Article
Thermodynamics
Amin Shahsavar, Seyed Saman Alimohammadi, Ighball Baniasad Askari, Hafiz Muhammad Ali
Summary: The numerical investigation of force convection flow of non-Newtonian water/CMC-CuO NF in three wavy channels and a straight channel was conducted. The study found that the influence of Re and nanoparticle concentration phi on pressure drop, Nu, and global entropy generation rates differed. Increasing Re and decreasing phi resulted in higher Nu values for all four channels, with the sinusoidal channel having the highest Nu. The trapezoidal channel had the highest pressure drop and total global entropy generation rate.
INTERNATIONAL COMMUNICATIONS IN HEAT AND MASS TRANSFER
(2021)
Article
Engineering, Mechanical
Farhad Sadegh Moghanlou, Amin Shams Khorrami, Esmaeil Esmaeilzadeh, Mohammad Vajdi
Summary: This study investigates the heat transfer and pressure drop of Alumina/oil nanofluid flow in a miniaturized square channel under the influence of strong DC electric fields. The results indicate that increasing particle concentration enhances heat transfer, while applying a strong electric potential significantly improves heat transfer efficiency, primarily through the formation of secondary fluid flows and particle motion.
JOURNAL OF THE BRAZILIAN SOCIETY OF MECHANICAL SCIENCES AND ENGINEERING
(2021)
Article
Mechanics
Shihan Guo, Xinhui Si
Summary: This paper applies the log-conformation representation method (LCR) in an orthogonal curvilinear coordinate system to study the flow of Giesekus fluid in a curved duct. It presents derivations for evolution equations of LCR in this coordinate system, and computes secondary flow patterns and oscillation solutions using the collocation spectral method. The influence of Dean number, Weissenberg number, and alpha on fluid behaviors is studied. The paper also discusses the inability of Giesekus fluid flow to retain a four-cell secondary flow pattern in a steady state under certain conditions.
Article
Engineering, Chemical
Zainab Al Hajaj, Mohamad Ziad Saghir
Summary: The study focuses on the heat enhancement effects of flow inside and above mini channels, investigating the distribution of flow under different aspect ratios and the sedimentation of nanoparticles. Results suggest that the optimal configuration considering the friction factor is at an aspect ratio of 12, while the optimal configuration without considering pressure drops is at an aspect ratio of 6, showing the significant impact of flow interaction between the channel and above the channel on heat removal.
Article
Thermodynamics
Uddhaba Biswal, Snehashish Chakraverty, Bata Krushna Ojha, Ahmed Kadhim Hussein
Summary: This study investigates the flow of a fluid with added nanoparticles in a semi-permeable channel under a transverse magnetic effect, utilizing Maxwell-Garnett and Brinkman models. An efficient weighted residual method is proposed for solving coupled differential equations, and residual errors are analyzed for efficiency evaluation. It is found that residual error is almost zero in 6th term approximation under specific parameter values, and validation with previous works confirms the effectiveness of the proposed scheme.
INTERNATIONAL COMMUNICATIONS IN HEAT AND MASS TRANSFER
(2021)
Article
Chemistry, Physical
Honghe Nong, Abdulnasser Mahmood Fatah, S. A. Shehzad, T. Ambreen, Mahmoud M. Selim, Ahmad B. Albadarin
Summary: The research demonstrates steady-state magnetized nanofluid flow under radiative wavy cavity, modeling the porosity term using non-Darcy's theory. The working nanofluid is based on water-Al2O3 nano-powder with 4% concentration, and numerical modeling is estimated via CVFE technique. Results show that increasing media porosity leads to fluid advection decay and conduction dominates over convection in the process.
JOURNAL OF MOLECULAR LIQUIDS
(2021)
Article
Mechanics
Sapna Jain, Surabhi Nishad, Rama Bhargava
Summary: This paper investigates the effect of double diffusion natural convection fluid flow inside a double wavy enclosure using the mesh-free method. The results show that the mass and heat transfer rates increase with an increase in the Rayleigh number and buoyancy ratio, while they decrease with an increase in the thermophoresis parameter, Lewis number, Brownian motion, and power-law index. Such enclosures have applications in heat exchanger devices, double-wall thermal insulation systems, and microelectronic devices.
