Article
Thermodynamics
Lenan Zhang, Shuai Gong, Zhengmao Lu, Ping Cheng, Evelyn N. Wang
Summary: A unified bubble departure theory for saturated nucleate pool boiling was developed in this study, taking into consideration the heat transfer in the bubble base region after bubble departure, and two characteristic timescales representing different regimes of bubble sizes were extracted. The results showed good agreement with existing experimental data, providing a unified relationship between bubble departure frequency and diameter for various combinations of heating substrates and working fluids in the saturated nucleate pool boiling regime.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2021)
Article
Thermodynamics
Nitish Kumar, Pradyumna Ghosh, P. Shukla
Summary: Over the past eighty years, numerous researchers have tried to develop models to predict the bubble departure diameter in pool boiling, but these models have consistently shown significant discrepancies with actual experimental values. This study introduces a physics-based simple approximate model that can predict the bubble departure diameter within a range of +/- 25% in the nucleate boiling zone.
INTERNATIONAL COMMUNICATIONS IN HEAT AND MASS TRANSFER
(2021)
Article
Thermodynamics
Swapan Paruya, Jyoti Bhati, Farheen Akhtar
Summary: An improved numerical model was developed to simulate the dynamics of bubble shape and departure in nucleate pool boiling. The model was validated through comparisons with experimental and literature results. Bubble shape was found to be influenced by superheat and Bond number, with direct numerical integration of Young-Laplace working well for spherical bubbles and an approximate analytical solution working better for non-spherical bubbles.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2021)
Article
Thermodynamics
Yanxing Zhao, Maoqiong Gong, Zhaobing Li, Hanwen Xue, Jun Shen
Summary: This study investigates the pool boiling characteristics of methane, ethane, and their mixtures on a horizontal flat surface through visual experiments. The bubble departure diameter is analyzed in relation to the superheat temperature, dimensionless Jacob number, and concentration. A new model is proposed, taking into account the Marangoni force and mass transfer effects, which shows better accuracy than existing correlations.
INTERNATIONAL JOURNAL OF REFRIGERATION
(2022)
Article
Mathematics
Jinfeng Wang, Bingjun Wang, Jing Xie, Ke Lei, Bo Yu, Yuhang Sun
Summary: The study simulated three-dimensional subcooled flow boiling of R134a in a horizontal tube and explored bubble characteristics, identifying five representative bubbles. Results showed that bubble radial velocity is crucial for bubble departure, and heat flux, inlet velocity, and inlet subcooling all influence bubble departure diameter.
Article
Thermodynamics
Robert Pastuszko, Robert Kaniowski, Norbert Dadas, Milena Bedla-Pawlusek
Summary: Pool boiling heat transfer experiments were conducted with ethanol, Novec-649, and FC-72 on surfaces with deep minichannels. Novec-649 and FC-72 produced the highest heat transfer coefficients in 1 mm wide minichannels. All working fluids significantly increased the maximum heat flux, and high-speed imaging techniques were used to record images across the entire surface.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2021)
Article
Thermodynamics
Fatma Sahin, Ahmet Kaya, Erdem Alic, Orhan Aydin
Summary: This study investigates the effect of a mechanical agitator on heat transfer at pool boiling through experimental and numerical methods. The results show that increasing the number of agitator blades and reducing the distance between the agitator and the heater can significantly improve heat transfer efficiency.
INTERNATIONAL COMMUNICATIONS IN HEAT AND MASS TRANSFER
(2022)
Article
Thermodynamics
Amir Mohammad Sharifzadeh, Hesam Moghadasi, Hamed Shakeri, Hamid Saffari
Summary: Pool boiling is a highly effective method for cooling in various industries. In this study, the effect of pore density, thickness, and channels with different diameters on copper metal foams were investigated. The electrodeposition method was used to enhance boiling efficiency, and creating channels with a suitable diameter improved the heat transfer coefficient. However, larger channel diameters reduced the effective surface area and decreased boiling efficiency.
