Article
Physics, Applied
M. I. Kopp, V. V. Yanovsky
Summary: Investigating the influence of time-periodic gravitational forces on bio-thermal convection within porous media and exploring the impact of various parameters on heat transfer.
JOURNAL OF APPLIED PHYSICS
(2023)
Article
Engineering, Multidisciplinary
Hossam A. Nabwey, S. M. M. EL-Kabeir, A. M. Rashad, M. M. M. Abdou
Summary: In this study, a mathematical model is developed to visualize the mixed convection boundary layer flow of a nanofluid containing gyrotactic microorganisms past a permeable vertical surface saturated in a porous medium with variable viscosity and velocity slip effects. The model takes into account suction/injection impact and conducts heat and mass transfer analysis. The results show that the motile microorganism number is enhanced for increasing Peclet number estimations, and the behavior of skin friction coefficient, Sherwood number and motile microorganism number differs between injection and suction cases.
ALEXANDRIA ENGINEERING JOURNAL
(2022)
Article
Physics, Fluids & Plasmas
Ruben Mil-Martinez, Rene O. Vargas, Juan P. Escandon, Ildebrando Perez-Reyes, Marcos Turcio, Aldo Gomez-Lopez, Francisco Lopez-Serrano
Summary: This work analyzes the dynamics of the bioconvection process of gravitactic microorganisms enclosed in a rectangular cavity. The effects of the bioconvection Rayleigh number and the heating source on the dynamics of microorganisms are discussed. Numerical simulations are used to obtain results based on streamlines, concentration, and temperature contours for different configurations of heat sources. It is found that microorganisms accumulate in warmer regions and swim through cooler regions to reach the surface.
Review
Biology
Donat-P Haeder, Ruth Hemmersbach
Summary: Human exploration of space faces numerous challenges, and unicellular algae, such as Euglena gracilis, hold potential for various applications. This review highlights the characteristics of Euglena and its responses to gravity. Euglena could be utilized for life support systems in space missions due to its oxygen production, carbon dioxide uptake, and edibility. It also has commercial uses as a food producer and a source of medicines.
Article
Plant Sciences
Kazunari Ozasa, Hyunwoong Kang, Simon Song, Shota Kato, Tomoko Shinomura, Mizuo Maeda
Summary: The study examined gravitaxis and cell multiplication of microalgae, finding different gravitaxis trends in cells after transferring to fresh culture medium. Cells with initially positive gravitaxis showed a higher rate of cell multiplication.
Article
Thermodynamics
Nirmalendu Biswas, Dipak Kumar Mandal, Nirmal K. Manna, Ali Cemal Benim
Summary: This article focuses on the in-depth study of the flow physics in the bioconvection environment with a wavy heated wall in a porous setting and with the application of a magnetic field. Various emerging parameters greatly affect the thermo-magneto-bioconvective process and play critical roles in heat and mass transport dynamics.
Article
Mechanics
Sanghasri Mukhopadhyay, Nicolas Cellier, R. Usha, Marx Chhay, Christian Ruyer-Quil
Summary: The stability and dynamics of a falling liquid film over an anisotropic porous medium are studied. The study finds that anisotropy has a dual effect on the stability of the film, resulting from the enhancement of viscous diffusion at the top Brinkman sublayer and the mitigation of viscous damping in the core Darcy sublayer.
JOURNAL OF FLUID MECHANICS
(2022)
Article
Mechanics
Jabrane Belabid, Karam Allali
Summary: This study numerically investigates the impact of phototactic microorganisms on thermo-bioconvection in a wavy-walled horizontal porous annulus saturated with a Newtonian fluid. The results show that an increase in the amplitude of wall waviness leads to a decrease in the Nusselt number, and influences thermo-bioconvective instabilities as well as flow regime structure.
