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
Thermodynamics
Muhammad Jawad, Maria Kirn Hameed, Aaqib Majeed, Kottakkaran Sooppy Nisar
Summary: Efficient thermal conveyance is necessary for the growth of high-density heat devices, and the concept of nanofluid plays a vital role in meeting these needs. A mathematical model is presented for evaluating the behavior of electrical conducting Maxwell nanofluid with heat and mass transfer over a porous stretched sheet in the presence of bioconvection. The effects of various parameters on flow and heat transfer characteristics are discussed, and the outcomes can be valuable for enhancing the productivity of heat transfer devices.
CASE STUDIES IN THERMAL ENGINEERING
(2023)
Article
Thermodynamics
Aqsa Yousaf, Muhammad Imran, Sumeira Yasmin, Mohamed R. Ali
Summary: This study focuses on the investigation of bio-convection flow in MHD Prandlt nanofluid with gyrotactic motile microorganism. The governing flow equations are transformed from non-linear coupled PDEs to non-linear ODEs using similarity transformations and solved using Matlab software. The results show that magnetic field enhances heat transfer while decreasing fluid velocity. Concentration and density performance are improved by thermophoretic and Brownian motion effects. Furthermore, the number of microorganisms decreases with increasing Peclet number and bioconvection Lewis number.
CASE STUDIES IN THERMAL ENGINEERING
(2023)
Article
Mathematics
Muhammad Faizan, Farhan Ali, Karuppusamy Loganathan, Aurang Zaib, Ch Achi Reddy, Sara I. Abdelsalam
Summary: This article presents an exhibition of a Riga plate with an electric magnetization actuator, consisting of permanent magnets and electrodes, that produces electromagnetic hydrodynamic phenomena over a fluid flow. It addresses the entropy analysis of Sutterby nanofluid flow and examines the behavior of heat and mass relaxation time using the Cattaneo-Christov heat and mass flux. The effect of various variables on velocity, temperature, concentration, and microorganism distributions is elaborated, and the validation of the model is achieved through previous literature.
Article
Thermodynamics
D. Srinivasacharya, K. Sita Ramana
Summary: This article analyzes the influence of thermal radiation on double-diffusive natural convection of a nanofluid past an inclined wavy surface in the presence of gymtactic microorganisms. A coordinate transformation and pseudo-similarity variables were used to non-dimensionalize the governing non-linear differential equations, which were then linearized and solved using the bivariate Chebyshev pseudo-spectral collocation method. The effects of physical and geometrical parameters on flow quantities were illustrated and analyzed through graphs.
THERMAL SCIENCE AND ENGINEERING PROGRESS
(2021)
Article
Physics, Multidisciplinary
Anas A. M. Arafa, Z. Z. Rashed, Sameh E. Ahmed
Summary: This paper applies the Atangana-Baleanu Caputo (ABC) sense to the unsteady MHD bioconvection nanofluid boundary layer flow due to gyrotactic microorganisms, focusing on convective boundary conditions, thermal radiation, and the Buongiorno nanofluid model. The results show that in the passive control case, velocity and temperature values are higher than in the active control case, and there is an enhancement in local Nusselt number when the order of fractional derivatives is varied.
Article
Physics, Applied
Bodduna Jamuna, M. P. Mallesh, Chandra Shekar Balla, Sabir Ali Shehzad
Summary: This research investigates the influences of entropy generation on bioconvected nanoliquid flow through a porous cavity filled with nanofluid and gyrotactic microbes. The study focuses on the augmentation of convection by Brownian motion, thermophoresis, and bioconvection, and utilizes finite difference method to solve the nonlinear partial differential equations. Results show that the distribution pattern of total entropies and Bejan number is affected by various quantities such as bioconvection Rayleigh number, Rayleigh number, Peclet number, and buoyancy ratio.
