Chinese Journal of Physics最新文献

{"title":"Thermoacoustic streaming between parallel plates under magnetic fields","authors":"M.B. Arain ,&nbsp;S. Hussain ,&nbsp;S. Shaheen ,&nbsp;T. Saidani ,&nbsp;J. Hu","doi":"10.1016/j.cjph.2025.07.011","DOIUrl":"10.1016/j.cjph.2025.07.011","url":null,"abstract":"<div><div>Thermal Rayleigh-type acoustic streaming, the phenomenon in which fluid motion is caused by interacting with acoustic waves having temperature gradient, has been reported to have essential use in a wide range of applications including microfluidic mixing and thermal management applications. However, the combined influence of acoustic streaming and magnetic fields on heat transfer remains insufficiently explored. This research examines the influence of MHD on thermal Rayleigh-type acoustic streaming in a horizontal parallel plate configuration with the help of both analytical and numerical tools. Based on the value of<span><math><mrow><mi>P</mi><mi>e</mi><mo>≪</mo><mn>1</mn></mrow></math></span>, the use of the Perturbation method, for<span><math><mrow><mi>P</mi><mi>e</mi><mo>≫</mo><mn>1</mn></mrow></math></span>, numerical simulations are employed to solve the mathematical equations. This Computational analysis helps to know in detail about the relationship between acoustic streaming and magnetohydrodynamics with the goal of advancing thermal control strategies in aerospace actuators, microfluidic devices, and ultrasonic systems. The key findings show that the pair of equations present the central velocity as occurring within the flow region as it affirmed that in flow region or flow core, the flow does not depend on the viscosity, and the flow described in this equation is dictated by the magnetic field. For magnetic field on Couette flow has been gathered graphically and results depicted in the graphs affirm that flow has been controlled with the help of magnetic field. Asymptotic expression for <span><math><mrow><mi>P</mi><mi>e</mi><mo>≪</mo><mn>1</mn></mrow></math></span>, which denote time and axial direction averaged heat transfer coefficient, Nusselt number are also derived.</div></div>","PeriodicalId":10340,"journal":{"name":"Chinese Journal of Physics","volume":"97 ","pages":"Pages 883-896"},"PeriodicalIF":4.6,"publicationDate":"2025-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144809561","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Universality in tidal response close to maximum mass of compact star in f(R,T) gravity","authors":"Kumar Gaurav Sagar ,&nbsp;Neeraj Pant ,&nbsp;Brajesh Pandey","doi":"10.1016/j.cjph.2025.06.045","DOIUrl":"10.1016/j.cjph.2025.06.045","url":null,"abstract":"<div><div>The exceptional characteristics of PSR J0952-0607 including its near-breakup spin rate and faint X-ray counterpart, highlight major gaps in our understanding of the birth mechanisms of structurally stable pulsar in black widow systems. Thus an attempt is made here to develop a self-consistent model for the compact star in <span><math><mrow><mi>f</mi><mrow><mo>(</mo><mi>R</mi><mo>,</mo><mi>T</mi><mo>)</mo></mrow></mrow></math></span> framework under the vanishing complexity setup. The obtained field equations are then solved for an anisotropic fluid distribution, to analyze the role of <span><math><mi>α</mi></math></span> coupling in shaping the key stellar parameters. Our result emphasizes that more massive and denser core can exist in stable equilibrium within the <span><math><mrow><mi>f</mi><mrow><mo>(</mo><mi>R</mi><mo>,</mo><mi>T</mi><mo>)</mo></mrow></mrow></math></span> framework. One of the key findings of our analysis is the existence of a universality class that limits the tidal response as the compact star approaches its maximum stable mass.