EUROPEAN JOURNAL OF MECHANICS B-FLUIDS
(2021)
Article
Thermodynamics
Nirmalendu Biswas, Nirmal K. Manna, Dipak Kumar Mandal, Rama Subba Reddy Gorla
Summary: This study investigates magnetohydrodynamic bioconvection caused by the swimming of oxytactic microorganisms in a linearly heated square cavity filled with porous media and Cu-water nanofluid. Numerical solutions of transport equations demonstrate the impact of various governing parameters on fluid flow, temperature distribution, oxygen concentration, and microorganisms population. The findings suggest potential applications in engineering and science, with the unique feature of simultaneous heating and cooling zones along the heated side.
INTERNATIONAL JOURNAL OF NUMERICAL METHODS FOR HEAT & FLUID FLOW
(2021)
Article
Physics, Multidisciplinary
Aina Ramamonjy, Julien Dervaux, Philippe Brunet
Summary: The mechanism of how living organisms seek optimal light conditions, known as phototaxis, plays a crucial role in the production and environmental impact of motile photosynthetic microbes. The population of Chlamydomonas reinhardtii shows a highly sensitive nonlinear response to light.
PHYSICAL REVIEW LETTERS
(2022)
Article
Multidisciplinary Sciences
Nirmalendu Biswas, Dipak Kumar Mandal, Nirmal K. Manna, Ali Cemal Benim
Summary: This study investigates the mixed thermo-bioconvection of magnetically susceptible fluid containing copper nanoparticles and oxytactic bacteria in a novel W-shaped porous cavity. The results show that the shape of the cavity has a significant impact on the heat and mass transfer rate.
SCIENTIFIC REPORTS
(2022)
Article
Thermodynamics
Kohilavani Naganthran, Md Faisal Md Basir, Thirupathi Thumma, Ebenezer Olubunmi Ige, Roslinda Nazar, Iskander Tlili
Summary: This research tackles the issue of free convection past a flat plate in a porous medium, utilizing a scaling group of transformation to achieve similarity solutions and numerical methods for solving the problem. The momentum transportation is strongly dependent on the Darcy number, suction/injection parameter, and Grashof number, while the temperature distribution is influenced by increasing microrotation density within the thermal boundary layer.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2021)
Article
Materials Science, Multidisciplinary
Arpan Garg, Y. D. Sharma, Subit K. Jain
Summary: This paper presents a novel study on the stability of thermo-bioconvection due to gravitactic microorganisms into an anisotropic porous fluid layer saturated with Jeffrey liquid. The impact of various parameters such as mechanical anisotropy, thermal anisotropy, bioconvection Rayleigh-Darcy number, and microorganism concentration on the formation of bioconvection patterns and the size of convective cells is investigated. This study has potential applications in pharmaceutical, bio-mechanics, and microbial enhanced oil recovery (MEOR).
FORCES IN MECHANICS
(2023)
Article
Multidisciplinary Sciences
Arik Dorfman, Aziz Subach, Inon Scharf
Summary: The movement behavior of the Saharan horned viper in its natural habitat is influenced by microhabitat type and slope. The vipers tend to move towards the top of sand dunes and concentrate their foraging behavior in semi-stable areas. Desert rodents, their main prey, show the highest activity in shifting sands.
ROYAL SOCIETY OPEN SCIENCE
(2023)
Article
Zoology
Asuka Takeda-Sakazume, Junko Honjo, Sachia Sasano, Kanae Matsushima, Shoji A. Baba, Yoshihiro Mogami, Masayuki Hatta
Summary: Vertical migration and horizontal dispersion are important strategies in the ecology of planktonic larvae of sedentary corals. This paper reports on the unique vertical swimming behavior of planulae of the Acropora tenuis coral species. The planulae exhibited either exclusive top or bottom localization, with some migrating almost vertically between the two positions. Statistical analysis revealed that the planulae maintained a constant speed while swimming up or down, in contrast to horizontal swimming which involved frequent changes in direction and speed. The bimodal gravitactic behavior of the planulae sheds new light on the dispersal and recruitment of coral larvae.
