Article
Thermodynamics
Osman Yeler, Mehmet Fevzi Koseoglu
Summary: This study developed a comprehensive mathematical model of a thermoelectric infant incubator with a modular thermoelectric heat pump system, which accurately simulated the heat and mass exchange processes within the system. By integrating this system into a commercial neonatal incubator and comparing the results with experimental data and literature, the accuracy of the model was demonstrated.
APPLIED THERMAL ENGINEERING
(2021)
Article
Thermodynamics
Yundong Tang, Rodolfo C. C. Flesch, Tao Jin, Minhua He
Summary: Magnetic hyperthermia has the potential to induce apoptosis in malignant cells while ensuring the safety of normal cells by exposing bio-tissue containing magnetic nanoparticles to a specific treatment temperature range under a magnetic field. This paper develops a theoretical and mathematical model to evaluate apoptosis behavior in a proposed geometric model for therapy, considering the impact of magnetic and concentration fields on heat production of MNPs and subsequent apoptosis in tumor regions. The study suggests that the proposed approach can effectively predict the apoptosis situation of malignant cells by coupling different physical fields during therapy, and may have implications for the planning of nanofluid hyperthermia.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2021)
Article
Chemistry, Physical
Borys Basok, Borys Davydenko, Anatoliy M. Pavlenko
Summary: This article presents a method for modeling the dynamics of vapor-gas mixture and heat and mass transfer in capillary structures of porous medium with linear microchannel system. The simulation takes into account the temperature differences among solid, liquid, and gas phases.
Article
Engineering, Multidisciplinary
Imran Mokashi, Asif Afzal, Qasem Al-Mdallal, L. Syam Sundar, Sher Afghan Khan, Nur Azam Abdullah, Muhammad Hanafi Azami, C. Ahamed Saleel
Summary: This study investigates the impact of conjugate and non-conjugate boundary conditions on the heat transfer characteristics of battery packs. Numerical analysis reveals that temperature distribution is more uniform under non-conjugate conditions compared to the symmetrical nature indicated. Maintaining a proper balance of thermal conductivity between solid and fluid domains is crucial for preventing uneven thermal stresses in battery packs.
ALEXANDRIA ENGINEERING JOURNAL
(2022)
Article
Thermodynamics
Mengjie Song, Jiang Zhengyong, Dang Chaobin, Jiang Yuyan, Shen Jun, Luo Xiaoyan
Summary: Flow boiling heat transfer in microchannels is widely used to solve the heat dissipation problem of high heat flux devices. Experimental studies and mathematical modeling were conducted to optimize the heat transfer performance of rectangular radial microchannel heat exchangers with and without grooves. The results showed that heat exchangers with grooves had better heat transfer performance and adjusting structural parameters significantly influenced the heat transfer coefficient.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2022)
Article
Thermodynamics
Jinnan Guo, Angui Li, Chi Zhang, Jiaxing Li, Jigang Che, Jing Xiong, Xinqi Jiao
Summary: A heat transfer model was established to analyze the cooling or preheating performance of underground traffic tunnels, using the energy conservation law, boundary layer theory, and field measurement. Field tests showed that the air temperature in the tunnel fluctuated harmonically with time, with decreasing amplitude along the tunnel. The convective heat transfer coefficients were determined under different conditions, and the effective and optimal heat transfer lengths of the tunnel were calculated. This research provides theoretical support for underground traffic tunnels as natural air conditioners.
INTERNATIONAL JOURNAL OF THERMAL SCIENCES
(2023)
Article
Environmental Sciences
Swathi Murthy, Cristian Picioreanu, Michael Kuehl
Summary: Reef building corals have complex structures to maximize photosynthesis while minimizing damage and stress. A multiphysics modeling approach was used to simulate the internal environment of corals, including light, temperature, and oxygen distribution. The model results were consistent with spatial measurements, providing insights into the effect of coral morphology and light scattering on the coral's internal environment.
FRONTIERS IN MARINE SCIENCE
(2023)
Article
Energy & Fuels
Nadya Novarizka Mawuntu, Bao-Qi Mu, Oualid Doukhi, Deok-Jin Lee
Summary: This study focuses on the design and management of battery packs in electric vehicles, introducing a comprehensive battery pack model and an advanced battery management system. Through simulating real-world driving conditions, the safe and efficient operation of the battery pack within electric vehicles is ensured.
