International Journal of Heat and Mass Transfer最新文献

{"title":"An immersed boundary-discrete unified gas-kinetic scheme for non-Oberbeck–Boussinesq thermal convection with curved surfaces","authors":"Xin Wen ,&nbsp;Wei Lin ,&nbsp;Wei Wang ,&nbsp;Yang Chen ,&nbsp;Kui Li ,&nbsp;Lian-Ping Wang","doi":"10.1016/j.ijheatmasstransfer.2025.127100","DOIUrl":"10.1016/j.ijheatmasstransfer.2025.127100","url":null,"abstract":"<div><div>In this paper, an immersed boundary-discrete unified gas-kinetic scheme (IB-DUGKS) is developed for non-Oberbeck–Boussinesq (NOB) natural convection with curved surfaces. A double distribution function model with the Bhatnagar–Gross–Krook (BGK) collision model is employed with the first distribution function representing the density and velocity fields, and the second distribution function determining the total energy. To incorporate the IB force and the heat source/sink, the external forcing term and an extra source term are introduced to the kinetic model. The IB forcing term only contributes to the leading order of the momentum and energy equation. By proper design, the source term plays a dual role, it includes the IB source/sink in the energy equation, and it allows an arbitrary Prandtl number by adjusting the heat flux term, demonstrating a great flexibility of mesoscopic methods particularly in treating thermal coupling. This IB-DUGKS enables the simulation of NOB natural convection flows, governed by the fully compressible Navier–Stokes–Fourier system. Simulations of natural convection between the outer square cavity and inner hot cylinders are performed to investigate the NOB effect. Both OB and NOB flows can be considered with the current scheme by selecting different relative temperature differences. The numerical results are in excellent agreement with the literature results, indicating that the current IB-DUGKS is accurate and robust for NOB thermal flow simulations. Finally, the NOB effects are demonstrated using the temperature field, velocity field, and overall heat transfer by contrasting the NOB solutions with the corresponding OB solutions.</div></div>","PeriodicalId":336,"journal":{"name":"International Journal of Heat and Mass Transfer","volume":"247 ","pages":"Article 127100"},"PeriodicalIF":5.0,"publicationDate":"2025-04-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143869475","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Conformal geometric design and additive manufacturing for special-shaped TPMS heat exchangers","authors":"Yijin Zhang ,&nbsp;Fei Peng ,&nbsp;Heran Jia ,&nbsp;Zeang Zhao ,&nbsp;Panding Wang ,&nbsp;Shengyu Duan ,&nbsp;Hongshuai Lei","doi":"10.1016/j.ijheatmasstransfer.2025.127146","DOIUrl":"10.1016/j.ijheatmasstransfer.2025.127146","url":null,"abstract":"<div><div>Additive manufacturing (AM) technology has advanced the development of heat exchangers based on Triply periodic minimal surfaces (TPMS). Although TPMS-based heat exchangers enhanced heat transfer capabilities, designing engineering special-shaped heat exchangers that conform to AM process constraints required reducing supports and preventing leakage. This paper proposed a novel conformal filling method to design special-shaped TPMS heat exchangers, which improved fragmentation and leakage by locally altering the cell shape. The study investigated ten different structures based on tubes, Gyroid, Schwarz-D, I-WP, and Primitive and each filled in various orientations. The effects of design parameters of TPMS heat exchangers were investigated through numerical and experimental studies. How controlling the shape and manufacturing parameters during the fabrication process was investigated to ensure the designed structure would not leak. Different TPMS metal heat exchangers, fabricated by AlSi10Mg powder using Laser powder bed fusion (L-PBF), were evaluated by micro-computed tomography (μ-CT) to verify the completeness of the heat exchanger channels. Results showed that the method improved the heat transfer efficiency by enhancing the flow uniformity. Conformal I-WP structure achieved a twice increase and Primitive structure enhanced by three times. This method benefits the manufacturing and heat exchange capabilities of AM heat exchangers.