</div></div>","PeriodicalId":10340,"journal":{"name":"Chinese Journal of Physics","volume":"97 ","pages":"Pages 1-14"},"PeriodicalIF":4.6,"publicationDate":"2025-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144654366","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Dirac neutrino mass in a U(1)L model with T7×Z4 symmetry","authors":"V.V. Vien ,&nbsp;Mayengbam Kishan Singh","doi":"10.1016/j.cjph.2025.06.031","DOIUrl":"10.1016/j.cjph.2025.06.031","url":null,"abstract":"<div><div>We propose a <span><math><mrow><mi>U</mi><msub><mrow><mrow><mo>(</mo><mn>1</mn><mo>)</mo></mrow></mrow><mrow><mi>L</mi></mrow></msub></mrow></math></span> model with <span><math><mrow><msub><mrow><mi>T</mi></mrow><mrow><mn>7</mn></mrow></msub><mo>×</mo><msub><mrow><mi>Z</mi></mrow><mrow><mn>4</mn></mrow></msub></mrow></math></span> symmetry for generating Dirac neutrino mass matrix texture. The Dirac neutrino mass matrix hints for a realistic lepton mixing pattern where the explicit relations between the Yukawa-like couplings and the observed neutrino oscillation parameters are established. The Yukawa-like couplings in the charged-lepton sector are expressed in terms of three charged lepton masses while the Yukawa-like couplings in the neutrino sector are expressed in terms of neutrino oscillation parameters. The considered model is satisfied for both normal and inverted neutrino mass hierarchies and for both lower and higher octants in the light of the recent experimental data.</div></div>","PeriodicalId":10340,"journal":{"name":"Chinese Journal of Physics","volume":"97 ","pages":"Pages 239-246"},"PeriodicalIF":4.6,"publicationDate":"2025-07-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144685940","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Electromagnetic modulation of memristor-based neuronal dynamics","authors":"Yun-sha Hu ,&nbsp;Ming-xin Xu ,&nbsp;Jing-lin Xu ,&nbsp;Hong-biao Li ,&nbsp;Guo-ping Sun","doi":"10.1016/j.cjph.2025.06.044","DOIUrl":"10.1016/j.cjph.2025.06.044","url":null,"abstract":"<div><div>The cell fluid around neurons contains ions such as <span><math><msup><mrow><mi>K</mi></mrow><mrow><mo>+</mo></mrow></msup></math></span>, <span><math><mrow><mi>N</mi><msup><mrow><mi>a</mi></mrow><mrow><mo>+</mo></mrow></msup></mrow></math></span> and <span><math><mrow><mi>C</mi><msup><mrow><mi>l</mi></mrow><mrow><mo>−</mo></mrow></msup></mrow></math></span>, where ion adsorption on the neuronal membrane creates capacitive characteristics, while stochastic transport through irregular channel proteins across the membrane manifests inductive properties. This study constructs an electromagnetic-sensitive neuron model addressing electromagnetic field fluctuations during cytosol flow, incorporating flux-controlled and charge-controlled memristors to respectively participate in membrane potential voltage division and channel current shunting, with additional periodic stimulation for electrophysiological regulation. Helmholtz theorem verification is implemented for isolated neurons. Accounting for external electromagnetic field disturbances, Gaussian white noise perturbations are introduced to simulate the induced voltage components in charge-controlled memristors and induced current components in flux-controlled memristors. Membrane parameter <span><math><mi>c</mi></math></span> undergoes adaptive control considering neuronal deformation. Simulations show that periodic stimulation and memristor parameter adjustments yield chaotic, periodic, bursting, and spiking discharge modes, each with distinct energy storage traits. No significant stochastic resonance emerges under noise intervention, while parameter <span><math><mi>c</mi></math></span> achieves energy self-adaptive regulation through stabilization control.</div></div>","PeriodicalId":10340,"journal":{"name":"Chinese Journal of Physics","volume":"97 ","pages":"Pages 734-743"},"PeriodicalIF":4.6,"publicationDate":"2025-07-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144779415","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Multifractal and spatial correlation analysis of dengue transmission in Brazilian metropolitan regions","authors":"Leonardo H.S. Fernandes ,&nbsp;Jader S. Jale ,&nbsp;José P.V. Fernandes ,&nbsp;Benjamin Miranda Tabak ,&nbsp;Maria A.R. Silva","doi":"10.1016/j.cjph.2025.06.025","DOIUrl":"10.1016/j.cjph.2025.06.025","url":null,"abstract":"<div><div>This study investigates the spatial and temporal patterns of dengue incidence in three major Brazilian metropolitan regions: São Paulo, Rio de Janeiro, and Belo Horizonte. Our goal is to analyze the disease dynamics and its persistence in urban areas with different socio-environmental characteristics. We apply Multifractal Detrended Fluctuation Analysis (MF-DFA) and Moran’s Index to weekly incidence data from 2014 to 2024 to identify spatial clustering and long-term transmission patterns. Our results indicate persistent multifractal behavior in 10 cities <span><math><mfenced><mrow><msub><mrow><mi>α</mi></mrow><mrow><mn>0</mn></mrow></msub><mo>&gt;</mo><mn>0</mn><mo>.