INTERNATIONAL JOURNAL OF MODERN PHYSICS B
(2023)
Article
Mathematics, Applied
Latifa Ishaq Khayyat, Abdullah Ahmad Abdullah
Summary: Marangoni bio-thermal convection in a layer of nanofluid with gyrotactic microorganisms is investigated numerically. The effects of thermophoresis and Brownian diffusion on the motion of nanoparticles and the physical properties of the nanofluids are considered. Stability boundaries are obtained for two types of nanofluids, and the critical eigenvalues indicate an onset of instability through an oscillatory mode.
ZAMM-ZEITSCHRIFT FUR ANGEWANDTE MATHEMATIK UND MECHANIK
(2022)
Article
Mathematics, Interdisciplinary Applications
Ying-Qing Song, Aamir Hamid, M. Ijaz Khan, R. J. Punith Gowda, R. Naveen Kumar, B. C. Prasannakumara, Sami Ullah Khan, M. Imran Khan, M. Y. Malik
Summary: The study focuses on nanofluid flow over a vertical thin needle with gyrotactic microorganisms, considering the presence of a magnetic field in the incompressible electrically conductive liquid. The model includes the effects of thermophoresis and Brownian motion. The results show that increasing magnetic and buoyancy ratio parameters lead to a reduction in velocity gradient, while higher Biot number and radiation parameter enhance heat transfer. The density of motile microorganisms increases with Lewis number and decreases with Peclet number.
CHAOS SOLITONS & FRACTALS
(2021)
Article
Multidisciplinary Sciences
Arshad Khan, Anwar Saeed, Asifa Tassaddiq, Taza Gul, Poom Kumam, Ishtiaq Ali, Wiyada Kumam
Summary: This study investigates the thermal behavior of bio-convective hybrid nanofluid flowing on a moving needle, considering the effects of chemical reactions, viscous dissipation, and microorganisms. The results show that as the bioconvection Rayleigh number, buoyancy ratio, and volume fraction of nanoparticles increase, fluid flow decreases while thermal flow increases. The comparison with existing literature shows agreement on variations in needle thickness.
SCIENTIFIC REPORTS
(2021)
Article
Energy & Fuels
M. Elayarani, M. Shanmugapriya, Senthil P. Kumar
Summary: The study focuses on the impact of process intensification on complex fluids in mixing processes, presenting ANFIS models for bio-convection flow of Carreau nanofluid. The results show that the ANFIS models can efficiently and accurately predict the influence of various parameters during the flow process.
CHEMICAL ENGINEERING AND PROCESSING-PROCESS INTENSIFICATION
(2021)
Article
Thermodynamics
Naseer M. Khan, Awatef Abidi, Ilyas Khan, Fakhirah Alotaibi, Abdulaziz H. Alghtani, M. A. Aljohani, Ahmed M. Galal
Summary: This study focuses on the two-dimensional flow of Eyring-Powell's nanofluid containing gyrotactic microorganisms on a porous plate exposed to thermal radiation and surface suction. The impact of various physical parameters on velocity, temperature, and concentration distribution is analyzed, revealing that suction reduces temperature but increases heat transfer rate, while a magnetic field can enhance microbial concentration.
CASE STUDIES IN THERMAL ENGINEERING
(2021)
Article
Thermodynamics
D. Srinivasacharya, K. Sita Ramana
Summary: This study investigates the mixed convection of a nanofluid flowing past an inclined wavy surface in the presence of gyrotactic microbes. By converting the wavy surface to a plane surface through a coordinate transformation and using pseudo-similarity variables, the governing equations and boundary conditions are transformed into dimensionless form and linearized through local linearization. The analysis shows that skin friction, microorganism density, and nanoparticle mass transfer rate increase with bioconvection Peclet and Schmidt numbers, while decreasing with Rayleigh number. Additionally, the local Nusselt number, nanoparticle Sherwood number, and microbe density number increase with Brownian motion and thermophoresis parameters, and these physical quantities increase when the surface changes from horizontal to vertical.