Article
Thermodynamics
Md Insiat Islam Rabby, Muhammad Ali Rob Sharif, Farzad Hossain
Summary: This study investigates heat transfer in corrugated pipes carrying hybrid nanofluid. The results show that the corrugations considerably enhance the heat transfer. As the Reynolds number and nanoparticle concentration increase, the heat transmission improves, and the pumping power also increases. The change in corrugation height and placement eccentricity significantly affects the heat transfer and pumping power.
CASE STUDIES IN THERMAL ENGINEERING
(2022)
Article
Thermodynamics
Kaouther Ghachem, Walid Aich, Lioua Kolsi
Summary: The study of hybrid nanofluid enhanced heat transfer in a cross flow micro heat exchanger with rectangular wavy channels reveals that choosing the appropriate flow velocity and nanoparticles volume fraction can reduce the size of the heat exchanger, with the addition of nanoparticles having a significant impact only at high velocities. A trade-off between the relevant controlling parameters is necessary to ensure optimal efficiency.
CASE STUDIES IN THERMAL ENGINEERING
(2021)
Article
Thermodynamics
Yohei Kubo, Sayaka Yamada, Hideki Murakawa, Hitoshi Asano
Summary: Frictional pressure drop and flow patterns of vertically upward boiling flows in semi-circular mini-channels were experimentally investigated using R-245fa as the working fluid. It was found that the gas Weber number increased with increasing mass flux and decreasing hydraulic diameter, and nucleate boiling leading to strong fluctuation of the gas-liquid interface was observed in the 0.55 mm channel.
APPLIED THERMAL ENGINEERING
(2021)
Article
Thermodynamics
Emad A. Sayed, Mohamed Fathy
Summary: An efficient Legendre-Galerkin approach is used to study the flow characteristics and heat transfer of nanofluid along an upward cone under the effects of heat generation and thermal radiation. The results show that using 10% nanoparticle nanofluid instead of 5% nanoparticle nanofluid can improve the surface mechanical characteristics, leading to a 10-40% increase in heat transfer rate, thereby speeding up the cooling process and enhancing the surface's hardness and strength.
CASE STUDIES IN THERMAL ENGINEERING
(2022)
Article
Physics, Applied
Mohammad Khorrami, Amir Aghamohammadi
Summary: In this paper, the problem of velocity distribution in fully developed laminar flows through ducts of arbitrary cross-sections is investigated using a perturbative approach. Nonperturbative exact results are also obtained. The specific conductivity, a dimensionless quantity dependent only on the shape of the duct, is the main focus. Numerical values for specific conductivity are determined for various examples using perturbative or exact methods.
INTERNATIONAL JOURNAL OF MODERN PHYSICS B
(2023)
Article
Engineering, Multidisciplinary
Ayelet Goldstein, Ofer Eyal
Summary: The study proposes a simple method for examining the local behavior of velocity and shear stresses near a triple point in two-phase flow. By focusing on the vicinity of the TP and simplifying calculations, the method can be extended to other areas for application.
APPLIED MATHEMATICAL MODELLING
(2021)
Article
Thermodynamics
Roohollah Hosseini Monfared, Mohammadreza Niknejadi, Davood Toghraie, Pouya Barnoon
Summary: In this research, fluid flow and heat transfer of a water/Al2O3 nanofluid in a tube with helical ribs were investigated. The results indicated that as Reynolds number increases, heat transfer increases, and friction factor decreases, with helical ribs enhancing heat transfer efficiency. Using nanofluid can lead to improved heat transfer and reduced friction factor.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2022)
Article
Thermodynamics
Ritesh Kumar, Badyanath Tiwary, Pawan Kumar Singh
Summary: In this study, the thermofluidic analysis of an Al2O3-water nanofluid-cooled, branched wavy heat sink microchannel was conducted using numerical simulations and compared with experiments on a straight channel heat sink microchannel. The results showed that the branched wavy heat sink microchannel outperformed the straight channel heat sink microchannel in terms of thermal performance enhancement.
APPLIED THERMAL ENGINEERING
(2022)
Article
Engineering, Chemical
P. Soleimani, M. Khoshvaght-Aliabadi, H. Rashidi, H. Bahmanpour
CHINESE JOURNAL OF CHEMICAL ENGINEERING
(2020)
Article
Thermodynamics
S. M. Hassani, M. Khoshvaght-Aliabadi, A. Feizabadi, S. Rehman, A. Alimoradi
Summary: In this study, the effects of shape and arrangement of turbulators on streamlines and contours of airflow were analyzed using experimental and numerical results. The C turbulators in the FV arrangement showed the best performance.