</div></div>","PeriodicalId":336,"journal":{"name":"International Journal of Heat and Mass Transfer","volume":"247 ","pages":"Article 127146"},"PeriodicalIF":5.0,"publicationDate":"2025-04-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143869476","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Design Principles of Thermoelectric-Microchannel Hybrid Cooling Modules for Hotspot Thermal Management","authors":"Yuqing Wei ,&nbsp;Yifan Lei ,&nbsp;Yuhan Yao ,&nbsp;Ronggui Yang ,&nbsp;Xin Qian","doi":"10.1016/j.ijheatmasstransfer.2025.127113","DOIUrl":"10.1016/j.ijheatmasstransfer.2025.127113","url":null,"abstract":"<div><div>Hotspot thermal management is crucial for microprocessors, radial-frequency electronics, and power electronics. Hybrid cooling combining thermoelectrics and microchannels (TEC-MC) offers an effective solution for active and precise temperature control. This work develops an analytical model for predicting the heat flux, hotspot temperatures, and coefficient of performance (<span><math><mrow><mi>C</mi><mi>O</mi><mi>P</mi></mrow></math></span>) of TEC-MC hybrid coolers, by treating thermoelectrics as an adjustable thermal resistor. The model incorporates heat spreading resistances to account for both the in-plane and the cross-plane heat conduction from the hotspot, enabling computation of hotspot temperatures four orders of magnitude faster than three-dimensional finite element simulations. Our method can be seamlessly interfaced with multi-objective optimization algorithms for the co-design of TEC and MC. Results revealed intricate correlations among different parameters. An optimal thickness of thermoelectric legs is identified which scales linearly with the filling ratio of TEC when optimizing the cooling power. On the other hand, thinner thermoelectric legs are favored when optimizing <span><math><mrow><mi>C</mi><mi>O</mi><mi>P</mi></mrow></math></span>. Moreover, as the heat transfer performance of the MC heat sink improves, the reduced hot-side temperature of the TEC allows for a further decrease in TEC thickness, leading to higher <span><math><mrow><mi>C</mi><mi>O</mi><mi>P</mi></mrow></math></span>. Finally, the Pareto front is identified to quantify the trade-offs between the maximum cooling power and the optimal <span><math><mrow><mi>C</mi><mi>O</mi><mi>P</mi></mrow></math></span>. We proposed a co-design workflow and showed that simultaneously decreasing the thickness of thermoelectric legs and the thermal resistance of the MC is pivotal for achieving both high cooling power and improved <span><math><mrow><mi>C</mi><mi>O</mi><mi>P</mi></mrow></math></span>. This study offers a guideline for developing hybrid cooling systems for hotspot thermal management.</div></div>","PeriodicalId":336,"journal":{"name":"International Journal of Heat and Mass Transfer","volume":"247 ","pages":"Article 127113"},"PeriodicalIF":5.0,"publicationDate":"2025-04-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143859939","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Numerical investigation of two-dimensional electro-thermo-hydrodynamic turbulence: Energy budget and scaling law analysis","authors":"Yifei Guan ,&nbsp;Qi Wang ,&nbsp;Mengqi Zhang ,&nbsp;Yu Zhang ,&nbsp;Jian Wu","doi":"10.1016/j.ijheatmasstransfer.2025.127094","DOIUrl":"10.1016/j.ijheatmasstransfer.2025.127094","url":null,"abstract":"<div><div>In fluid systems involving heat and mass transfers, convection is a fundamental phenomenon, where the large-scale motion of a fluid is driven, for example, by a thermal gradient and/or an electric field. When the driving forces are large, the fluid system exhibits a chaotic behavior and even develops into turbulence. Modeling convection has given rise to the development of turbulence theory and energetic analysis for multi-physics systems. However, most of previous works have been limited to relatively simple thermal convection phenomena driven by solely buoyancy force. In this work, we formulate the energetic relation of the turbulent electro-thermo-hydrodynamic (ETHD) convection and develop a two-dimensional (2D) spectral solver for numerical analysis of ETHD turbulence for a variety of driving parameters (forces). From the numerical analysis, we find a modified scaling behavior of heat transfer by the electric force, and discover a new scaling behavior of the portion of kinetic energy contributed by buoyancy force as a function of a dimensionless forcing ratio. Finally, we show that the energy budget in the boundary layer of the 2D ETHD turbulence follows the scaling law previously found for the traditional 2D Rayleigh–Bénard Convection. This work marks the first step into energy budget and scaling law analysis of ETHD systems and significantly improve our understanding turbulent convection driven by both thermal and electric forces.