</mo><mn>5</mn></mrow></mfenced></math></span>, suggesting that dengue transmission is influenced by factors beyond seasonality and climate. High Moran index values during outbreaks confirm significant spatial clustering, emphasizing the need for localized intervention strategies. By integrating temporal fluctuations with spatial concentration analysis, this study provides insights for more effective public health policies.</div></div>","PeriodicalId":10340,"journal":{"name":"Chinese Journal of Physics","volume":"97 ","pages":"Pages 117-137"},"PeriodicalIF":4.6,"publicationDate":"2025-07-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144670851","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Enhanced Birefringence Modes of surface plasmon polariton induced by a hybrid chiral QD medium","authors":"Fatima Ghulam Kakepoto ,&nbsp;Shihua Huang ,&nbsp;Fuad A. Awwad ,&nbsp;Emad A.A. Ismail ,&nbsp;Muhammad Idrees","doi":"10.1016/j.cjph.2025.06.041","DOIUrl":"10.1016/j.cjph.2025.06.041","url":null,"abstract":"<div><div>In this study, we propose a detailed theoretical approach to explore the birefringent surface plasmon polariton (SPP) modes at the interface of a hybrid nanostructure. This nanostructure comprises a gold (Au) metal layer combined with a chiral quantum dot (CQD) medium. The characteristics of SPP in this hybrid configuration are derived using detailed analytical methods based on Maxwell’s equations, with appropriate boundary conditions applied to ensure accuracy. Additionally, the dynamics of the CQD system are analyzed using the density matrix formalism, which enables a detailed description of the quantum interactions within the medium. Our analysis demonstrates that the birefringent SPP modes, discernible in both absorption and dispersion spectra, can be effectively controlled by manipulating key parameters such as inter-dot tunneling strength and spontaneous emission rates. This tunability also extends to the propagation length and phase shift of the birefringent SPP beams, which can be modulated under the same set of conditions. The ability to control these birefringent SPP modes offers significant potential for the development of advanced imaging systems and the design of compact, efficient nanophotonic devices. By utilizing the interaction between the CQD and the metallic interface, our study not only enhances the understanding of SPP behavior in hybrid nanostructures but also opens up new possibilities for the application of photonic technologies at the nanoscale. The engineering of these birefringent SPP modes could lead to substantial advancements in high-resolution imaging, the fabrication of novel photonic circuits, and other areas critical to the progression of nanophotonics.</div></div>","PeriodicalId":10340,"journal":{"name":"Chinese Journal of Physics","volume":"96 ","pages":"Pages 1344-1353"},"PeriodicalIF":4.6,"publicationDate":"2025-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144604868","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Tunable contact properties in Cu2Te/metals via graphene interlayer","authors":"Minjun Zhou ,&nbsp;Xi Geng ,&nbsp;Xiao Fan ,&nbsp;Qiyun Deng ,&nbsp;Shiru Song ,&nbsp;Lei Gao","doi":"10.1016/j.cjph.2025.07.007","DOIUrl":"10.1016/j.cjph.2025.07.007","url":null,"abstract":"<div><div>The contact properties between two-dimensional (2D) channel materials and electrodes critically govern the overall performance of nanodevices. Recently fabricated semiconducting Cu₂Te monolayer