EXPERIMENTAL HEAT TRANSFER
(2022)
Article
Green & Sustainable Science & Technology
Muhyaddin J. H. Rawa, Yusuf A. Al-Turki, Nidal H. Abu-Hamdeh, Morteza Khoshvaght-Aliabadi, Ashkan Alimoradi
Summary: Coil-tubes, including helical, colubrine, and spiral, were compared in terms of their performance in solar ponds, revealing that twisting walls lead to higher heat extraction rates. Among the three types, spiral coil-tubes showed the highest heat extraction values, followed by helical and colubrine. Models with lower coil-pitch and twist-length provided higher heat extraction and pumping power values.
ENVIRONMENTAL PROGRESS & SUSTAINABLE ENERGY
(2021)
Article
Thermodynamics
S. M. Hassani, M. Khoshvaght-Aliabadi, S. H. Mazloumi, Shafiqur Rehman, Ashkan Alimoradi
Summary: The study proposed and investigated a combination design of rectangular pin and chamber to enhance the performance of microchannels, resulting in increased heat transfer coefficient with a penalty in pressure drop. The positions of pins and chambers have significant impacts on the overall performance of the microchannel.
APPLIED THERMAL ENGINEERING
(2021)
Article
Thermodynamics
M. Khoshvaght-Aliabadi, E. Hosseinirad, M. Farsi, F. Hormozi
Summary: Novel patterns of chevron minichannels are introduced in this study to improve thermal performance in microelectronic devices. Through numerical analysis and experimental validation, it is found that curvatures play a crucial role in enhancing heat transfer efficiency. Among the different cases studied, the model with curvature on three sides shows the best thermal resistance performance.
INTERNATIONAL COMMUNICATIONS IN HEAT AND MASS TRANSFER
(2021)
Article
Thermodynamics
Faezeh Nejati Barzoki, Ghanbar Ali Sheikhzadeh, Morteza Khoshvaght Aliabadi, Ali Akbar Abbasian Arani
Summary: The study investigates the thermohydraulic performance of the PCPF with different vortex generators VGs shapes. Results show that the enhanced models of the PCPF with VGs have higher values of j/f ratio and eta, with the half-circle VG showing the highest thermohydraulic performance.
INTERNATIONAL JOURNAL OF NUMERICAL METHODS FOR HEAT & FLUID FLOW
(2021)
Article
Thermodynamics
Mahdi Farsi, Morteza Khoshvaght-Aliabadi, Ashkan Alimoradi
Summary: A parametric study was conducted on circular tubes with alternating flattened flow paths to enhance thermal performance by generating multi-normal vortices. Results showed that new vortices were formed due to increasing Reynolds number and decreasing design factors, with the minimum axis having the greatest impact. Adjusting the design factors increased Nusselt number and friction factor, leading to improved thermal performance in most enhanced models, particularly at high Reynolds numbers. The best thermal performance factor was around 2.27 for a model with specific design factor values. Three correlations were developed to predict hydrothermal parameters with an average error within 5%.
INTERNATIONAL JOURNAL OF THERMAL SCIENCES
(2021)
Article
Energy & Fuels
H. R. Babaei, M. Khoshvaght-Aliabadi, S. H. Mazloumi
Summary: This study analyzes the performance of serpentine coils with alternating flattened axis for heat extraction in solar ponds using experimental testing and numerical simulations. It is found that heat extraction is enhanced with decreasing segment and transition length, and increasing flattened depth. The best models are introduced based on an overall performance index, which increases with mass flow rate.
Article
Energy & Fuels
Morteza Khoshvaght-Aliabadi, Parinaz Soleimani, Shafiqur Rehman, Ashkan Alimoradi
Summary: Three enhanced geometries (TI, TT, and CT) are proposed to enhance thermal performance and reduce fuel consumption in a pressure drop station. Results show that using enhanced models can significantly increase NG temperature, but also increase pressure drop. Enhanced models can effectively reduce the length of the pipeline.