</div></div>","PeriodicalId":336,"journal":{"name":"International Journal of Heat and Mass Transfer","volume":"247 ","pages":"Article 127094"},"PeriodicalIF":5.0,"publicationDate":"2025-04-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143864377","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Experimental investigation of supercritical CO2 heat transfer characteristics in a three-rod bundle","authors":"Qianqian Ren ,&nbsp;Qinggang Qiu ,&nbsp;Yu Liu ,&nbsp;Yuwei Peng ,&nbsp;Peiyu Li ,&nbsp;Xiaojing Zhu","doi":"10.1016/j.ijheatmasstransfer.2025.127141","DOIUrl":"10.1016/j.ijheatmasstransfer.2025.127141","url":null,"abstract":"<div><div>The investigation of the heat transfer properties of supercritical CO₂ (SCO₂) within rod bundles is crucial for optimizing the design of the supercritical CO₂ direct-cooled reactor. This study presents an experimental study on the heat transfer characteristics of supercritical CO₂ in a three-rod bundle. The experiments were conducted under pressures ranging from 8 to 11 MPa, heat fluxes from 31 to 123 kW/m², mass fluxes from 270 to 830 kg/(m²·s), and inlet temperatures from 5 to 114 °C. The internal wall temperature of the heated rod was measured with a sliding thermocouple device. To assess the accuracy of the measurements, a validation experiment was performed by comparing the temperature readings from the sliding thermocouple with those from a fixed thermocouple over a temperature range from room temperature to 350 °C. The maximum difference between the two measurements was approximately 3 °C, confirming the reliability of the sliding thermocouple measurements. The effects of heat flux, mass flux, and pressure on heat transfer were systematically analyzed. Seven heat transfer correlations based on tube data and three correlations derived from rod bundle data were evaluated with the experimental results. The findings reveal that the Jackson 1 correlation exhibits the highest agreement with the experimental data. Furthermore, two new correlations were developed based on the section-averaged wall temperature and section-maximum wall temperature, respectively. These newly proposed correlations not only enhance prediction accuracy but also increase their utility for practical applications.</div></div>","PeriodicalId":336,"journal":{"name":"International Journal of Heat and Mass Transfer","volume":"247 ","pages":"Article 127141"},"PeriodicalIF":5.0,"publicationDate":"2025-04-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143859941","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Thermal performance of a kW-level long distance loop heat pipe with an air-cooling condenser","authors":"Jingwei Fu ,&nbsp;Lizhan Bai ,&nbsp;Yunfei Zhang ,&nbsp;Hongxiang Lan ,&nbsp;Guiping Lin","doi":"10.1016/j.ijheatmasstransfer.2025.127145","DOIUrl":"10.1016/j.ijheatmasstransfer.2025.127145","url":null,"abstract":"<div><div>Loop heat pipe (LHP) promises great application potential in avionics thermal management due to its advantage in good attitude adaptability, long distance heat transport, and excellent heat transfer performance. In this work, a kW-level 4.0 m transport distance LHP with an air-cooling condenser was designed and fabricated, in which dual compensation chambers were employed to improve the evaporator attitude adaptability, and three parallel transport lines were adopted to reduce the flow resistance and enhance the capillary limit. Comprehensive experimental study was implemented mainly including the startup characteristics, power increment test, heat transfer capacity and thermal resistance variation. The influence of the attitudes of the evaporator and condenser on the LHP thermal performance was particularly studied. Based on the experimental results, some important conclusions have been drawn: 1) the LHP can achieve successful startup in the heat load range of 0–300 W at different evaporator attitudes; 2) the maximum heat transfer capacity can reach up to 1000 W over 4.0 m transport distance; 3) the LHP can reach the minimum system thermal resistance of 0.046 ℃/W at the heat load of 600 W. The design method and experimental results provide good reference and guidance for the future applications of LHPs in avionics thermal management.</div></div>","PeriodicalId":336,"journal":{"name":"International Journal of Heat and Mass Transfer","volume":"247 ","pages":"Article 127145"},"PeriodicalIF":5.0,"publicationDate":"2025-04-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143864376","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The formation mechanism and process regulation of collapse defects in high-power laser penetration welding of 20mm thick 316L stainless steel plates","authors":"Yiyang Hu ,&nbsp;Chunming Wang ,&nbsp;Zehui Liu ,&nbsp;Zhongshun Zhao ,&nbsp;Fei Yan","doi":"10.1016/j.ijheatmasstransfer.2025.127123","DOIUrl":"10.1016/j.ijheatmasstransfer.2025.127123","url":null,"abstract":"<div><div>Laser penetration welding provides significant efficiency advantages for single-pass joining of thick stainless steel plates. However, as plate thickness increases, the challenge of \"full penetration leads to collapse\" persists. This study successfully achieves single-pass welding formation of 20 mm thick steel plates, identifying the process bottleneck in high-power thick-plate laser full-penetration welding as the excessively large output laser spot size and addressing the welding challenges associated with thicker plates. A novel numerical model was employed to explore the mechanisms