INTERNATIONAL COMMUNICATIONS IN HEAT AND MASS TRANSFER
(2022)
Article
Thermodynamics
Z. G. Xu, J. Qin, G. M. Qu
Summary: This study investigates the pool boiling heat transfer mechanisms in V-shaped grooved porous metals using numerical simulation and experimental research. The results show that porous metals with double V-shaped grooves have a higher bubble departure frequency and better heat transfer performance compared to those with single V-shaped groove or uniform porous metal. The experimental findings validate the numerical results.
INTERNATIONAL JOURNAL OF THERMAL SCIENCES
(2022)
Article
Energy & Fuels
Robert Kaniowski, Robert Pastuszko
Summary: This study investigates pool boiling on enhanced surfaces with microchannels, showing an increase in heat flux and heat transfer coefficient on surfaces with microchannels. The results demonstrate improved heat transfer efficiency with microchannel structures.
Article
Energy & Fuels
Robert Kaniowski, Robert Pastuszko, Egidijus Dragasius, Saulius Baskutis
Summary: In this paper, the pool boiling of ethanol at atmospheric pressure was analyzed and the impact of surface structure on heat transfer performance was studied. The experimental results showed that within a certain range, the width and depth of microchannels have a significant effect on the heat transfer coefficient and heat flux.
Article
Thermodynamics
Israr Ahmad, Atul Ranjan, Manabendra Pathak, Mohd Kaleem Khan
Summary: This study integrates the electrowetting technique to solve the bubble departure problem in pool boiling under low gravity conditions. Using a phase-field-based numerical method with a dynamic contact angle model in COMSOL Multiphysics (V5.3), the bubble dynamics in electrowetting integrated pool boiling for low gravity conditions are analyzed. The electrowetting technique significantly increases the bubble departure frequency and heat transfer rate compared to conventional pool boiling, with the sinusoidal voltage waveform showing the best performance, achieving 119.3% higher bubble departure frequency and a 74.3% heat transfer enhancement.
INTERNATIONAL JOURNAL OF THERMAL SCIENCES
(2023)
Article
Engineering, Chemical
Samane Hamzekhani, Farhad Shahraki, Davood Mohebbi-Kalhori, Mohammad Reza Fardinpour
Summary: Using experimental data, the artificial neural network (ANN) and response surface methodology (RSM) were employed to predict the bubble departure frequency for pool-boiling heat transfer of pure liquids. The effects of various factors on the departure frequency were investigated, with the RSM model found to be more accurate than the ANN model.
CHEMICAL ENGINEERING & TECHNOLOGY
(2022)
Article
Thermodynamics
Il Woong Park, In Yeop Kang, Jia Yu, Yeon-Gun Lee
Summary: This study experimentally measured the bubble lift-off diameter on a flat heated surface under sub-cooled flow boiling conditions, and proposed a modified model that can predict the average size of bubbles.
INTERNATIONAL COMMUNICATIONS IN HEAT AND MASS TRANSFER
(2021)
Article
Thermodynamics
Juan Shi, Dongyang Feng, Zhenqian Chen, Qiang Ma
Summary: In this paper, numerical methods are used to study pool boiling heat transfer on a hydrophilic metal foam surface. The pseudopotential MRT lattice Boltzmann method is employed to solve the flow field, and a finite-difference scheme is used for phase change. The effects of metal foam porosity and pore size on heat transfer are investigated, and boiling curves are obtained to analyze heat transfer performance and bubble behavior at different wall superheats. The model is validated by comparing bubble behavior with experimental results.
APPLIED THERMAL ENGINEERING
(2023)
Article
Chemistry, Physical
Reza Alian Moghadam, S. Mohammad Sajadi, Nidal H. Abu-Hamdeh, Smain Bezzina, Rasool Kalbasi, Arash Karimipour, Ferial Ghaemi, Dumitru Baleanu
Summary: This study investigates the adsorption process of H2O molecules by a porous carbon matrix in the presence of NaCl impurities using molecular dynamics method. The results show that increasing impurities in atomic structures decrease the adsorption capacity of the porous carbon matrix for H2O molecules.
