Article
Thermodynamics
Nima Shirani, Davood Toghraie, Majid Zarringhalam, Masoud Afrand
Summary: The study reveals that heat transfer is influenced by the angular velocity of the cylinder, type of rotation, and nanoparticle concentration. Adding nanoparticles enhances heat transfer rate, but the effect of nanofluids on geometry has reduced for PEC.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2021)
Article
Chemistry, Multidisciplinary
M. M. Rashidi, M. Sadri, M. A. Sheremet
Summary: This study simulated the energy transference of a hybrid nanosuspension under the influence of a magnetic field, showing that the solid volume fraction of nanoparticles in the hybrid nanofluid has a significant impact on heat transfer efficiency. Proper selection of flow parameters like Richardson number and Hartmann number can enhance the heat transmission rate.
Article
Engineering, Multidisciplinary
Haiying Zhang, Xiujun Nie, Dmitry Olegovich Bokov, Davood Toghraie, Omid Ali Akbari, Farnaz Montazerifar, Farzad Pourfattah, Yousof Esmaeili, Roohollah Khodaparast
Summary: In this study, laminar mixed convection of water/Ag nanofluid with different volume fractions of nanoparticles was simulated. The results show that adding a higher volume fraction of nanoparticles at lower Richardson numbers enhances heat transfer and Nusselt number. The streamlines in the cavity are influenced by lid-driven motion and fluid viscosity, which contribute to achieving uniform temperature distribution in the cavity.
ALEXANDRIA ENGINEERING JOURNAL
(2022)
Article
Engineering, Multidisciplinary
Simon Xia, Mohammad Mostafavi, Tawfeeq Alghazali, Sajad Sadi, John William Grimaldo Guerrero, Wanich Suksatan, Davood Toghraie, Afrasyab Khan
Summary: This study numerically investigates the mixed convection of Al2O3-Water nanofluid in a T-shaped lid-driven cavity with a thermal barrier at different positions. The results show that the heat transfer performance varies with parameters such as volume fraction of nanoparticles and cavity aspect ratio. Additionally, the geometric position of the thermal barrier is found to have a significant impact on the heat transfer.
ALEXANDRIA ENGINEERING JOURNAL
(2022)
Article
Multidisciplinary Sciences
Nima Shirani, Davood Toghraie
Summary: The study investigates mixed convection of nanofluid in a 2D square enclosure with a porous block and four rotating cylinders forced by a simple harmonic function. Results show that decreasing Darcy number and Richardson number increases average Nusselt number, while changes in porosity do not decisively affect heat transfer. Maximizing volume fraction of copper nanoparticles enhances heat transfer. Additionally, high permeability of the porous medium intensifies the impact of harmonic rotation of the cylinders on flow patterns.
SCIENTIFIC REPORTS
(2021)
Article
Mechanics
Aneela Bibi, Hang Xu
Summary: This article investigates fluid dynamics and heat transfer properties in a trapezoidal enclosure containing a heated cylindrical object. It explores the interaction of multiple physical processes and analyzes the governing equations numerically. The findings demonstrate the various factors influencing the thermal and mass transfer in the enclosure, and the effectiveness of the multiple expression programming (MEP) technique in predicting heat transfer behavior.
Article
Thermodynamics
Ammar Alsabery, Mohammad Vaezi, Tahar Tayebi, Ishak Hashim, Mohammad Ghalambaz, Ali J. Chamkha
Summary: This study investigates mixed convection of nanofluid within a wavy lid-driven enclosure with a prominent heat source. A two-phase method is used for the nanoliquid, resulting in a non-homogeneous concentration field. The governing equations are solved using the finite element technique. The study examines the effects of adding nanoparticles, wave number and amplitude of the wavy walls, and the aspect ratio of the heat source on heat transfer rate.
CASE STUDIES IN THERMAL ENGINEERING
(2022)
Article
Mathematics
Daria S. Loenko, Mikhail A. Sheremet
Summary: This work investigates the power-law nanofluid natural convection in a chamber with a thermally generating unit and a solid ribbed structure. The effectiveness of the nanoliquid is determined by experimental correlations reflecting temperature effects. The results show that the volume fraction of nanoparticles and the height of the ribbed structure have an impact on the temperature distribution, and increasing the volume fraction of nanoparticles and the number of fins can reduce the temperature.