Article
Multidisciplinary Sciences
M. Venkata Subba Rao, K. Gangadhar, Ali J. Chamkha, P. Surekha
Summary: A mathematical model is developed to study Darcy free convection in a nanofluid-saturated porous medium with reference to an isothermal vertical cone pointing downward. The model considers gyrotactic microorganisms, nanoparticles, chemical reactions, and convective boundary conditions. The study shows that bioconvection parameters generally increase microorganisms and nanoparticles concentration, while dimensionless motile microorganisms decrease with strong chemical reactions.
ARABIAN JOURNAL FOR SCIENCE AND ENGINEERING
(2021)
Article
Thermodynamics
M. Ijaz, S. Nadeem, M. Ayub, S. Mansoor
Summary: This study investigates the thermal radiation features on ferromagnetic Jeffrey fluid flow within the context of gyrotactic microorganisms and magnetic dipole. The numerical results suggest that the temperature profile is enhanced by the radiation and ferrohydrodynamic interaction parameters. Space- and temperature-dependent heat absorption is found to be more suitable for cooling purposes.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2021)
Article
Engineering, Multidisciplinary
M. A. Mansour, Rama Subba Reddy Gorla, Sadia Siddiqa, A. M. Rashad, T. Salah
Summary: This article presents a numerical investigation of the unsteady magnetohydrodynamics (MHD) natural convection flow in an inclined square cavity filled with nanofluid. The impact of a heated circular obstacle with heat generation/absorption is examined. The study shows that MHD has a dominant effect on the streamlines, isotherms, and average Nusselt number compared to other physical parameters.
INTERNATIONAL JOURNAL OF NONLINEAR SCIENCES AND NUMERICAL SIMULATION
(2023)
Article
Engineering, Environmental
Muhammad Fawad Khan, Muhammad Sulaiman, Fahad Sameer Alshammari
Summary: This paper investigates Savanna fire and proposes a model for numerical evaluation. By describing the relationship between environment and climate, it explains the stability of Savanna vegetation. The proposed model is validated through comparisons with different algorithms and performance indicators.
STOCHASTIC ENVIRONMENTAL RESEARCH AND RISK ASSESSMENT
(2023)
Article
Mathematics, Applied
Amjid Rashid, Abdullah Dawar, Muhammad Ayaz, Saeed Islam, Ahmed M. Galal, Humaira Gul
Summary: This study investigates the flow characteristics of a water-based hybrid nanofluid consisting of silver and alumina nanoparticles past a spinning disk. The effects of Brownian motion, activation energy, magnetic field, and thermophoresis are taken into account. The partial differential equations (PDEs) are transformed into ordinary differential equations (ODEs) through suitable correspondence transformations. The modeled equations are solved using a semi-analytical method known as HAM. Graphical representations of the nanofluid and hybrid nanofluid profiles are used. The findings show a decrease in the radial and tangential velocities of the nanofluids and hybrid nanofluid with an increase in the magnetic factor. The hybrid nanofluid exhibits higher growth and better thermal conductivity than the nanofluids due to the magnetic factor.
ZAMM-ZEITSCHRIFT FUR ANGEWANDTE MATHEMATIK UND MECHANIK
(2023)
Article
Mathematics, Applied
Ajed Akbar, Hakeem Ullah, Kottakkaran Sooppy Nisar, Muhammad Asif Zahoor Raja, Muhammad Shoaib, Saeed Islam
Summary: This study examines the Buongiorno model for the MHD nano-fluid flow through a rotating disk under the influence of partial slip effects using the LMB-NNS technique. The recommended approach demonstrates high accuracy and has various applications.