ZOOLOGICAL SCIENCE
(2023)
Article
Engineering, Environmental
Mouhamed Ndong, David Bird, Tri Nguyen Quang, Rene Kahawita, David Hamilton, Marie Laure de Boutray, Michele Prevost, Sarah Dorner
Review
Food Science & Technology
Noureddine Bouaicha, Christopher O. Miles, Daniel G. Beach, Zineb Labidi, Amina Djabri, Naila Yasmine Benayache, Tri Nguyen-Quang
Article
Agricultural Engineering
Jaemyung Shin, Young K. Chang, Brandon Heung, Tri Nguyen-Quang, Gordon W. Price, Ahmad Al-Mallahi
BIOSYSTEMS ENGINEERING
(2020)
Article
Agriculture, Multidisciplinary
Jaemyung Shin, Young K. Chang, Brandon Heung, Tri Nguyen-Quang, Gordon W. Price, Ahmad Al-Mallahi
Summary: This study utilized Deep Learning models to detect powdery mildew in strawberries, optimizing well-established learners and performing data augmentation to prevent overfitting. The six DL algorithms used showed an average classification accuracy of over 92%, with ResNet-50 performing the best in classification.
COMPUTERS AND ELECTRONICS IN AGRICULTURE
(2021)
Article
Agricultural Engineering
Sabiha Shahid Antora, Young K. Chang, Tri Nguyen-Quang, Brandon Heung
Summary: This project involves the innovation of novel technologies by using an FPGA-based image processing (FIP) device that eliminates the technical limitations of the current agricultural imaging services available in the market and will lead to the development of a market-ready service solution.
Review
Agricultural Engineering
Tri-Dung Nguyen, Tri Nguyen-Quang, Uday Venkatadri, Claver Diallo, Michelle Adams
Summary: The fresh fruit agricultural and distribution sector faces risks and uncertainties from climate change, water scarcity, land-use increase, consumer behavior, and price volatility. Mathematical models, mainly based on linear and mixed integer programming, have been developed to deal with this complexity, with advancements in processor speed and memory leading to increasingly sophisticated models. These models are applied in various areas such as planting, harvest optimization, logistics, and distribution, addressing the perishability of the fresh fruit supply chain and cycle time of cultivation and harvest as important issues.
Article
Statistics & Probability
Qurat ul An Sabir, Uzma Yasmeen, Muhammad Hanif, Tri Nguyen-Quang
ADVANCES AND APPLICATIONS IN STATISTICS
(2020)
Article
Agricultural Engineering
Young K. Chang, Md. Sultan Mahmud, Jaemyung Shin, Tri Nguyen-Quang, Gordon W. Price, Balakrishnan Prithiviraj
Article
Agricultural Engineering
Muhammad Nadeem, Claver Diallo, Tri Nguyen-Quang, Uday Venkatadri, Peter Havard
Proceedings Paper
Computer Science, Artificial Intelligence
Nguyen Hong, Khoa Duc Nguyen, Linh Thuy Thi Nguyen, Tri Quang Nguyen, Hiep Xuan Huynh
PROCEEDINGS OF THE 3RD INTERNATIONAL CONFERENCE ON MACHINE LEARNING AND SOFT COMPUTING (ICMLSC 2019)
(2019)
Article
Agriculture, Multidisciplinary
Muhammad Nadeem, Tri Nguyen-Quang, Claver Diallo, Uday Venkatadri, Peter Havard
PAKISTAN JOURNAL OF AGRICULTURAL SCIENCES
(2019)
Article
Agriculture, Multidisciplinary
Muhammad Nadeem, Young Ki Chang, Uday Venkatadri, Claver Diallo, Peter Havard, Tri Nguyen-Quang
PAKISTAN JOURNAL OF AGRICULTURAL SCIENCES
(2018)
Article
Agricultural Engineering
Tri-Dung Nguyen, Uday Venkatadri, Tri Nguyen-Quang, Claver Diallo, Michelle Adams
Article
Thermodynamics
Mahsa Taghavi, Swapnil Sharma, Vemuri Balakotaiah
Summary: This study investigates the natural convection effects in the insulation layers of spherical storage tanks and their impact on the tanks' performance. The permeability and Rayleigh number of the insulation material are considered as key factors. The results show that as the Rayleigh number increases, new convective cells emerge and cause the cold boundary to approach the external hot boundary. In the case of large temperature differences, multiple solutions may coexist.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2024)
Article
Thermodynamics
Jinyang Xu, Fangjun Hong, Chaoyang Zhang