Article
Thermodynamics
Minghan Xu, Yosuke Hanawa, Saad Akhtar, Atsushi Sakuma, Jianliang Zhang, Junichi Yoshida, Masakazu Sanada, Yuta Sasaki, Agus P. Sasmito
Summary: We propose a multi-scale solidification framework for pure substances, combining laboratory experiments and mathematical modeling. State-of-the-art thermal control chamber and optical devices are utilized to capture the multi-scale phenomena of solidification. A unified mathematical model is developed to quantitatively examine the solidification process at three scales, and the results show good agreement with experimental data.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2023)
Article
Thermodynamics
Zijun Li, Yu Xu, Rongrong Li, Mintao Jia, Qiaoli Wang, Yin Chen, Rongzi Cai, Ziqing Han
Summary: As underground engineering goes deeper, thermal stresses from high-temperature surrounding rock pose a major challenge. Understanding heat and moisture transfer in roadways is crucial for predicting and improving underground thermal environments. A fully coupled model was developed to simulate non-isothermal flow in roadways, heat transfer in surrounding rock, and moisture transfer driven by water evaporation, validated with field test data. Factors such as initial airflow dehumidification and increased ventilation speed can effectively promote latent heat release and reduce airflow and rock temperatures, especially in higher temperature roadways. This study provides a strong theoretical basis for heat hazard control in underground engineering.
CASE STUDIES IN THERMAL ENGINEERING
(2021)
Review
Green & Sustainable Science & Technology
Saad Akhtar, Minghan Xu, Mohammaderfan Mohit, Agus P. Sasmito
Summary: This article reviews various mathematical approaches used to model droplet freezing at different stages. It analyzes the application of these approaches in pharmaceutical, food, energy storage, meteorology, and process industry fields. The review concludes that while significant progress has been made in macro-scale modeling of droplet solidification, there is a need for further development of holistic mathematical models that incorporate nucleation dynamics.
RENEWABLE & SUSTAINABLE ENERGY REVIEWS
(2023)
Article
Mathematics, Applied
Dipunja Gohain, Bijoy Krishna Taid, Nazibuddin Ahmed
Summary: In this study, the MHD water-based nanofluid flow past an impulsively started infinite vertical plate embedded in a porous medium is investigated, considering ramped velocity and concentration, as well as the presence of Hall effect, thermal radiation, chemical reaction, heat source/sink, and thermal diffusion. The governing equations are solved using the Laplace transform method, and the effects of various embedded parameters on velocity, temperature, and concentration profiles are analyzed through graphical interpretation. The variations of the Nusselt number, Sherwood number, and skin friction are also studied. It is found that higher nanoparticle volume fractions lead to reduced primary and secondary velocities and concentration, while increasing the temperature. Thermal diffusion increases the fluid concentration, and the rate of momentum transfer decreases with an increase in the Hall current parameter.
ZAMM-ZEITSCHRIFT FUR ANGEWANDTE MATHEMATIK UND MECHANIK
(2023)
Article
Multidisciplinary Sciences
Muhammad Abdul Basit, Muhammad Imran, Shan Ali Khan, Abdullah Alhushaybari, R. Sadat, Mohamed R. Ali
Summary: This research article discusses the behavior of 2D non-Newtonian Sutterby nanofluid flow over a parabolic surface. The study examines the impact of different parameters on the concentration, velocity, microorganisms, and temperature profiles of the system using mathematical modeling and numerical computation. The research aims to evaluate the significance of parabolic surfaces for the transport of heat and mass in bio-convective Sutterby nanofluid flow.
SCIENTIFIC REPORTS
(2023)
Article
Food Science & Technology
Zipei Huang, Ankang Kan, Jiaxi Lu, Fuliang Li, Tongzhou Wang
Summary: A mathematical model was established to investigate heat and mass transfer in vacuum cooling of cylindrical vegetables, with eggplants selected as the research target. Comparison of simulated and experimental data was conducted to validate the model, and additional simulation was carried out to study the influence of pressure reduction rate on temperature variation. Results showed that temperature difference tends to decrease with increasing pressure reduction rate, and the simulation data were consistent with experimental values.
INNOVATIVE FOOD SCIENCE & EMERGING TECHNOLOGIES
(2021)
Article
Engineering, Multidisciplinary
Yundong Tang, Jian Zou, Rodolfo C. C. Flesch, Tao Jin
Summary: This study develops a poroelastic model to evaluate the effect of syringe needle size and infusion rate on backflow. The results demonstrate that tissue deformation and infusion pressure are the fundamental reasons for obtaining an irregular solution distribution.
APPLIED MATHEMATICAL MODELLING
(2023)
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)