behind collapse defects. To quantitatively assess weld quality, the degrees of \"underfill\" and \"sagging\" were evaluated based on national standards, and various weld formations were categorized accordingly. The results indicated that welding with a large spot size of 937.5 μm rarely produced a well-formed weld. In contrast, using a smaller spot size of 600 μm created a partial process window, where the laser power threshold for \"full penetration leads to collapse\" decreased from 25,000 W to 20,000 W. High-speed imaging and numerical simulations further revealed two critical factors necessary for achieving high-quality weld formation. First, the mass of molten material lost as spatter and droplets must remain minimal. Second, a well-defined backflow channel must be established, ensuring the upward movement of molten material under the influence of the Marangoni effect. This study highlighted the crucial role of spot size in the laser penetration welding of thick plates and provides guidance for selecting optimal laser parameters. Additionally, it elucidated the underlying mechanisms of weld formation, offering theoretical insights for process regulation.</div></div>","PeriodicalId":336,"journal":{"name":"International Journal of Heat and Mass Transfer","volume":"247 ","pages":"Article 127123"},"PeriodicalIF":5.0,"publicationDate":"2025-04-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143859942","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Improving the Accuracy of Transient Plane Source Thermal Conductivity Measurements: Novel Analytical Models, Fitting Approaches, and Systematic Sensitivity Analysis","authors":"Jiaqi GU,&nbsp;Saad Bin SAFIULLAH,&nbsp;Yang LU,&nbsp;Ziyan QIAN,&nbsp;Qiye ZHENG","doi":"10.1016/j.ijheatmasstransfer.2025.127110","DOIUrl":"10.1016/j.ijheatmasstransfer.2025.127110","url":null,"abstract":"&lt;div&gt;&lt;div&gt;Accurate thermal conductivity (&lt;em&gt;λ&lt;/em&gt;) measurement is critical for optimizing material performance in applications where effective heat exchange and dissipation are paramount. Among contact methods, the transient plane source (TPS) method (ISO 22007-2:2022) is widely used for its efficiency and versatility, particularly for bulk solid samples. However, we reveal that for high-&lt;em&gt;λ&lt;/em&gt; materials (&lt;em&gt;λ&lt;/em&gt; &gt; 30 W/(m·K)), TPS measurements can suffer from significant systematic errors—up to 97%—due to the limitations of traditional analytical models and fitting methods in addressing sensor/sample interface thermal resistance (&lt;em&gt;R&lt;sub&gt;c&lt;/sub&gt;&lt;/em&gt;) and heat conduction within the sensor. Furthermore, the lack of in-depth investigation into measurement sensitivity and parameter correlations in the TPS method hampers the accurate fitting and identification of sample &lt;em&gt;λ&lt;/em&gt;, particularly under the influence of other unknown parameters such as sample heat capacity (&lt;em&gt;C&lt;/em&gt;) and &lt;em&gt;R&lt;sub&gt;c&lt;/sub&gt;&lt;/em&gt;. This study addresses these challenges by: (1) developing two novel analytical models, termed realistic sensor model (RSM) and multilayer model (MLM), that account for heat transfer within the sensor and the &lt;em&gt;R&lt;/em&gt;&lt;sub&gt;c&lt;/sub&gt; effect, both of which are neglected in the traditional model but crucial in the TPS study of high-&lt;em&gt;λ&lt;/em&gt; materials; (2) proposing an innovative temperature derivative-based analysis approach using nonlinear regression (NR) to effectively suppress the influence of the &lt;em&gt;R&lt;/em&gt;&lt;sub&gt;c&lt;/sub&gt; and the sensor geometry, which outperforms the conventional iterative linear regression of the raw temperature data; and (3) systematically analyzing the sensitivities of key parameters in different analytical and numerical models as well as parameter relationships via singular value decomposition (SVD) of the sensitivity matrix, providing deeper insights into the selection of the optimal time interval for fitting sample &lt;em&gt;λ&lt;/em&gt; and &lt;em&gt;C&lt;/em&gt;.&lt;/div&gt;&lt;div&gt;To reveal the limitations of traditional models and regression while evaluating our new analytical models and fitting methods, a reliable 3D finite element model (FEM) that replicates the actual TPS sensor with bifillar spiral heater was developed . The TPS experiments on four representative materials with significantly varied &lt;em&gt;λ&lt;/em&gt; (polymethyl methacrylate, borosilicate glass, 304 stainless steel, and aluminum) and simulated TPS data for a broad range of materials (&lt;em&gt;λ&lt;/em&gt; in 0.1–400 W/(m·K)) from our FEM simulations are utilized to systematically assess the performance of the proposed analytical model and fitting methods. We demonstrate that the proposed derivative-based approach combined with the new analytical models