Summary: This study introduces a self-induced jet impingement device for enhancing pool boiling performance in high power electronic cooling. Through visualization and parametric investigations, the effects of this device on pool boiling performance are studied, revealing the promotion of additional liquid supply and vapor exhausting. The flow rate of the liquid jet is found to positively impact boiling performance.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2024)
Article
Thermodynamics
Wenchao Ke, Yuan Liu, Fissha Biruke Teshome, Zhi Zeng
Summary: Underwater wet laser welding (UWLW) is a promising and labor-saving repair technique. A thermal multi-phase flow model was developed to study the heat transfer, fluid dynamics, and phase transitions during UWLW. The results show that UWLW creates a water keyhole, making the welding environment similar to in air laser welding.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2024)
Article
Thermodynamics
Xingrong Lian, Lin Tian, Zengyao Li, Xinpeng Zhao
Summary: This study investigates the heat transfer mechanisms in natural fiber-derived porous structures and finds that thermal radiation has a significant impact on the thermal conductivity in low-density regions, while natural convection rarely occurs. Insulation materials derived from micron-sized natural fibers can achieve minimum thermal conductivity at specific densities. Strategies to lower the thermal conductivity include increasing porosity and incorporating nanoscale pores using nanosize fibers.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2024)
Article
Thermodynamics
Yasir A. Malik, Kilian Koebschall, Stephan Bansmer, Cameron Tropea, Jeanette Hussong, Philippe Villedieu
Summary: Ice crystal icing is a significant hazard in aviation, and accurate modeling of sticking efficiency is essential. In this study, icing wind tunnel experiments were conducted to quantify the volumetric liquid water fraction, sticking efficiency, and maximum thickness of ice layers. Two measurement techniques, calorimetry and capacitive measurements, were used to measure the liquid water content and distribution in the ice layers. The experiments showed that increasing wet bulb temperatures and substrate heat flux significantly increased sticking efficiency and maximum ice layer thickness.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2024)
Article
Thermodynamics
Jinqi Hu, Tongtong Geng, Kun Wang, Yuanhong Fan, Chunhua Min, Hsien Chin Su
Summary: This study experimentally examined the heat dissipation of vibrating fans and demonstrated its inherent mechanism through numerical simulation. The results showed that the flow fields induced by the vibrating blades exhibited pulsating features and formed large-scale and small-scale vortical structures, significantly improving heat dissipation. The study also identified the impacts of different blade structures and developed a trapezoidal-folding blade, which effectively reduced the maximum temperature of the heat source and alleviated high-temperature failure crisis.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2024)
Article
Thermodynamics
Dan-Dan Su, Xiao-Bin Li, Hong-Na Zhang, Feng-Chen Li
Summary: The boiling heat transfer of low-boiling-point working fluid is a common heat dissipation technology in electronic equipment cooling. This study analyzed the interfacial boiling behavior of R134a under different conditions and found that factors such as the initial thickness of the liquid film, solid-liquid interaction force, and initial temperature significantly affect the boiling mode and thermal resistance.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2024)
Article
Thermodynamics
Jinyi Wu, Dongke Sun, Wei Chen, Zhenhua Chai
Summary: A unified lattice Boltzmann-phase field scheme is proposed to simulate dendrite growth of binary alloys in the presence of melt convection. The effects of various factors on the growth are investigated numerically, and the model is validated through comparisons and examinations.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2024)
Article
Thermodynamics
Shaokun Ge, Ya Ni, Fubao Zhou, Wangzhaonan Shen, Jia Li, Fengqi Guo, Bobo Shi
Summary: This study investigated the temperature distribution of main cables in a suspension bridge during fire scenarios and proposed a prediction model for the maximum temperature of cables in different lane fires. The results showed that vehicle fires in the emergency lane posed a greater thermal threat to the cables.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2024)
