022)
Article
Mechanics
Yasser Aboelkassem
Summary: This study developed numerical simulation and theoretical solution for the electro-osmotic pumping flow in a microchannel with squeezing and charged walls. The mathematical model was derived based on a strong coupling between the nonlinear Poisson-Boltzmann equation and the flow lubrication theory. The effects of various parameters on the fluid pressure distribution, velocity field, and net flow rate were investigated, and it was found that the induced pumping rate depends strongly on the combined effects of multiple factors.
Article
Ecology
Dharmendra Tripathi, Dinesh Bhandari, Rakesh Kumar, Yasser Aboelkassem
Summary: In this paper, a mathematical model was developed to simulate the transport of viruses in a viscous background flow driven by natural pumping. The model considered two types of respiratory pathogens viruses (SARS-CoV-2 and Influenza A). The virus spread in axial and transverse directions was examined using the Eulerian-Lagrangian approach. Effects of gravity, virtual mass, Basset force, and drag forces on virus transport velocity were studied using the Basset-Boussinesq-Oseen equation. The results highlighted the significant role of forces acting on spherical and non-spherical particles in the virus transmission process. High viscosity was found to slow down virus transport dynamics, while small-sized viruses were identified as highly dangerous and capable of rapid propagation through blood vessels. The mathematical model presented in this study contributes to a better understanding of virus spread dynamics in blood flow.
JOURNAL OF BIOLOGICAL DYNAMICS
(2023)
Meeting Abstract
Biophysics
Yasser Aboelkassem
BIOPHYSICAL JOURNAL
(2023)
Review
Engineering, Biomedical
Quinn Counseller, Yasser Aboelkassem
Summary: Cardiac imaging techniques such as x-ray, CT, MRI, echocardiogram, PET/SPECT allow physicians to detect various heart abnormalities and study the heart's physiology, performance, structure, and function. Technological advancements have provided even more tools for investigating the heart. This review study focuses on MRI and CT, discussing their origin, benefits, downfalls, clinical application, and future advancements in cardiac imaging.
FRONTIERS IN MEDICAL TECHNOLOGY
(2023)
Article
Physics, Fluids & Plasmas
Mahmoud Abdelgalil, Yasser Aboelkassem, Haithem Taha
Summary: The navigation strategy of sperm cells, specifically sea urchin sperm, is a natural implementation of an adaptive control paradigm known as extremum seeking. This discovery deepens our understanding of microorganism taxis and may guide the development of bioinspired miniaturized robots with minimal sensors.
Proceedings Paper
Engineering, Biomedical
Mohamed A. Bahloul, Yasser Aboelkassem, Taous-Meriem Laleg-Kirati
Summary: Arterial compliance plays a crucial role in cardiovascular function, and fractional calculus can accurately describe the complex properties of arterial blood vessels.
2021 43RD ANNUAL INTERNATIONAL CONFERENCE OF THE IEEE ENGINEERING IN MEDICINE & BIOLOGY SOCIETY (EMBC)
(2021)