JOURNAL OF MOLECULAR LIQUIDS
(2022)
Article
Chemistry, Physical
Xinglong Liu, Moram A. Fagiry, S. Mohammad Sajadi, Radwan A. Almasri, Arash Karimipour, Zhixiong Li, Dumitru Baleanu, Ferial Ghaemi
Summary: The computational procedure was utilized to investigate the size effect of Fe3O4 nanoparticles on atomic behavior and phenomena of nanoparticles accumulation in a nanochannel under an external magnetic field. The study revealed that the size of nanoparticles played a significant role in the accumulation process, and the presence of an external magnetic field could postpone this event.
JOURNAL OF MOLECULAR LIQUIDS
(2022)
Article
Chemistry, Physical
Mohammad Behzad Botlani Esfahani, S. Mohammad Sajadi, Nidal H. Abu-Hamdeh, Smain Bezzina, Ali Abdollahi, Arash Karimipour, Ferial Ghaemi, Dumitru Baleanu
Summary: The study examined the effects of different concentrations of silver nanoparticles on pool boiling inside deionized water, finding that adding silver nanoparticles can reduce the boiling heat transfer coefficient under certain conditions. Additionally, increasing the concentration can decrease deviations in the boiling heat transfer coefficient at low heat fluxes and increase it at high heat fluxes.
JOURNAL OF MOLECULAR LIQUIDS
(2022)
Article
Mechanics
Jinxiang Xi, Kian Barari, Xiuhua April Si, Mohammad Yaghoub Abdollahzadeh Jamalabadi, Jay Hoon Park, Michael Rein
Summary: Leakage flows caused by poor-fitting masks can significantly decrease mask protection efficiency. This study quantifies the leakage flows around surgical masks with different gap areas and locations. Results show that even a small gap of 1 cm(2) can cause a 17% leakage, while a gap area of 4.3 cm(2) at the nose bridge, which is a common misfit, leads to a leakage of 60%. The increase rate of leakage slows down with increasing gap area, and masks with lower resistance have lower leakage fractions. Gap location has relatively little impact on leakage intensity. Correlations for leakage as a function of gap area were developed for the two tested masks.
Article
Mathematics, Interdisciplinary Applications
Mohammad Yaghoub Abdollahzadeh Jamalabadi
Summary: This paper explores the formation and patterns of craquelure on historical objects, particularly paintings. Optimal rectangular patterns are calculated using the constructal theory, fracture saturation mechanism, and strain energy density approach. The findings can be applied to other types of craquelure patterns and structural conservation work.
CHAOS SOLITONS & FRACTALS
(2022)
Article
Energy & Fuels
Mohammed N. Ajour, Ahmad H. Milyani, Nidal H. Abu-Hamdeh, Arash Karimipour
Summary: This paper investigates the temperature of three lithium-ion battery cells in an air duct using numerical methods. The results show that using an ellipse-shaped battery pack and phase change material (PCM) leads to lower temperatures and higher solid PCM volume fractions compared to a rectangular shape. Additionally, increasing the airflow rate (Re) from 50 to 150 decreases the battery cell temperature and increases the amount of solid PCM. The airflow rate and the shape of the battery pack and PCM have a greater impact on the first battery cell.
JOURNAL OF ENERGY STORAGE
(2022)
Article
Green & Sustainable Science & Technology
Saeed Aghakhani, Masoud Afrand, Arash Karimipour, Rasool Kalbasi, Mohammad Mehdi Razzaghi
Summary: This article presents a modeling study on the cooling of solar panels using a copper tube. The study considers various variables such as tube diameter, number of loops, and flow rate to optimize the performance of the solar panels. The results indicate the conditions that result in the highest electrical efficiency, thermal efficiency, and overall efficiency.
SUSTAINABLE ENERGY TECHNOLOGIES AND ASSESSMENTS
(2022)
Article
Biochemistry & Molecular Biology
Mohammad Yaghoub Abdollahzadeh Jamalabadi, Jinxiang Xi
Summary: Nose-to-brain drug delivery is a new approach that allows medications to directly enter the brain. This study explores the use of acoustic radiation force as an alternative delivery method. The research shows that increasing the pulsating wave frequency can improve the delivery efficiency to the olfactory region.