Article
Thermodynamics
Shuang-Ying Wu, Shi-Yao Zhou, Lan Xiao, Jia Luo
Summary: This paper investigates the two-phase flow and heat transfer characteristics of low-velocity jet impacting on a cylindrical surface. The study reveals that the heat transfer regimes are non-phase transition and nucleate boiling with the increase of heat transfer rate. The effects of jet impact height and outlet velocity on local surface temperatures are pronounced at the non-phase transition stage. The growth rates of heat transfer rate and liquid loss rate increase significantly from the non-phase transition to nucleate boiling stage.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2024)
Article
Thermodynamics
Emad Hasani Malekshah, Wlodzimierz Wlodzimierz, Miros law Majkut
Summary: Cavitation has significant practical importance and can be controlled by air injection. This study investigates the natural to ventilated cavitation process around a hydrofoil through numerical and experimental methods. The results show that the location and rate of air injection have a meaningful impact on the characteristics of cavitation.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2024)
Article
Thermodynamics
Feriel Yahiat, Pascale Bouvier, Antoine Beauvillier, Serge Russeil, Christophe Andre, Daniel Bougeard
Summary: This study explores the enhancement of mixing performance in laminar flow equipment by investigating the generation of chaotic advection using wall deformations in annular geometries. The findings demonstrate that the combined geometry can achieve perfect mixing at various Reynolds numbers.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2024)
Article
Thermodynamics
Hui He, Ning Lyu, Caihua Liang, Feng Wang, Xiaosong Zhang
Summary: This study investigates the condensation, frosting, and defrosting processes on superhydrophobic surfaces with millimeter-scale structures. The results reveal that the structures can influence the growth and removal of frost crystals, with the bottom grooves creating a frost-free zone and conical edges promoting higher frost crystal heights. Two effective methods for defrosting are observed: hand-lifting the groove and airfoil retraction contraction on protruding structures. This research provides valuable insights into frost formation and defrosting on millimeter-structured superhydrophobic surfaces, with potential applications in anti-frost engineering.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2024)
Article
Thermodynamics
Thiwanka Arepolage, Christophe Verdy, Thibaut Sylvestre, Aymeric Leray, Sebastien Euphrasie
Summary: This study developed two thermal concentrators, one with a 2D design of uniform thickness and another with a 3D design, using the coordinate transformation technique and metamaterials. By structuring the thermal conductor, the desired local density-heat capacity product and anisotropic thermal conductivities were achieved. The homogenized thermal conductivities were obtained from finite element simulations and cylindrical symmetry consideration. A 3D concentrator was fabricated using 3D metal printing and characterized using a thermal camera. Compared to devices that solely consider anisotropic conductivities, the time evolution characteristics of the metadevice designed with coordinate transformation were closer to those of an ideal concentrator.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2024)
Article
Thermodynamics
Liangyuan Cheng, Qingyang Wang, Jinliang Xu
Summary: In this study, we investigated the supercritical heat transfer of CO2 in a horizontal tube with a diameter of 10.0 mm, covering a wide range of pressures, mass fluxes, and heat fluxes. The study revealed a non-monotonic increase in wall temperatures along the flow direction and observed both positive and negative wall temperature differences between the bottom and top tube. The findings were explained by the thermal conduction in the solid wall interacting with the stratified-wavy flow in the tube.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2024)