ZAMM-ZEITSCHRIFT FUR ANGEWANDTE MATHEMATIK UND MECHANIK
(2023)
Article
Engineering, Mechanical
Sadia Siddiqa, Sahrish Batool Naqvi, Muhammad Azam, Md. Mamun Molla
Summary: This study investigates the wind flow around buildings with different rooftops using large-eddy simulation (LES) numerically. The LES method is used to compute the large eddies and the dynamic Smagorinsky subgrid-scale (SGS) model calculates the small eddies. Artificial turbulent fields are generated at the inlet using the turbulent spot method. The study aims to analyze the wakes' vortical structure of buildings with different heights and shapes. Precise predictions of airflow around buildings are important for various engineering applications to ensure performance and safety. The numerical solver is validated by comparing it with earlier reported numerical and experimental data. The turbulent flow characteristics are discussed in terms of instantaneous flow structure and time-averaged statistical flow quantities. The simulated cases have a Reynolds number Re = 12,000 to understand the turbulent airflow patterns. The flow exhibits a separable bubble at the leading edge of the building's rooftop, resulting in recirculation at the lee side of the first row of buildings. Suction occurs near the leading edge of the building due to this recirculation, ensuring a continuous flow of air around the obstacles. Additionally, Reynolds stresses show high momentum fluxes in the frontal region of the buildings.
PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART C-JOURNAL OF MECHANICAL ENGINEERING SCIENCE
(2023)
Article
Thermodynamics
Amjid Rashid, Muhammad Ayaz, Saeed Islam
Summary: The physical aspects of the alumina and silver nanoparticles on the magnetohydrodynamic (MHD) flow of mixed convection micropolar hybrid nanofluid with EG-H2O base fluid via stretching surface embedded in a porous medium are investigated and analyzed. The influence of suction on the flow behavior is discussed, along with the analysis of heat transport phenomena. Nonlinear partial differential equations are transformed into nonlinear ordinary differential equations and solved using the NDSolve technique. The influence of different flow parameters on velocity, microrotation, and temperature profiles of the hybrid nanofluid is depicted graphically, and the skin friction coefficients for nanofluid and hybrid nanofluid are calculated and presented in tabular form. Results show that the velocity of the hybrid nanofluid is higher with increasing stretching ratio parameter, and the suction parameter enhances the microrotation profile of the hybrid nanofluid. Furthermore, the velocity, microrotation, and temperature of the hybrid nanofluid are found to be higher compared to the alumina nanofluid and silver-nanofluid.
ADVANCES IN MECHANICAL ENGINEERING
(2023)
Article
Thermodynamics
Amjid Rashid, Muhammad Ayaz, Saeed Islam
Summary: This study investigates the influence of nanoparticle suspension on the fluid characteristics, specifically the heat transfer mechanism in nanofluids. The effects of mixed convection MHD and Joule heating on the flow of hybrid nanofluid and pure nanofluid in porous media are examined under radiation. The findings show that the heat transmission rate increases with an increase in mixed convection parameter, while it decreases with an increase in radiation and magnetic parameters.
ADVANCES IN MECHANICAL ENGINEERING
(2023)
Article
Thermodynamics
Ishtiaq Khan, Amin Ur Rahman, Abdullah Dawar, Saeed Islam, Aiman Zaman
Summary: The nanoliquid concept has diverse applications in various fields such as biomedicine, heat exchangers, cooling systems, food industry, and transportation. Adding solid nanoparticles, including silica, copper, silver, alumina, graphene, and gold, to base fluids like engine oil, kerosene oil, water, and sodium alginate improves the thermal efficiency. This research investigates the second-order slip flow of a Cu-Fe3O4/H2O past a bi-directional stretching surface, considering thermal convection, zero mass flux, and velocity slips. The findings demonstrate the influence of different factors on the flow distribution, including the magnetic constraint, ratio parameter, and thermal Biot number.
ADVANCES IN MECHANICAL ENGINEERING
(2023)
Article
Engineering, Multidisciplinary
Hakeem Ullah, Kashif Ullah, Muhammad Asif Zahoor Raja, Muhammad Shoaib, Kottakkaran Sooppy Nisar, Saeed Islam, Wajaree Weera, Nuha Al-Harbi
Summary: This study investigates the unsteady-two-dimensional squeezing flow of magnetohydrodynamic Jeffrey fluid between two parallel plates and explores the heat transfer characteristics using the Cattaneo-Christov heat flux model and Artificial Neural Network.