with high carrier mobility and exceptional environmental stability is a promising channel material for high-performance nanodevices. Herein, the contact properties of Cu₂Te with various metals (Mo, W, Sb, Cu, and Ni) and the role of graphene interlayer in tailoring these interfaces are systematically investigated based on first-principles calculations. First-principles calculations reveal that, by intercalating graphene layers, the strong interactions between Cu₂Te and metallic electrodes (Mo, W, Cu, and Ni) are weakened, enabling tunable contact types via work function engineering. The n-type Ohmic contacts at Cu₂Te/Mo, Cu₂Te/W, and Cu₂Te/Cu interfaces transition to p-type behavior as the number of graphene layers increases, whereas Cu₂Te/Ni interfaces exhibit no contact-type switching. By decoupling Cu₂Te/metals, such graphene interlayers can suppress FLP and tailor contact types, which are beneficial for reconfigurable nanodevices. This work provides valuable theoretical insights for the development of high-performance Cu₂Te-based nanodevices.</div></div>","PeriodicalId":10340,"journal":{"name":"Chinese Journal of Physics","volume":"97 ","pages":"Pages 109-116"},"PeriodicalIF":4.6,"publicationDate":"2025-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144666077","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Advances in fractional chaotic systems","authors":"Guo—Cheng Wu ,&nbsp;Subir Das","doi":"10.1016/j.cjph.2025.07.001","DOIUrl":"10.1016/j.cjph.2025.07.001","url":null,"abstract":"","PeriodicalId":10340,"journal":{"name":"Chinese Journal of Physics","volume":"98 ","pages":"Pages 1-2"},"PeriodicalIF":4.6,"publicationDate":"2025-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145047922","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Particle production scenario in an algebraically coupled quintessence field with a dark matter fluid","authors":"Saddam Hussain","doi":"10.1016/j.cjph.2025.06.009","DOIUrl":"10.1016/j.cjph.2025.06.009","url":null,"abstract":"<div><div>We investigate the dynamics of an algebraically coupled quintessence field with a dark matter fluid, focusing on particle production through the action principle via a modified interaction Lagrangian. The interaction parameter serves as the source of dark matter particle production and entropy generation. As particle creation occurs due to the interaction between the field and fluid sectors, the system exhibits additional pressure. Our analysis includes studying the system’s dynamics by considering an exponential type of interaction corresponding to the field’s exponential potential. We assess the system’s background dynamics using the dynamical system stability technique to derive the constraints on the model parameters. Additionally, we determine the best-fit values of the model parameters against two combinations of data sets: (i) Cosmic Chronometer (CC) + Pantheon + SH0ES, and (ii) CC + Pantheon + SH0ES + SDSS BAO + DESI BAO. By employing a comprehensive data analysis technique, we compare the evidence of our models to flat <span><math><mi>Λ</mi></math></span>CDM. Based on the Akaike Information Criterion (AIC) and Bayesian Information Criterion (BIC), one of the models emerges as a robust alternative to <span><math><mi>Λ</mi></math></span>CDM when considering the joint data sets.</div></div>","PeriodicalId":10340,"journal":{"name":"Chinese Journal of Physics","volume":"97 ","pages":"Pages 673-695"},"PeriodicalIF":4.6,"publicationDate":"2025-07-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144766997","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Linear stability and parametric optimization of AA7075 nanofluid flow over an exponentially shrinking sheet under inclined magnetic field and thermal effects","authors":"Hemalatha Veedhuluri ,&nbsp;Ramreddy Chetteti ,&nbsp;Rashmi Dubey","doi":"10.1016/j.cjph.2025.06.037","DOIUrl":"10.1016/j.cjph.2025.06.037","url":null,"abstract":"&lt;div&gt;&lt;div&gt;This study investigates the linear temporal stability analysis of forced convection in water-based AA7075 nanofluid over an exponentially