Dynamics of Atmospheres and Oceans最新文献

{"title":"High accuracy computational approach to study Casson hybrid nanofluid flow under induced magnetic field inside wavy walls configuration having peristaltic motion with entropy generation","authors":"Noreen Sher Akbar ,&nbsp;Javaria Akram ,&nbsp;S. Ijaz ,&nbsp;Zaib Jahan ,&nbsp;Taseer Muhammad ,&nbsp;Muhammad Bilal Habib ,&nbsp;M. Fiaz Hussain ,&nbsp;M. Farooq","doi":"10.1016/j.dynatmoce.2025.101609","DOIUrl":"10.1016/j.dynatmoce.2025.101609","url":null,"abstract":"<div><div>The current research observes the intricate dynamics of two-dimensional Casson hybrid nanofluid flow along a propagating wavy channel. Incorporating effects owing to the induced magnetic field, the hybrid nanofluid, thermal radiation, and mixed convection in the flow of blood containing graphene oxide and the molybdenum disulfide nanoparticles, the research also focuses on determining the efficiency of the system by focusing on the factors contributing to irreversibility of the system. The impact of the induced magnetic field is incorporated through Maxwell equations, and the Casson model is adopted to depict the rheology of the blood. The no-slip conditions for velocity and temperature are observed along boundary walls. The dimensionless mathematical model is linearized under the lubrication approximation. The final set of ordinary differential equations is then solved through a robust finite element technique in which the computational domain is discretized into thousands of nodes. The obtained linear equations are then handled through the Gaussian elimination technique in Python. The iterative process was kept repeating until a convergence criterion of <span><math><mrow><mn>1</mn><mo>×</mo><msup><mrow><mn>10</mn></mrow><mrow><mo>−</mo><mn>9</mn></mrow></msup></mrow></math></span> is achieved. The analysis of fluid flow properties for various parameters is performed through graphical results. Temperature is found to be raised by the thermal radiation parameter. Fluid flow is accelerated via a larger Casson parameter and magnetic Reynolds number. This model has a direct application in high-tech dynamism and heat management structures, such as biomedical devices and dense electronic cooling campaigns.</div></div>","PeriodicalId":50563,"journal":{"name":"Dynamics of Atmospheres and Oceans","volume":"112 ","pages":"Article 101609"},"PeriodicalIF":2.0,"publicationDate":"2025-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145417062","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Double-layer stratification of Cross fluid flow with viscous dissipation and variable thermal conductivity","authors":"T. Salahuddin ,&nbsp;A. Maqsood ,&nbsp;Muhammad Awais ,&nbsp;Mair Khan ,&nbsp;Anum Tanveer ,&nbsp;Samia Elattar","doi":"10.1016/j.dynatmoce.2025.101614","DOIUrl":"10.1016/j.dynatmoce.2025.101614","url":null,"abstract":"<div><div>In this study, we analyse the boundary layer flow and heat transport of a two-dimensional Cross fluid model flowing over a linearly stretched sheet. The variable thermal conductivity, mass diffusivity, chemical interactions, and viscous dissipation are also used to depict intricate transport processes. To simulate realistic stratified boundary layers, double stratification is included in both the temperature and concentration fields. By using the boundary layer approximation approach, the governing partial differential equations are obtained. The transformed ordinary differential equations are calculated by using the suitable transformations. The modelled problem is graphically handled using numerical techniques (BVP4c) in MATLAB software. Graphical