International Journal of Thermofluids最新文献

{"title":"Second law efficiency and thermal entropy generation of 30:70% of glycerol + water based SiO2 nanofluids in a thermosyphon flat plate collector: Experimental and Bayesian artificial neural network algorithm","authors":"L.S. Sundar ,&nbsp;Sérgio M.O. Tavares ,&nbsp;Korada V Sharma ,&nbsp;António M.B. Pereira","doi":"10.1016/j.ijft.2024.101013","DOIUrl":"10.1016/j.ijft.2024.101013","url":null,"abstract":"<div><div>This research examines the thermal entropy generation, frictional entropy generation, entropy generation number, and energy efficiency, which were experimentally assessed for a flat plate collector functioning under thermosyphon conditions utilizing a SiO₂/30:70% glycerol and water nanofluid mixture. The artificial neural network with Bayesian regularization was employed to predict the gathered data. The research was conducted between 09:00 and 16:30 hours, with volume loadings varying from 0.25 to 1.0%. The time intervals of period-1 (09:00 to 13:00 hours) and period-2 (13:00 to 16:30 hours) were considered for clarity. The optimal boost for all parameters occurred at mid-day (13:00 hrs), as indicated by the data. The thermal entropy generation diminished to 2.72%, however the frictional entropy generation and exergy efficiency improved to 71.81% and 333.21%, respectively, with 1.0% volume of nanofluid at a Reynolds number of 718.36, compared to the base fluid. At a nanofluid concentration of 1.0% vol. and a Reynolds number of 718.36, the entropy generation number is similarly diminished to 1.05%. SiO₂ nanofluids were employed to diminish irreversibilities and consequently enhance second law energy efficiency. The Bayesian regularization program utilizes the gathered data to provide very accurate estimations. The determined correlation coefficient values for thermal entropy generation, thermal exergy destruction, frictional entropy generation, frictional exergy destruction, exergy efficiency, and entropy generation number are 0.86977, 0.87323, 0.99584, 0.99714, 0.99015, and 0.99022, respectively. Multi linear regression correlations were also proposed based on the experimental data.</div></div>","PeriodicalId":36341,"journal":{"name":"International Journal of Thermofluids","volume":"25 ","pages":"Article 101013"},"PeriodicalIF":0.0,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143161081","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Computational analysis of thermo-solutal Marangoni convective unsteady stagnation point flow of tetra hybrid nanofluid past rotating sphere with activation energy","authors":"Munawar Abbas ,&nbsp;Hawzhen Fateh M. Ameen ,&nbsp;Jihad Younis ,&nbsp;Nargiza Kamolova ,&nbsp;Ebenezer Bonyah ,&nbsp;Hafiz Muhammad Ghazi","doi":"10.1016/j.ijft.2024.101025","DOIUrl":"10.1016/j.ijft.2024.101025","url":null,"abstract":"<div><div>There are many applications for thermo-solutal Marangoni convection in science and engineering. Projectiles, thermal transportation, electrical fuel, gas turbines, nuclear power plants, renewable energy, and aeronautical engineering are just a few examples of the applications of these two ideas. Considering the aforementioned uses, the present work examines the characteristics of thermo-solutal Marangon convection on the Darcy-Forchheimer stagnation point flow of MHD tetra hybrid nanofluid around a sphere rotating with activation energy. A tetra hybrid nanofluid composed of copper (Cu), molybdenum disulfide (MOS₂), titanium oxide (Ti<em>O</em>_2,), iron oxide (<em>Fe</em>₃<em>O</em>₄), and water is used as the inappropriate fluid. Utilizing this model helps optimize energy systems such as solar collectors, increase the efficiency of chemical reactors, and improve heat and mass transfer in microelectronic cooling systems. Better performance and energy efficiency are ensured by its assistance in comprehending fluid behaviour in automotive and aerospace cooling mechanisms. Using the proper similarity variables, ordinary differential equations (ODEs) are generated from the nonlinear governing equations. A shooting method and the bvp4c method are utilized to obtain the numerical solution of the reduced boundary conditions and equations. Thermal distribution and rate of heat transfer improve but concentration distribution declines as nanoparticle volume friction rises.