ALEXANDRIA ENGINEERING JOURNAL
(2023)
Article
Thermodynamics
Iftikhar Ahmad, Aziz Khan, Kamal Shah, Thabet Abdeljawad, Saeed Islam
Summary: The aim of this paper is to find analytical solutions for the steady/unsteady 2-D flows of a Newtonian fluid passing through a porous media. The general solutions to the non-linear equations of boundary-layer flows are determined using the extended approach of variable separation and the stream function. The obtained general analytic solutions are then used to investigate specific flow problems based on given initial and boundary conditions.
Article
Computer Science, Information Systems
Muhammad Fawad Khan, Muhammad Sulaiman, Addisu Negash Ali, Ghaylen Laouini, Fahad Sameer Alshammari, Majdi Khalid
Summary: This article analyzes the ocean energy generator system and explains its working principle and optimization methods.
Retraction
Physics, Multidisciplinary
Saeed Islam
JOURNAL OF PHYSICS COMMUNICATIONS
(2023)
Article
Mathematics, Applied
Muhammad Asif Zahoor Raja, Kottakkaran Sooppy Nisar, Muhamma Shoaib, Ajed Akbar, Hakeem Ullah, Saeed Islam
Summary: The present study aims to design a Levenberg-Marquardt backpropagation neural network (LMB-NN) integrated numerical computing to investigate the problem of fluid mechanics governing the flow of magnetohydrodynamics micro-polar nanofluid flow over a rotating disk (MHD-MNRD) model along with the partial slip condition. The basic system model MHD-MNRD is transformed into a system of non-linear ODEs by applying the similarity of transformations. The efficiency of the designed LMB-NN methodology is highlighted by comparative study and performance analysis based on error histograms, MSE analysis, regression and correlation.
Article
Engineering, Multidisciplinary
Bao Rong Chang, Hsiu-Fen Tsai, Han -Lin Chou
Summary: This study introduces a deep learning approach to speed up the code transformation process by modifying simhash with a VSH algorithm and replacing LCS with a PLCS algorithm. It also compares the performance of GPT-2, Microsoft MASS, and Facebook BART. Additionally, it utilizes LIME for explainable AI. Experimental results show that VSH reduces qualified programs by 22.11% and PLCS reduces execution time by 32.39%, resulting in an average 1.38 times speedup compared to previous work.
CMES-COMPUTER MODELING IN ENGINEERING & SCIENCES
(2023)
Article
Computer Science, Information Systems
Muhammad Sulaiman, Awais Khan, Addisu Negash Ali, Ghaylen Laouini, Fahad Sameer Alshammari
Summary: This study provides a comprehensive analysis of the mathematical model governing the hazard of worm propagation in computer networks. An enhanced SEIQP model is proposed, which effectively captures the dissemination dynamics of insider threats. The efficacy of the approach is evaluated using neural networks as surrogate tools, and the stability of the mathematical model is examined.
Article
Thermodynamics
Yunxia Ma, Fei Liu, Honggang Pan, Hongjian Zhang, Shuxia Yan, Ailing Zhang
Summary: This paper proposes a dynamically tunable and switchable perfect infrared absorber that exhibits excellent electrical regulation performance and high absorptance. The absorption mechanism is explained using a multiple interference model, and it is proven to be polarization insensitive.
INTERNATIONAL JOURNAL OF THERMAL SCIENCES
(2024)
Article
Thermodynamics
F. J. dos Santos, G. S. M. Martins, M. Strobel, L. Beckedorff, K. V. de Paiva, J. L. G. Oliveira
Summary: This study investigates the effects of inlet conditions and plate's features on the thermal-flow performance of a gasket plate heat exchanger (GPHE) and assesses the impact of a modified tightening distance on its performance. No systematic study on the combined effects of inlet conditions and assembly accuracy on GPHE performance has been conducted before.