using two-parameters NR (NR-2) exhibits high robustness against &lt;em&gt;R&lt;sub&gt;c&lt;/sub&gt;&lt;/em&gt; and improves the accuracy of the fitted &lt;em&gt;λ&lt;/em&gt;, reducing errors from 50-97% to &lt; 10% for high-&lt;em&gt;λ&lt;/em&gt; material, which remain robust against ","PeriodicalId":336,"journal":{"name":"International Journal of Heat and Mass Transfer","volume":"247 ","pages":"Article 127110"},"PeriodicalIF":5.0,"publicationDate":"2025-04-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143859940","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Investigating the relationship of process parameter, heat-mass transfer and joint strength in Mg/Al friction stir lap welding via experiments, machine learning and numerical analysis","authors":"Ming Zhai ,&nbsp;JiaLin Yin ,&nbsp;ChunLiang Yang ,&nbsp;ChuanSong Wu ,&nbsp;HongTu Song ,&nbsp;WenZhen Zhao ,&nbsp;Lei Shi ,&nbsp;JunNan Qiao","doi":"10.1016/j.ijheatmasstransfer.2025.127143","DOIUrl":"10.1016/j.ijheatmasstransfer.2025.127143","url":null,"abstract":"<div><div>With the increasing demand for lightweight structures, Mg/Al friction stir lap welding (FSLW) has attracted more attention. In this study, the relationship of process parameter, heat-mass transfer behaviors and joint strength is comprehensively investigated by the combination method of experimental tests, machine learning and numerical analysis. Contrary to the traditional understanding, the optimal joint strength appears at low rotation rate (600 rpm) and high welding speed (90 mm/min). The developed ensemble machine learning model (gradient boosting regression + gaussian process regression) quantitatively maps process parameter - joint strength relationship. The joint strength can be effectively improved by properly decreasing the rotation rate and increasing the welding speed within the process window. Numerical analysis reveals the heat and mass transfer mechanisms. Compared with the process parameter of 1000 rpm - 60 mm/min, when the process parameters is 600 rpm - 90 mm/min, the welding temperature decreases by about 35 K and the material flow velocity decreases by about 50 mm/s. It is helpful to form smaller hook, cold lap and thinner intermetallic compounds (IMCs), which is beneficial to improve the lap joint strength. The findings show that although the increase of rotation rate can enhance the mixing of materials, excessive rotation will aggravate the materials diffusion. The balance between mechanical interlocking and metallurgical bonding can be achieved by adopting appropriate combination of process parameters. This work can provide theoretical basis for the design principle of Mg/Al FSLW process.</div></div>","PeriodicalId":336,"journal":{"name":"International Journal of Heat and Mass Transfer","volume":"247 ","pages":"Article 127143"},"PeriodicalIF":5.0,"publicationDate":"2025-04-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143859938","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Electroosmotic slip flow in peristaltic transport of non-Newtonian third-grade MHD fluid: RSM-based sensitivity analysis","authors":"R. Ellahi ,&nbsp;A. Zeeshan ,&nbsp;Samar Shafique ,&nbsp;Sadiq M. Sait ,&nbsp;Amad ur Rehman","doi":"10.1016/j.ijheatmasstransfer.2025.127121","DOIUrl":"10.1016/j.ijheatmasstransfer.2025.127121","url":null,"abstract":"<div><div>An innovative model of electroosmotic peristaltic motion produced by a third-grade non-Newtonian magnetohydrodynamics fluid within a symmetric conduit is proposed. Three nonlinear coupled partial differential equations govern the flow problem are reduced to a system of nonlinear coupled ordinary differential equations by using the approximations of long wave length and low Reynolds number. Response Surface Methodology based Central Composite Design is utilized to predict refined empirical model. The adequacy of the fitted model is assessed using an analysis of variance. The influence of the Hartman number, Deborah number, and electroosmotic parameter on pressure rise per wavelength and frictional forces is prognosticated graphically. It is observed that the axial velocity increases by increasing the values of electroosmotic parameter, however, quite a reverse behaviour in axial velocity is noted for higher values of the Helmholtz-Smoluchowski parameter, slip parameter and Hartmann number. A sensitivity analysis of physical parameters is presented. It is reveals that the Deborah number has a substantial impact on pressure rise per wavelength and frictional forces in the electroosmotic flow system.</div></div>","PeriodicalId":336,"journal":{"name":"International Journal of Heat and Mass Transfer","volume":"247 ","pages":"Article 127121"},"PeriodicalIF":5.0,"publicationDate":"2025-04-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143855678","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}