</div></div>","PeriodicalId":36341,"journal":{"name":"International Journal of Thermofluids","volume":"25 ","pages":"Article 101025"},"PeriodicalIF":0.0,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143161517","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Development of cure kinetics models for drying nitrile-butadiene rubber latex film with computational fluid dynamics simulation","authors":"Chakrit Suvanjumrat ,&nbsp;Kittipos Loksupapaiboon","doi":"10.1016/j.ijft.2024.101022","DOIUrl":"10.1016/j.ijft.2024.101022","url":null,"abstract":"<div><div>Dipped products undergo vulcanization or a curing process to create rubber film coats on their molds. A significant challenge in the rubber latex curing process is achieving an even degree of curing in dip-molded products. In the current era, simulation methods like Computational Fluid Dynamics (CFD) offer a solution to this issue. This study focuses on developing CFD techniques to simulate the curing process of nitrile-butadiene rubber (NBR) latex film. Non-isothermal differential scanning calorimetry tests were performed for NBR latex curing with constant heating rates of 2.5, 5, 10, and 20 K/min. Consequently, the activation energy was determined and utilized to derive curing reaction models. Fourteen reaction models were implemented to identify the most suitable one, which was determined to exhibit R² values ranging from 0.991 to 0.998 when compared with experimental data. The proposed curing reaction model was subsequently developed and integrated into the CHT solver of the OpenFOAM software. The modified OpenFOAM solver was validated with experimental results of hot-air flow past a squared NBR film, confirming its accuracy. It was applied using conjugate heat transfer and convective boundary condition techniques for curing NBR film, achieving an R² of 0.9749 and 0.9748, respectively. These applications enabled the visualization of the NBR curing degree distribution on the surface of thin film. The proposed solver serves as a valuable tool for estimating optimal conditions in the curing process of rubber-coated films on complicated shapes of dipped products, such as rubber gloves, facilitating further research.</div></div>","PeriodicalId":36341,"journal":{"name":"International Journal of Thermofluids","volume":"25 ","pages":"Article 101022"},"PeriodicalIF":0.0,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143161520","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Thermofluids analysis of four novel anchor-shaped turbulator and eco-friendly nanofluid (GAGNPs /H2O) in a parabolic trough solar collector: A CFD modeling approach","authors":"M. Gholinia ,&nbsp;A.H. Ghobadi ,&nbsp;E. Shahcheraghi ,&nbsp;M. Armin","doi":"10.1016/j.ijft.2024.101028","DOIUrl":"10.1016/j.ijft.2024.101028","url":null,"abstract":"<div><div>In this paper, four new turbulator models are implemented inside the absorber tube of the Parabolic Trough Solar Collector (PTSC) in a linear arrangement (anchored shape) to regulate and standardize its surface temperature. The study analyzes the impact of parameters such as heat transfer coefficient (h), friction factor (f), Nusselt number (Nu), and outlet temperature (T_out). Moreover, a new type of nanofluid (GAGNPs/H₂O) has been utilized, consisting of gallic acid combined with graphene nanoplatelets (GNPs), known for its environmental friendliness. The solar heat flux (SHF) in the environment is calculated using the Monte Carlo Radiation Transfer Method (MCRT) with C++ code. The key findings indicate that at Reynolds number 25,000, replacing the simple absorber tube with the DEA, DEA-f, FEA, and FEA-f models increases the Nusselt number by <span><math><mo>∼</mo></math></span>3.99 %, <span><math><mo>∼</mo></math></span>5.40 %, <span><math><mo>∼</mo></math></span>14.08 %, and <span><math><mo>∼</mo></math></span>16.20 %, respectively. Additionally, increasing fin height from 34 mm to 58 mm at this Reynolds number results in <span><math><mo>∼</mo></math></span> 18.26 % increase in the Nusselt number, while increasing the outlet temperature by <span><math><mo>∼</mo></math></span>0.08 %. Increasing the top height from 34 mm to 58 mm can increase efficiency by up to 8.20 %. The efficiency of the PTSC decreased by approximately <span><math><mo>∼</mo></math></span>3.04 % when the inlet temperature was increased from 300 K to 345 K in FEA-f turbulator (H: 58 mm). Furthermore, increasing the concentration of GAGNPs/H₂O nanofluid from 0.025 % to 0.1 % in the same FEA-f turbulator (H: 58 mm) resulted in <span><math><mo>∼</mo></math></span> 4.50 % increase in efficiency.</div></div>","PeriodicalId":36341,"journal":{"name":"International Journal of Thermofluids","volume":"25 ","pages":"Article 101028"},"PeriodicalIF":0.0,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143161890","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Artificial texturing for enhanced soft elastohydrodynamic lubrication in total knee arthroplasty","authors":"Nirav Kantilal Meghpara,&nbsp;Punit Kumar,&nbsp;Gian Bhushan","doi":"10.1016/j.ijft.2024.101035","DOIUrl":"10.1016/j.ijft.2024.101035","url":null,"abstract":"<div><div>This study proposes the utilization of artificially textured surfaces to enhance film thickness in line contacts operating under soft elastohydrodynamic lubrication. Moreover, this investigation seeks to examine the effect of roughness of the surface, applied load, and average rolling speed on the efficacy of artificially textured surfaces in artificial knee joints, with the objective of enhancing the life of Total Knee Arthroplasty. The numerical analysis involves solving the elasticity and Reynolds equations. One of the two surfaces is artificially textured by superimposing a sinusoidal profile on its macro-geometry. The Newton-Raphson technique is employed to obtain the numerical solution of the governing equations discretized using the finite difference approach. For comparative analysis, both artificially textured and smooth surface conditions are individually considered in this study. The artificially textured surface exhibits a considerable enhancement in the thickness of the lubricating film compared to the smooth surface case under identical operating conditions. Furthermore, it is noted that the efficacy of the artificially textured surface becomes more evident at higher magnitudes of applied load and lower average rolling speeds. The significant enhancement up to 8 % in minimum film thickness achieved in this study represents a notable and valuable contribution to the field, underscoring its novelty and potential impact.</div></div>","PeriodicalId":36341,"journal":{"name":"International Journal of Thermofluids","volume":"25 ","pages":"Article 101035"},"PeriodicalIF":0.0,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143161514","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Elucidating thermal phenomena of non-Newtonian experimental data based copper-alumina-ethylene glycol hybrid nanofluid in a cubic enclosure with central heated plate by machine learning validations of D3Q27 MRT-LBM","authors":"Md. Mamun Molla ,&nbsp;Md Farhad Hasan ,&nbsp;Md. Mahadul Islam","doi":"10.1016/j.ijft.2024.101033","DOIUrl":"10.1016/j.ijft.2024.101033","url":null,"abstract":"&lt;div&gt;&lt;div&gt;One of the major challenges in designing an efficient heating and cooling equipment is the consideration and availability of cost-effective fluids. The potential of hybrid nanofluid to replace oil and water in heat exchanging devices has been studied. However, further research is still required to optimise and implement hybrid nanofluids in an industrial setup. This study aimed to investigate power-law non-Newtonian