INTERNATIONAL JOURNAL OF THERMAL SCIENCES
(2024)
Article
Thermodynamics
Alok K. Ray, Dibakar Rakshit, K. Ravi Kumar, Hal Gurgenci
Summary: The low thermal conductivity of phase change materials limits the heat transfer rate and application of latent heat storage systems. This numerical study examines the impact of two passive heat transfer enhancement techniques on the thermal performance of a latent heat storage system. The results show that the orientation and position of the heat transfer fluid tube have significant effects on the charging duration, while the discharging duration remains unchanged. The combined effect of orientation and eccentricity reduces the charging duration, but increases the discharging duration compared to the concentric domain.
INTERNATIONAL JOURNAL OF THERMAL SCIENCES
(2024)
Article
Thermodynamics
Yalu Han, Yanlong Wang, Chenyang Liu, Xinmin Hu, Yin An, Zhengcai Li, Jiaxun Jiang, Lizhi Du
Summary: This paper investigates the calculation method of thermal conductivity in NAPLs-contaminated soils. By establishing NAPLs-contaminated soil models and using the Lattice Boltzmann Method (LBM) for calculation, an optimized three-dimensional model with high computational accuracy and efficiency is obtained. The study also finds that saturation and Nz parameters have a significant impact on calculation time, while the thermal conductivity of the two-dimensional model is more sensitive to anisotropy. The influence of porosity and NAPLs content on thermal conductivity should be considered during in-situ thermal desorption.
INTERNATIONAL JOURNAL OF THERMAL SCIENCES
(2024)
Article
Thermodynamics
Mostafa Taha, Song Zhao, Aymeric Lamorlette, Jean-Louis Consalvi, Pierre Boivin
Summary: For the first time, large-eddy simulations (LES) of the near-field region of large-scale fire plumes were performed using a pressure-based Lattice Boltzmann method (LBM) with low-Mach number approximation. The simulations showed quantitative agreement with experimental data and were consistent with previously-published numerical studies. The study demonstrated the computational efficiency of the proposed LBM solver in tackling fire-induced flows, suggesting LBMs as a good alternative candidate for modeling fire-related problems.
INTERNATIONAL JOURNAL OF THERMAL SCIENCES
(2024)
Article
Thermodynamics
Weixin Zhang, Yehang Xie, Yuqiang Ding, Zhao Liu, Zhenping Feng
Summary: This study investigated the impact of upstream slot leakage on the endwall film cooling characteristics of turbine blades. Pressure Sensitive Paint (PSP) technology was used to measure the film cooling characteristics, and numerical analysis was conducted to evaluate the aerodynamic performance. It was found that increasing the mass flow ratio of the upstream slot enhanced film cooling, decreased aerodynamic losses, and reduced the strength of passage vortex. However, reducing the distance between the slot and the blade leading edge only enhanced film cooling without affecting the leakage coverage area.
INTERNATIONAL JOURNAL OF THERMAL SCIENCES
(2024)
Article
Thermodynamics
Rui Zhang, Zhen-lei Li, Yan-sheng Zhang, Dong Chen, Guo Yuan
Summary: This study discusses the heat transfer behavior of different jet forms on steel tubes. The results show that the annular jet performs better in terms of cooling intensity and uniformity. The cooling performances of the two jet forms are similar when the steel tube size is small. Therefore, the planar jet can be considered for smaller diameters due to its simplicity, low cost, and convenience in application.
INTERNATIONAL JOURNAL OF THERMAL SCIENCES
(2024)
Article
Thermodynamics
A. R. Khoei, A. M. Orvati Movaffagh, A. Rezaei Sameti
Summary: This paper presents a comprehensive study on the thermo-mechanical characteristics of oxide-coated aluminum nano-powder. It is found that the thermal conductivity of oxide-coated aluminum nano-powder is significantly lower than that of the bulk aluminum, and it is affected by the density and temperature.
INTERNATIONAL JOURNAL OF THERMAL SCIENCES
(2024)
Article
Thermodynamics
Yanjin Wang, Jintao Xiong, Lingyu Chen, Zhihai Lv, Qian Wang
Summary: A solar radiation transfer model for spray cooling double skin facade (SC-DSF) is proposed in this study. The model is validated by experimental results and various influence factors are analyzed. The effectiveness of adjusting droplet coverage rate and size is also evaluated.