shrinking sheet, incorporating the effects of inclined magnetic field, Joule heating, and thermal radiation. Unlike previous studies that primarily focus on stability analysis, this research also explores the sensitivity of response functions. The governing ordinary differential equations, obtained via similarity transformations, are solved using MATLAB’s bvp4c solver. A parametric study is conducted over a range of physical parameters including magnetic parameter &lt;span&gt;&lt;math&gt;&lt;mrow&gt;&lt;mo&gt;(&lt;/mo&gt;&lt;mi&gt;M&lt;/mi&gt;&lt;mo&gt;)&lt;/mo&gt;&lt;/mrow&gt;&lt;/math&gt;&lt;/span&gt;, inclination angle &lt;span&gt;&lt;math&gt;&lt;mrow&gt;&lt;mo&gt;(&lt;/mo&gt;&lt;mi&gt;γ&lt;/mi&gt;&lt;mo&gt;)&lt;/mo&gt;&lt;/mrow&gt;&lt;/math&gt;&lt;/span&gt;, suction parameter &lt;span&gt;&lt;math&gt;&lt;mrow&gt;&lt;mo&gt;(&lt;/mo&gt;&lt;mi&gt;S&lt;/mi&gt;&lt;mo&gt;)&lt;/mo&gt;&lt;/mrow&gt;&lt;/math&gt;&lt;/span&gt;, shrinking parameter &lt;span&gt;&lt;math&gt;&lt;mrow&gt;&lt;mo&gt;(&lt;/mo&gt;&lt;mi&gt;λ&lt;/mi&gt;&lt;mo&gt;)&lt;/mo&gt;&lt;/mrow&gt;&lt;/math&gt;&lt;/span&gt;, AA7075 nanoparticle volume fraction &lt;span&gt;&lt;math&gt;&lt;mrow&gt;&lt;mo&gt;(&lt;/mo&gt;&lt;mi&gt;ϕ&lt;/mi&gt;&lt;mo&gt;)&lt;/mo&gt;&lt;/mrow&gt;&lt;/math&gt;&lt;/span&gt;, radiation parameter &lt;span&gt;&lt;math&gt;&lt;mrow&gt;&lt;mo&gt;(&lt;/mo&gt;&lt;mi&gt;R&lt;/mi&gt;&lt;mo&gt;)&lt;/mo&gt;&lt;/mrow&gt;&lt;/math&gt;&lt;/span&gt;, and Joule heating parameter &lt;span&gt;&lt;math&gt;&lt;mrow&gt;&lt;mo&gt;(&lt;/mo&gt;&lt;mi&gt;J&lt;/mi&gt;&lt;mo&gt;)&lt;/mo&gt;&lt;/mrow&gt;&lt;/math&gt;&lt;/span&gt;. The analysis reveals multiple solutions for certain parameter ranges and a saddle–node bifurcation is observed. Further, stability analysis confirms that only the first solution branch is stable and physically reliable. Increasing &lt;span&gt;&lt;math&gt;&lt;mrow&gt;&lt;mi&gt;M&lt;/mi&gt;&lt;mo&gt;,&lt;/mo&gt;&lt;mspace&gt;&lt;/mspace&gt;&lt;mi&gt;S&lt;/mi&gt;&lt;/mrow&gt;&lt;/math&gt;&lt;/span&gt;, and &lt;span&gt;&lt;math&gt;&lt;mi&gt;γ&lt;/mi&gt;&lt;/math&gt;&lt;/span&gt; delays boundary layer separation. In the first solution, the gradient of velocity at the wall, represented by the skin friction coefficient, increases by 10.76%, 8.19%, and 8.23% with increasing magnetic parameter &lt;span&gt;&lt;math&gt;&lt;mrow&gt;&lt;mo&gt;(&lt;/mo&gt;&lt;mi&gt;M&lt;/mi&gt;&lt;mo&gt;)&lt;/mo&gt;&lt;/mrow&gt;&lt;/math&gt;&lt;/span&gt;, suction parameter &lt;span&gt;&lt;math&gt;&lt;mrow&gt;&lt;mo&gt;(&lt;/mo&gt;&lt;mi&gt;S&lt;/mi&gt;&lt;mo&gt;)&lt;/mo&gt;&lt;/mrow&gt;&lt;/math&gt;&lt;/span&gt;, and inclination angle &lt;span&gt;&lt;math&gt;&lt;mrow&gt;&lt;mo&gt;(&lt;/mo&gt;&lt;mi&gt;γ&lt;/mi&gt;&lt;mo&gt;)&lt;/mo&gt;&lt;/mrow&gt;&lt;/math&gt;&lt;/span&gt;, respectively. The incorporation of AA7075 nanoparticles into the base fluid results in a 48.28% enhancement in the temperature gradient at the wall, reflected through the Nusselt number, in the first (stable) solution. Additionally, the Joule heating &lt;span&gt;&lt;math&gt;&lt;mrow&gt;&lt;mo&gt;(&lt;/mo&gt;&lt;mi&gt;J&lt;/mi&gt;&lt;mo&gt;)&lt;/mo&gt;&lt;/mrow&gt;&lt;/math&gt;&lt;/span&gt; and thermal radiation &lt;span&gt;&lt;math&gt;&lt;mrow&gt;&lt;mo&gt;(&lt;/mo&gt;&lt;mi&gt;R&lt;/mi&gt;&lt;mo&gt;)&lt;/mo&gt;&lt;/mrow&gt;&lt;/math&gt;&lt;/span&gt; parameters contribute to an increase in the wall temperature gradient by 13.7% and 11.9%, respectively, indicating improved thermal transport efficiency. Sensitivity analysis using Response Surface Methodology (RSM) identifies nanoparticle volume fraction as the most influential parameter, with a desirability index of 63.9% yielding optimal values of drag coefficient (2.20139) and Nusselt number (13.6657). The results are validated against limiting cases from the existing literature and show excellent","PeriodicalId":10340,"journal":{"name":"Chinese Journal of Physics","volume":"96 ","pages":"Pages 1470-1490"},"PeriodicalIF":4.6,"publicationDate":"2025-07-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144655122","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}