Cu-Al&lt;span&gt;&lt;math&gt;&lt;msub&gt;&lt;mrow&gt;&lt;/mrow&gt;&lt;mrow&gt;&lt;mn&gt;2&lt;/mn&gt;&lt;/mrow&gt;&lt;/msub&gt;&lt;/math&gt;&lt;/span&gt;O&lt;span&gt;&lt;math&gt;&lt;msub&gt;&lt;mrow&gt;&lt;/mrow&gt;&lt;mrow&gt;&lt;mn&gt;3&lt;/mn&gt;&lt;/mrow&gt;&lt;/msub&gt;&lt;/math&gt;&lt;/span&gt;-ethylene glycol (EG) hybrid nanofluids in a three-dimensional (3D) cavity, featuring a heated flat plate at the centre, using the Multiple-relaxation-time (MRT) lattice Boltzmann method (LBM). For this purpose, the numerically stable D3Q27 lattices model for the MRT-thermal LBM was employed. The simulation was conducted through parallel computing techniques based on the Compute Unified Device Architecture (CUDA) C++ programming facilitated by NVIDIA GPU. Various governing parameters were considered, including the Rayleigh number (&lt;span&gt;&lt;math&gt;&lt;mrow&gt;&lt;mi&gt;R&lt;/mi&gt;&lt;mi&gt;a&lt;/mi&gt;&lt;mo&gt;=&lt;/mo&gt;&lt;mn&gt;1&lt;/mn&gt;&lt;msup&gt;&lt;mrow&gt;&lt;mn&gt;0&lt;/mn&gt;&lt;/mrow&gt;&lt;mrow&gt;&lt;mn&gt;4&lt;/mn&gt;&lt;/mrow&gt;&lt;/msup&gt;&lt;mo&gt;,&lt;/mo&gt;&lt;mn&gt;1&lt;/mn&gt;&lt;msup&gt;&lt;mrow&gt;&lt;mn&gt;0&lt;/mn&gt;&lt;/mrow&gt;&lt;mrow&gt;&lt;mn&gt;5&lt;/mn&gt;&lt;/mrow&gt;&lt;/msup&gt;&lt;mo&gt;,&lt;/mo&gt;&lt;mn&gt;1&lt;/mn&gt;&lt;msup&gt;&lt;mrow&gt;&lt;mn&gt;0&lt;/mn&gt;&lt;/mrow&gt;&lt;mrow&gt;&lt;mn&gt;6&lt;/mn&gt;&lt;/mrow&gt;&lt;/msup&gt;&lt;/mrow&gt;&lt;/math&gt;&lt;/span&gt;), the power-law index (&lt;span&gt;&lt;math&gt;&lt;mrow&gt;&lt;mi&gt;n&lt;/mi&gt;&lt;mo&gt;=&lt;/mo&gt;&lt;mn&gt;0&lt;/mn&gt;&lt;mo&gt;.&lt;/mo&gt;&lt;mn&gt;8&lt;/mn&gt;&lt;mo&gt;,&lt;/mo&gt;&lt;mn&gt;1&lt;/mn&gt;&lt;mo&gt;.&lt;/mo&gt;&lt;mn&gt;0&lt;/mn&gt;&lt;mo&gt;,&lt;/mo&gt;&lt;mn&gt;1&lt;/mn&gt;&lt;mo&gt;.&lt;/mo&gt;&lt;mn&gt;4&lt;/mn&gt;&lt;/mrow&gt;&lt;/math&gt;&lt;/span&gt;), and the volume fraction of nanoparticles &lt;span&gt;&lt;math&gt;&lt;mi&gt;ϕ&lt;/mi&gt;&lt;/math&gt;&lt;/span&gt; ranging from 0% to 2%. The model was validated and obtained outcomes were analysed qualitatively and quantitatively. Finally, a cross-validation performance analysis was conducted using a machine learning model and good accuracy was obtained. Some of the key findings suggested that due to the existence of the flat heat radiator, the fluid flow and temperature profiles were distributed from the central position but the upper side of the cavity mostly experienced the greater rate of fluid and heat transfer. Consequently, the velocity of the thermal fluid faced a great obstacle due to the central radiator and temporarily became static. In addition, the &lt;span&gt;&lt;math&gt;&lt;mover&gt;&lt;mrow&gt;&lt;mi&gt;N&lt;/mi&gt;&lt;mi&gt;u&lt;/mi&gt;&lt;/mrow&gt;&lt;mo&gt;¯&lt;/mo&gt;&lt;/mover&gt;&lt;/math&gt;&lt;/span&gt; values were found to be approximately 26.6% greater as &lt;span&gt;&lt;math&gt;&lt;mi&gt;ϕ&lt;/mi&gt;&lt;/math&gt;&lt;/span&gt; increased from 0 to 0.02 for &lt;span&gt;&lt;math&gt;&lt;mrow&gt;&lt;mi&gt;n&lt;/mi&gt;&lt;mo&gt;=&lt;/mo&gt;&lt;mn&gt;0&lt;/mn&gt;&lt;mo&gt;.&lt;/mo&gt;&lt;mn&gt;8&lt;/mn&gt;&lt;/mrow&gt;&lt;/math&gt;&lt;/span&gt; and &lt;span&gt;&lt;math&gt;&lt;mrow&gt;&lt;mi&gt;R&lt;/mi&gt;&lt;mi&gt;a&lt;/mi&gt;&lt;mo&gt;=&lt;/mo&gt;&lt;mn&gt;1&lt;/mn&gt;&lt;msup&gt;&lt;mrow&gt;&lt;mn&gt;0&lt;/mn&gt;&lt;/mrow&gt;&lt;mrow&gt;&lt;mn&gt;6&lt;/mn&gt;&lt;/mrow&gt;&lt;/msup&gt;&lt;/mrow&gt;&lt;/math&gt;&lt;/span&gt;. Nevertheless, as fluid changed phase from shear-thinning (&lt;span&gt;&lt;math&gt;&lt;mrow&gt;&lt;mi&gt;n&lt;/mi&gt;&lt;mo&gt;=&lt;/mo&gt;&lt;mn&gt;0&lt;/mn&gt;&lt;mo&gt;.