INTERNATIONAL JOURNAL OF THERMAL SCIENCES
(2024)
Article
Thermodynamics
Bostjan Zajec, Blaz Mikuz, Anil Kumar Basavaraj, Marko Matkovic, Matej Tekavcic, Martin Draksler, Leon Cizelj, Bostjan Koncar
Summary: We have developed an advanced experimental setup to investigate flow and heat transfer in an annular channel. The setup allows heat transfer measurements and flow visualization using a temperature-controlled inner tube. Measurements can be conducted in both single-phase and two-phase flow regimes. The setup ensures a uniform velocity field in the annular channel using specially designed inlet and outlet headers. The inner copper tube is heated by water and contains turbulators for enhanced heat transfer and thermocouples for temperature measurement. A three-dimensional conjugate heat transfer CFD model has been developed and validated to accurately estimate heat losses in the setup. This study demonstrates the importance of numerical simulations in improving the interpretation of complex experimental results.
INTERNATIONAL JOURNAL OF THERMAL SCIENCES
(2024)
Article
Thermodynamics
Weijie Chen, Ke Wang, Yongqing Wang, Shantung Tu, Zunchao Liu, Huijuan Su
Summary: In this study, a novel gradient porosity transpiration cooling plate structure (GP-TCPS) is proposed to alleviate heat transfer deterioration caused by non-uniform temperature distribution in transpiration cooling plate structure (TCPS). Computational fluid dynamics (CFD) and response surface method (RSM) were used for qualitative and quantitative analysis of the flow and heat transfer of GP-TCPS. The optimized structure of GP-TCPS significantly improves temperature uniformity, injection pressure, and average cooling efficiency compared to traditional TCPS.
INTERNATIONAL JOURNAL OF THERMAL SCIENCES
(2024)
Article
Thermodynamics
R. Essam, A. Elsaid, W. K. Zahra
Summary: This study presents a novel bioheat model for simulating heat transfer in skin tissue. The model offers an improved representation of thermal dynamics in the skin and has been validated using numerical solutions and experimental measurements. The study highlights the importance of incorporating vascular inlet parameters and thermal relaxation effects in the thermal profile, and suggests potential applications in thermal therapy and wound healing.
INTERNATIONAL JOURNAL OF THERMAL SCIENCES
(2024)
Article
Thermodynamics
Dongbo Shi, Tao Xu, Zifeng Chen, Di Zhang, Yonghui Xie
Summary: The cooling structure design of turbine blades is crucial for the safety and reliability of the gas turbine set. This research investigates different arrangement schemes, including dimple/protrusion arrangements, to enhance the cooling performance. The results show that the arrangement scheme with both passes arranged by dimples has the best comprehensive thermal performance.
INTERNATIONAL JOURNAL OF THERMAL SCIENCES
(2024)
Article
Thermodynamics
Emrehan Guersoy, Hayati Kadir Pazarlioglu, Mehmet Guerdal, Engin Gedik, Kamil Arslan
Summary: The thermo-hydraulic performance of Al2O3/H2O nanofluid with different nanoparticle shapes flowing in a sudden expansion tube with variable sudden expansion inclination angles and elliptical dimpled fins with different diameters were numerically investigated. The results showed that the nanoparticle shapes, sudden expansion inclination angles, and elliptical dimpled fin have significant impact on the thermo-hydraulic performance. This study reveals the novelty and importance of these factors in the research.
INTERNATIONAL JOURNAL OF THERMAL SCIENCES
(2024)
Article
Thermodynamics
Rukun Hu, Xinyu Huang, Xinyu Gao, Liu Lu, Xiaohu Yang, Bengt Sund
Summary: This study examines the impact of applying bottom cross-cut on PCM's spatial distribution in a horizontal LHTES unit using numerical simulation. The findings show that bottom cross-cut can improve the heat storage rate and natural convection heat transfer gain.
INTERNATIONAL JOURNAL OF THERMAL SCIENCES
(2024)