Article
Physics, Multidisciplinary
Veena Chandanam, C. Venkata Lakshmi, K. Venkatadri, O. Anwar Beg, V. Ramachandra Prasad
Summary: A numerical study of laminar viscous magnetohydrodynamic natural convection flow in a triangular-shaped porous enclosure is presented in this paper. The impact of physical parameters on streamlines and temperature contours is discussed for an extensive range of Rayleigh number, Hartmann magnetohydrodynamic number, and Darcy parameter. The simulations reveal interesting features of thermofluid behavior, which are relevant to magnetic materials processing and hybrid magnetic fuel cells.
EUROPEAN PHYSICAL JOURNAL PLUS
(2021)
Article
Multidisciplinary Sciences
Muhamad S. Ishak, Ammar I. Alsabery, Ishak Hashim, Ali J. Chamkha
Summary: This study numerically examined entropy production and mixed convection within a trapezoidal nanofluid-filled cavity with a localized solid cylinder. The results showed that the size and location of the solid cylinder are significant control parameters for optimizing heat transfer, with the highest average Nusselt numbers obtained for high R values.
SCIENTIFIC REPORTS
(2021)
Article
Thermodynamics
J. Tibaut, T. Tibaut, J. Ravnik
Summary: This paper presents a numerical study of laminar mixed convection of a nanofluid in a pipe and compares the results with experimental measurements. The research found that the distribution of nanoparticle concentration has a significant impact on the temperature field in both the fluid and the pipe.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2021)
Article
Thermodynamics
Xinying Zhang, Ying Xu, Jian Zhang, Amin Rahmani, S. Mohammad Sajadi, Majid Zarringhalam, Davood Toghraie
Summary: The present study numerically modeled the mixed convection of nanofluids inside an inclined cavity and found that changing the Richardson number can adjust temperature distribution and heat transfer, which is significant for the design of cooling systems for electronic components, solar energy storage, and heat exchangers.
INTERNATIONAL COMMUNICATIONS IN HEAT AND MASS TRANSFER
(2021)
Article
Multidisciplinary Sciences
Ammar I. Alsabery, Tahar Tayebi, Hakim T. Kadhim, Mohammad Ghalambaz, Ishak Hashim, Ali J. Chamkha
Summary: The study investigates the influence of a two-phase hybrid nanofluid approach on mixed convection characteristics, considering factors such as nanoparticle migration and the presence of solid obstacles. The analysis of non-dimensional parameters using the finite element technique reveals that temperature gradient can lead to significant concentration variations within the enclosure.
JOURNAL OF ADVANCED RESEARCH
(2021)
Article
Thermodynamics
Sanda Micula, Teodor Grosan, Ioan Pop
Summary: This paper continues the study of using spline functions for problems involving heat and fluid flow in porous media. The numerical solution of free convection in a square cavity filled with a fluid-saturated porous medium is investigated using a spline collocation method. The results show that the method has advantages such as faster convergence, ease of use, improved numerical accuracy, and reduced implementation cost.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2022)
Article
Thermodynamics
Soufiane Nouari, Elhafad Bara, Zakaria Lafdaili, Sakina EL-Hamdani, Abdelaziz Bendou, Hicham Doghmi
Summary: In this study, the impact of oscillatory movement on heat transfer within a double periodic lid-driven cubic enclosure filled with copper-water nanofluid was investigated. It was found that decreasing the Richardson number with low lids frequency can greatly enhance heat transfer. Swapping from Case 2 to Case 1 leads to a 29.74% increase in the maximum average Nusselt number. At a high Richardson number, using high lids frequency increases heat transfer rate compared to using low lids frequency (an enhancement of 4.32% for Case 1 and 3.63% for Case 2). The best heat transfer rate was achieved for Case 1 when the lids move positively, transporting the cold flow to the hot side. Increasing the concentration of nanoparticles improves heat transfer. This study contributes to understanding the problem of mixed convection in a cubic enclosure with oscillatory walls.