JOURNAL OF NATURAL GAS SCIENCE AND ENGINEERING
(2021)
Article
Nuclear Science & Technology
M. Farnam, M. Khoshvaght-Aliabadi, M. J. Asadollahzadeh
Summary: The study proposes a twisting structure to enhance the thermal performance of a coil heat exchanger equipped with a helical tube. Experiments and simulations show improvements in Nusselt number and friction factor, with parametrization analysis revealing that the helical-diameter has the most significant impact on the thermal-hydraulic characteristics of the helical-twisted tube. Decreasing the helical-diameter and twist-pitch leads to an overall improvement in hydrothermal performance.
ANNALS OF NUCLEAR ENERGY
(2021)
Article
Thermodynamics
M. Khoshvaght-Aliabadi, N. Naeimabadi, F. Nejati Barzoki, A. Salimi
Summary: The study investigates the application of novel delta-winglet tapes in a heated channel, analyzes the impact of different arrangements on thermal performance through experiments and numerical simulations, and finds that non-uniform arrangements of delta-winglets affect the channel's performance, sometimes leading to better thermal performance than uniform arrangements.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2021)
Article
Thermodynamics
M. Khoshvaght-Aliabadi, A. Feizabadi, M. Nouri
Summary: Novel minichannels with wavy structures are designed to enhance the thermal performance and temperature uniformity of heat sinks. Experimental results show a significant decrease in temperature difference and total thermal resistance, indicating the positive impact of these new designs. Additionally, despite a conflict between reducing total thermal resistance and lowering pumping power, the novel minichannels show superior performance index values, especially at higher Reynolds numbers.
APPLIED THERMAL ENGINEERING
(2021)
Article
Energy & Fuels
Morteza Khoshvaght-Aliabadi, Mohammad Sahamiyan
Summary: An experimental study compared the performance of novel twisted-tapes, finding that the use of deltawinglets enhances heat transfer, reduces pressure drop, and improves overall thermal performance of the tube under identical operating conditions.
CHEMICAL ENGINEERING AND PROCESSING-PROCESS INTENSIFICATION
(2021)
Article
Thermodynamics
Elham Hosseinirad, Morteza Khoshvaght-Aliabadi
Summary: This study investigated the impact of combining different geometries of straight and wavy fins on the performance of MHS, showing that the wavy structure enhances thermal performance, and interruptions are more effective on straight fins.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2021)
Article
Thermodynamics
Morteza Khoshvaght-Aliabadi, M. Farsi, S. M. Hassani, Nidal H. Abu-Hamdeh, Ashkan Alimoradi
Summary: Twisted-turbulators are effective passive techniques for improving the thermal performance of heat exchangers, especially when considering varying twist angles and the effects of perforations and winglets. Experimental tests and numerical simulations show that different modifications have different effects on the performance of the transversely twisted-turbulators (TTTs), with solid models being more effective in fluid dispersion in certain cases. Overall, the addition of winglets improves the performance of TTTs with twist angles of 90 degrees and 180 degrees, while for 0 degrees TTTs, a combination of perforations and winglets leads to lower values of heat transfer coefficient and pressure drop.
INTERNATIONAL COMMUNICATIONS IN HEAT AND MASS TRANSFER
(2021)
Article
Engineering, Chemical
Xu Yang, Jieshi Xiao, Jian Huang, Kaixiang Peng
Summary: This study introduces an online convolutional adversarial autoencoder (AAE) model to learn representative industrial process information. By extracting features that reflect diverse information and follow a Gaussian distribution, the model improves the accuracy of fault detection and removes redundant information through a feature selection strategy.
JOURNAL OF THE TAIWAN INSTITUTE OF CHEMICAL ENGINEERS
(2024)
Article
Engineering, Chemical
Shao-Yang Wu, Meng-Tsun Lai, Chung-Hui Hsu, Kevin C. W. Wu, Yesong Gu
Summary: This study investigated the effectiveness of using Fe-based MOF or MIL-100(Fe) in conjunction with a PEDOT-modified Pt electrode for detecting the synthetic azo dye tartrazine. By modifying the electrode with two different methods, favorable lower reductive potentials, competitive sensitivities, and good repeatability and stability were achieved in all MIL-100(Fe)/PEDOT/Pt electrodes.
JOURNAL OF THE TAIWAN INSTITUTE OF CHEMICAL ENGINEERS
(2024)