Article
Chemistry, Physical
Mohamad Shahgholi, Arash Karimipour, Pouya Firouzi, Omid Malekahmadi, Majid Ghashang, Nasier Saadoon, Noor H. Obaid, Shaghayegh Baghaei
Summary: With advances in thermal science, this research focuses on the development of biomedical liquid-flow devices, specifically in the field of dental implant surgery. The study investigates the application of a reinforced hydroxyapatite and titanium dioxide composite in dental implants. Characterization tests and heat transfer investigations were conducted, and an artificial neural network model was trained to predict heat transfer in nanofluids. The research demonstrates that the hydroxyapatite-ethanolamine-titanium dioxide composite shows acceptable heat transfer and physical properties for dental implant applications.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2022)
Review
Green & Sustainable Science & Technology
Babak Aghel, Sara Janati, Somchai Wongwises, Mostafa Safdari Shadloo
Summary: This review article examines the procedure of CO2 removal through chemical amine solvents and the challenges associated with high energy requirements for solvent regeneration. The article investigates two approaches: the development of new solvents and the use of high-capacity amine blends, and the modification of operational conditions and integration with thermal power plants to reduce energy consumption.
INTERNATIONAL JOURNAL OF GREENHOUSE GAS CONTROL
(2022)
Article
Chemistry, Physical
Navid Habibollahi, Ali Abdollahi, Arash Karimipour, Davood Toghraie, Sobhan Emami
Summary: This study investigated the combustion behavior of AlH3 structures coated with various atomic coatings in a liquid oxygen environment. The results showed that adding atomic coatings improved the combustion behavior, increasing the potential energy rates and decreasing the combustion time of the simulated structures. Different coatings resulted in changes in temperature and the number of permeated oxygen atoms.
JOURNAL OF MOLECULAR LIQUIDS
(2022)
Article
Engineering, Multidisciplinary
Kitti Nilpueng, Preecha Kaseethong, Mehrdad Mesgarpour, Mostafa Safdari Shadloo, Somchai Wongwises
Summary: This study introduces a new physics-informed neural network (PINN)-based prediction method to determine the temperature pattern of fluid and fins when flow passes over plate-circular/plate-square pin fin heat sinks. The proposed method is based on calculating the velocity pattern on the fins' surface. After careful validation with experimental data and sensitivity analysis, the thermal behavior of the heat sinks are determined, showing temperature and vorticity differences between different heat sinks.
ENGINEERING ANALYSIS WITH BOUNDARY ELEMENTS
(2022)
Article
Thermodynamics
G. P. Vanitha, U. S. Mahabaleshwar, M. S. Shadloo
Summary: This study investigates the effects of suction/injection, radiation, thermophoresis, and permeable stretching sheet on mixed convection viscoelastic fluid flow and heat transfer. The nondimensionalized dimensional equation is solved analytically to analyze the behavior of physical parameters influencing temperature and concentration field. The results have significant importance in engineering applications where the heat transfer of the fluid is controlled.
INTERNATIONAL COMMUNICATIONS IN HEAT AND MASS TRANSFER
(2022)
Article
Chemistry, Multidisciplinary
Sara Behaien, Babak Aghel, Mostafa Safdari Shadloo
Summary: In this study, biogas was upgraded by removing CO2 using three absorbents in a microchannel system. The effects of operating variables were investigated, and a quadratic model was proposed to predict the response. The experimental values matched the model values well.
KOREAN JOURNAL OF CHEMICAL ENGINEERING
(2023)
Article
Green & Sustainable Science & Technology
Mehrdad Mesgarpour, Omid Mahian, Ping Zhang, Somchai Wongwises, Lian-Ping Wang, Goodarz Ahmadi, Sandro Nizetic, Mikhail Sheremet, Mostafa Safdari Shadlooj
Summary: Sedimentation has a direct impact on the thermal performance and efficiency of thermal systems. This study investigates the deposition of nanoparticles inside a tube for possible application in parabolic solar collectors. A combination of lattice Boltzmann and control finite volume methods is used for realistic simulation, and the results are used to train a deep feed-forward neural network to visualize and predict sedimentation behavior. This research provides valuable insights into particle behavior and parameter variation near the surface, and has implications for predicting service periods and cost savings in heat transfer equipment maintenance.
JOURNAL OF CLEANER PRODUCTION
(2023)