INTERNATIONAL JOURNAL OF NUMERICAL METHODS FOR HEAT & FLUID FLOW
(2022)
Article
Energy & Fuels
Amir Houshang Mahmoudi, Miladin Markovic, Bernhard Peters, Gerrit Brem
Article
Thermodynamics
Amir Houshang Mahmoudi, Florian Hoffmann, Bernhard Peters
APPLIED THERMAL ENGINEERING
(2016)
Article
Engineering, Chemical
Amir Houshang Mahmoudi, Xavier Besseron, Florian Hoffmann, Miladin Markovic, Bernhard Peters
CHEMICAL ENGINEERING SCIENCE
(2016)
Article
Thermodynamics
Amir Houshang Mahmoudi, Florian Hoffmann, Miladin Markovic, Bernhard Peters, Gerrit Brem
COMBUSTION AND FLAME
(2016)
Article
Thermodynamics
Amir Houshang Mahmoudi, Florian Hoffmann, Bernhard Peters, Xavier Besseron
INTERNATIONAL COMMUNICATIONS IN HEAT AND MASS TRANSFER
(2016)
Article
Engineering, Chemical
Amir Houshang Mahmoudi, A. K. Pozarlik, E. van der Weide, S. R. A. Kersten, S. Luding, G. Brem
CHEMICAL ENGINEERING SCIENCE
(2018)
Article
Engineering, Mechanical
R. Yadollahi Farsani, A. Raisi, Amirhoushang Mahmoudi
JOURNAL OF THE BRAZILIAN SOCIETY OF MECHANICAL SCIENCES AND ENGINEERING
(2019)
Article
Energy & Fuels
Jeroen Mol, Mina Shahi, Amirhoushang Mahmoudi
Article
Engineering, Environmental
Mohammad Mehrali, Johan E. ten Elshof, Mina Shahi, Amirhoushang Mahmoudi
Summary: Solar radiation's intermittent nature offers a vast opportunity for phase change materials (PCMs) in solar driven applications. Incorporation of graphene nanoplatelets in PCMs can enhance energy storage capacity and fast charging and discharging rates, while reducing leakage and improving thermal conductivity.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Engineering, Chemical
Amirhoushang Mahmoudi, Pim A. J. Donkers, Khuram Walayat, Bernhard Peters, Mina Shahi
Summary: Salt hydrates are potential candidates for long-term thermochemical heat storage in the building environment, involving key technologies such as heat and mass transfer. Deep investigation of (de)hydration processes is essential for improving storage system performance.
CHEMICAL ENGINEERING SCIENCE
(2021)
Article
Thermodynamics
Chung-Yu Yeh, K. J. F. Boonk, Gholamabbas Sadeghi, Mohammad Mehrali, Mina Shahi, Gerrit Brem, Amirhoushang Mahmoudi
Summary: This study explores a compact design of storage-integrated solar thermal collector and investigates the use of a shape stabilized phase change material (PCM) to improve the energy efficiency of a typical solar domestic water heating system. Experimental testing and numerical modeling were conducted to analyze the thermal properties of the developed PCM. The results show that optimizing the collector design can significantly extend the discharging period and improve the charging rate.
CASE STUDIES IN THERMAL ENGINEERING
(2022)
Article
Mathematics, Interdisciplinary Applications
Algis Dziugys, Amir Houshang Mahmoudi, Edgaras Misiulis, Robertas Navakas, Gediminas Skarbalius
Summary: This study used the discrete element method (DEM) to simulate the behavior of particles in packed beds and determined the relationship between the diameter of the smallest particle and the porosity of the bed. The results showed that the bed porosity decreases with decreasing the size of the smallest particle, and the relation between the core porosity of the bed and the smallest particle size in the bed can be described by a fractal law.
CHAOS SOLITONS & FRACTALS
(2022)
Article
Energy & Fuels
Gholamabbas Sadeghi, Mohammad Mehrali, Mina Shahi, Gerrit Brem, Amirhoushang Mahmoudi
Summary: Investigations into the design of compact PCM-solar systems have shown that integrated flat plate storage systems are predominantly used for space heating, while concentrating solar collectors are primarily utilized in industrial applications, employing different phase change materials to provide varying temperature levels.
Article
Thermodynamics
Gholamabbas Sadeghi, Mohammad Mehrali, Mina Shahi, Gerrit Brem, Amirhoushang Mahmoudi
Summary: This study addresses the issue of storage tank requirement in solar water heaters by experimentally applying a shape-stabilized phase change material (PCM) to a tankless solar collector. The research found that the thermal efficiency of the collector-storage system was significantly improved, showing potential for energy storage. Changing the flow rate had a limited impact on heat gain, but high flow rates reduced the discharge efficiency. Furthermore, the proposed system showed promising results in terms of cost savings and reduction in CO2 emissions.
ENERGY CONVERSION AND MANAGEMENT
(2022)
Article
Thermodynamics
Rouhollah Yadollahi Farsani, Amirhoushang Mahmoudi, Mehdi Jahangiri
THERMAL SCIENCE AND ENGINEERING PROGRESS
(2020)