&lt;/mo&gt;&lt;mn&gt;8&lt;/mn&gt;&lt;/mrow&gt;&lt;/math&gt;&lt;/span&gt;) to Newtonian (&lt;span&gt;&lt;math&gt;&lt;mrow&gt;&lt;mi&gt;n&lt;/mi&gt;&lt;mo&gt;=&lt;/mo&gt;&lt;mn&gt;1&lt;/m","PeriodicalId":36341,"journal":{"name":"International Journal of Thermofluids","volume":"26 ","pages":"Article 101033"},"PeriodicalIF":0.0,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143168133","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Influence of adiabatic semi-circular grooved in backward-facing step on thermal-hydraulic characteristics of nanofluid","authors":"Farhan Lafta Rashid ,&nbsp;Muhammad Asmail Eleiwi ,&nbsp;Tahseen Ahmad Tahseen ,&nbsp;Hayder I. Mohammed ,&nbsp;Sohaib Abdulrahman Tuama ,&nbsp;Arman Ameen ,&nbsp;Ephraim Bonah Agyekum","doi":"10.1016/j.ijft.2024.101052","DOIUrl":"10.1016/j.ijft.2024.101052","url":null,"abstract":"<div><div>This work examines the thermal-hydraulic performance of Al₂O₃-water nanofluids inside a backward-facing step (BFS) configuration characterized by insulated hot walls and semi-circular grooves, employing computational fluid dynamics (CFD) simulations in ANSYS Fluent. The main objective is to analyze the effects of nanoparticle concentration (2 %, 4 %, and 6 % by volume) and flow Reynolds number (10–250) on heat transfer and flow dynamics, with an emphasis on improving thermal management systems. The study primarily examines the lack of comprehension of nanofluid behavior in BFS geometries under laminar flow circumstances and investigates the correlation between flow recirculation, reattachment processes, and thermal boundary layer attributes. The findings indicate that elevated Reynolds numbers and nanoparticle concentrations markedly enhance heat transfer rates, with thermal convection coefficients rising by approximately 1.031, 1.063, and 1.096 times for 2 %, 4 %, and 6 % nanofluid concentrations, respectively, in comparison to the base fluid. The findings offer significant insights for enhancing thermal systems, including heat exchangers and cooling devices, with recommendations for further research in turbulent regimes and different geometries. This study enhances the existing research on nanofluid uses in sophisticated thermal management systems.</div></div>","PeriodicalId":36341,"journal":{"name":"International Journal of Thermofluids","volume":"26 ","pages":"Article 101052"},"PeriodicalIF":0.0,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143168134","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Thermal management and biocompatibility in dry machining: An experimental study of ZrO2-based cutting tool for bone machining","authors":"Phanindra Addepalli ,&nbsp;Worapong Sawangsri ,&nbsp;Saiful Anwar Che Ghani","doi":"10.1016/j.ijft.2024.101001","DOIUrl":"10.1016/j.ijft.2024.101001","url":null,"abstract":"<div><div>This paper aims to assess the thermal properties and biocompatibility of zirconia-based bio ceramic cutting tools for bone surgery compared to stainless steel (SS316L) tools. Because of their biocompatibility, materials such as zirconia (ZrO₂) are now widely utilized to reconstruct and replace bone tissue. The study compares wet and dry machining to analyze the effects of temperature and cell behaviour. By performing a quantitative MTT (yellow 3-(4,5-dimethylthiazole-2-yl)-2,5-diphenyltetrazolium-bromide) proliferation assay, the current study showed that ZrO₂ had higher cell viability and metabolic activity than SS316L. The experiments included primary chondrocyte cells from chicken femoral condyles incubated at 37 °C and 5 % CO₂ with increased cell survival and proliferation in the presence of ZrO₂. Thermal performance was evaluated on a CNC vertical milling machine with the help of K-type thermocouples to measure the maximum (<em>T_max</em>) and average (<em>T_mean)</em> temperature. ZrO₂-based tools had resulted in lower <em>T_max</em> and <em>T_mean</em> throughout the experiment regardless of the cutting parameters, which minimize the thermal injury and improve surgical results. Saline irrigation in wet machining helped in reducing temperature peaks, while dry machining had the advantages of not polluting the environment and being cheaper. Due to its low thermal conductivity and hardness, ZrO₂ can be used as an effective material for metal tools in surgical operations to minimize thermal effect and increase the tool lifespan.</div></div>","PeriodicalId":36341,"journal":{"name":"International Journal of Thermofluids","volume":"25 ","pages":"Article 101001"},"PeriodicalIF":0.0,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143161008","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The role of green buildings in achieving the sustainable development goals","authors":"Abdul Ghani Olabi ,&nbsp;Nabila Shehata ,&nbsp;Usama Hamed Issa ,&nbsp;O.A. Mohamed ,&nbsp;Montaser Mahmoud ,&nbsp;Mohammad Ali Abdelkareem ,&nbsp;M.A. Abdelzaher","doi":"10.1016/j.ijft.2024.101002","DOIUrl":"10.1016/j.ijft.2024.101002","url":null,"abstract":"<div><div>The Sustainable Development Goals (SDGs) are a group of 17 objectives established by the United Nations (UN) and specified in resolutions adopted by the UN general assembly on September 25, 2015, and January 1, 2016. These broad aims, which collectively encompass 169 goals, are interconnected even though they have their own unique objectives. Numerous environmental, social, and economic development challenges are covered under the SDGs. This paper discusses the role of green buildings in achieving the UN's SDGs and investigates the issues related to their design and barriers. It is clearly demonstrated that the reliance on renewable energy resources is one of the key elements of green buildings. Additionally, the integration between these resources is considered a promising approach to achieving net zero energy consumption. This paper also aims to emphasize the positive effects that these green buildings have on people, the environment, and the economy, which ensures their survival. It also discusses several aspects related to green buildings, including materials, site evaluation, and greening existing buildings.</div></div>","PeriodicalId":36341,"journal":{"name":"International Journal of Thermofluids","volume":"25 ","pages":"Article 101002"},"PeriodicalIF":0.0,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143161074","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Impact of a wavy wall triangular porous cylinder on diffusive-mixed convection in a lid-driven triangular cavity","authors":"Duna T. Yaseen ,&nbsp;Amani J. Majeed ,&nbsp;Sahib S. Ahmed ,&nbsp;Muneer A. Ismael","doi":"10.1016/j.ijft.2024.101007","DOIUrl":"10.1016/j.ijft.2024.101007","url":null,"abstract":"<div><div>Analyzing the double diffusive mixed convection inside a triangular enclosure with moving lid and involving a wavy porous cylinder emitting a concentration is addressed in this paper. Such a problem simulates various processes such as crystallization, absorption, and distillation where both heat and mass transfer are involved. The horizontal wall of the lid-driven cavity maintains a constant temperature, while the inclined walls of the triangle cavity are thermally insulated. The wavy wall of the inner porous cylinder releases a constant species and kept colder than the moving wall. This study presents a novel way for improving heat transmission from a surface utilizing porous cylinders. Using a porous cylinder with e porosity can improve the performance of heat transfer. The governing equations are transformed to a non-dimensional form and solved with the finite element method. The study examines how porosity <span><math><mrow><mo>(</mo><mrow><mi>ε</mi></mrow><mo>)</mo></mrow></math></span>, Darcy number (Da), undulation number (N), and wave amplitude (A) affect fluid flow, heat transfer and concentration distribution. More improvement in the porous cylinder performance is discovered to be possible with increasing <span><math><mrow><mo>(</mo><mrow><mi>ε</mi></mrow><mo>)</mo></mrow></math></span>, (N), (Ri), and (<em>Re</em>), particularly at large (Da) levels. It is discovered that the average Nusselt number rises by the porous cylinder wall's waviness. The results indicate that in certain cases, increasing N from 1 to 5 raises the Nusselt number by 6 % while increasing the Darcy number from 10⁻³ to 10⁻² could improve convective heat transmission in the liquid by 7.5 %.</div></div>","PeriodicalId":36341,"journal":{"name":"International Journal of Thermofluids","volume":"25 ","pages":"Article 101007"},"PeriodicalIF":0.0,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143161076","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}