representations of important factors on concentration, velocity and temperature fields are illustrated. The findings show that when the thermal stratification parameter is increased, then the wall temperature declines. For the same range of variance, solutal stratification also reduces surface concentration. The power law index and Weissenberg number reduce the velocity of fluid. The Eckert number, which measures viscous dissipation, greatly increases fluid heating and thickens the thermal boundary layer. The higher inputs of chemical reaction lower the concentration region. The variable thermal conductivity enhances the temperature region, and variable mass diffusion augments the concentration profile. The arrangement of the boundary layer is significantly influenced by the combined impacts of stratification, dissipation, and varied transport characteristics.</div></div>","PeriodicalId":50563,"journal":{"name":"Dynamics of Atmospheres and Oceans","volume":"112 ","pages":"Article 101614"},"PeriodicalIF":2.0,"publicationDate":"2025-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145571252","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Computational study of thermal effects on squeezing flow of water based (TiO2−Zn) hybrid nanofluid in a parallel plates for microelectronics dispersal","authors":"Mazhar Hussain ,&nbsp;Sadia Hameed ,&nbsp;Noreen Sher Akbar ,&nbsp;Taseer Muhammad","doi":"10.1016/j.dynatmoce.2025.101607","DOIUrl":"10.1016/j.dynatmoce.2025.101607","url":null,"abstract":"&lt;div&gt;&lt;div&gt;The unsteady squeezing flow of a hybrid nanofluid made up of water-suspended zinc &lt;span&gt;&lt;math&gt;&lt;mrow&gt;&lt;mo&gt;(&lt;/mo&gt;&lt;mi&gt;Zn&lt;/mi&gt;&lt;mo&gt;)&lt;/mo&gt;&lt;/mrow&gt;&lt;/math&gt;&lt;/span&gt; and titanium dioxide &lt;span&gt;&lt;math&gt;&lt;mrow&gt;&lt;mo&gt;(&lt;/mo&gt;&lt;mi&gt;Ti&lt;/mi&gt;&lt;msub&gt;&lt;mrow&gt;&lt;mi&gt;O&lt;/mi&gt;&lt;/mrow&gt;&lt;mrow&gt;&lt;mn&gt;2&lt;/mn&gt;&lt;/mrow&gt;&lt;/msub&gt;&lt;mo&gt;)&lt;/mo&gt;&lt;/mrow&gt;&lt;/math&gt;&lt;/span&gt; nanoparticles trapped between two infinitely parallel plates is examined in this work. The need for advanced thermal management in applications where traditional fluids have poor thermal conductivity, like lubrication devices, cooling units, propulsion systems, and microelectronics, is what drives the issue. To simulate realistic operating conditions, the model incorporates radiative heat transfer, mixed convection, time-dependent magnetic field, and heat absorption. The governing partial differential equations of mass, momentum, and energy are transformed into coupled nonlinear ordinary differential equations using similarity transformations and solved numerically with MATLAB’s &lt;strong&gt;bvp4c&lt;/strong&gt; solver. Results show that increasing the unsteadiness squeezing parameter accelerates the fluid motion and enhances convective heat transfer, reducing the temperature profile by up to 18 % compared with the baseline case. Suction reduces boundary layer thickness and increases heat transfer rate, while injection has the opposite effect. Stretching initially accelerates fluid motion but is eventually counteracted by viscous damping, squeezing, and Lorentz forces. Mixed convection enhances velocity by up to 12 % before destabilizing the flow at higher values. Radiation and heat absorption parameters significantly raise the temperature profile, with heat absorption increasing thermal energy near the plates by about 15 %. The novelty of this work lies in combining a time-dependent magnetic field, radiative transfer, heat absorption, and squeezing flow for the &lt;span&gt;&lt;math&gt;&lt;mrow&gt;&lt;mo&gt;(&lt;/mo&gt;&lt;mi&gt;Ti&lt;/mi&gt;&lt;msub&gt;&lt;mrow&gt;&lt;mi&gt;O&lt;/mi&gt;&lt;/mrow&gt;&lt;mrow&gt;&lt;mn&gt;2&lt;/mn&gt;&lt;/mrow&gt;&lt;/msub&gt;&lt;mo&gt;−&lt;/mo&gt;&lt;mi&gt;Zn&lt;/mi&gt;&lt;mo&gt;/&lt;/mo&gt;&lt;msub&gt;&lt;mrow&gt;&lt;mi&gt;H&lt;/mi&gt;&lt;/mrow&gt;&lt;mrow&gt;&lt;mn&gt;2&lt;/mn&gt;&lt;/mrow&gt;&lt;/msub&gt;&lt;mi&gt;O&lt;/mi&gt;&lt;mo&gt;)&lt;/mo&gt;&lt;/mrow&gt;&lt;/math&gt;&lt;/span&gt; hybrid nanofluid, which has not been previously addressed. These findings provide quantitative insights into optimizing hybrid nanofluid-based cooling technologies for engineering applications.&lt;/div&gt;&lt;div&gt;Quantitatively, the results reveal that the velocity of the &lt;span&gt;&lt;math&gt;&lt;mrow&gt;&lt;mo&gt;(&lt;/mo&gt;&lt;mi&gt;Zn&lt;/mi&gt;&lt;mi&gt;–&lt;/mi&gt;&lt;mi&gt;Ti&lt;/mi&gt;&lt;msub&gt;&lt;mrow&gt;&lt;mi&gt;O&lt;/mi&gt;&lt;/mrow&gt;&lt;mrow&gt;&lt;mn&gt;2&lt;/mn&gt;&lt;/mrow&gt;&lt;/msub&gt;&lt;mo&gt;/&lt;/mo&gt;&lt;mspace&gt;&lt;/mspace&gt;&lt;msub&gt;&lt;mrow&gt;&lt;mi&gt;H&lt;/mi&gt;&lt;/mrow&gt;&lt;mrow&gt;&lt;mn&gt;2&lt;/mn&gt;&lt;/mrow&gt;&lt;/msub&gt;&lt;mi&gt;O&lt;/mi&gt;&lt;mo&gt;)&lt;/mo&gt;&lt;/mrow&gt;&lt;/math&gt;&lt;/span&gt; hybrid nanofluid decreases by up to &lt;strong&gt;14 %&lt;/strong&gt; with increasing magnetic parameter, while the unsteadiness parameter enhances velocity by nearly &lt;strong&gt;11 %&lt;/strong&gt;. Heat transfer is found to increase by about &lt;strong&gt;17 %&lt;/strong&gt; under suction and by nearly &lt;strong&gt;19 %&lt;/strong&gt; with stronger thermal radiation, whereas heat absorption reduces the Nuss","PeriodicalId":50563,"journal":{"name":"Dynamics of Atmospheres and Oceans","volume":"112 ","pages":"Article 101607"},"PeriodicalIF":2.0,"publicationDate":"2025-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145519638","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Poiseuille flow of Jeffrey fluid with variable transport properties in porous media under magnetic and radiative effects","authors":"Mubbashar Nazeer ,&nbsp;Ali B.M. Ali ,&nbsp;Farooq Hussain ,&nbsp;N. Beemkumar ,&nbsp;Khayrilla Kurbonov ,&nbsp;Vatsal Jain ,&nbsp;M. Ijaz Khan ,&nbsp;Nidhal Ben Khedher","doi":"10.1016/j.dynatmoce.2025.101599","DOIUrl":"10.1016/j.dynatmoce.2025.101599","url":null,"abstract":"<div><h3>Objective</h3><div>The aim of this study is to analyze the momentum and heat transfer characteristics within a porous medium influenced by thermal radiation, slip boundary conditions, and temperature-dependent viscosity and thermal conductivity.</div></div><div><h3>Problem statement</h3><div>The Poiseuille flow of MHD Jeffrey fluid through the horizontal infinite slippery walls filled by porous medium is discussed in this theoretical analysis under the contribution of variably viscosity and thermal conductivity along viscous dissipation and thermal radiation effects.</div></div><div><h3>Methodology</h3><div>The problem is simplified into ordinary differential equations through the dimensionless numbers and parameters. The resultant boundary values problem is solved by using the numerical technique (shooting method based on Runge-Kutta method) to regulate the velocity and temperature profiles. The graphs of velocity and temperature are drawn against the dimensionless parameters and numbers under the acceptable range.</div></div><div><h3>Outcomes</h3><div>The outcome of the study reveals that the temperature dependent viscosity improves the flow phenomena and thermal profile, but variable thermal conductivity declines the profile of temperature. The velocity slip upgrades the velocity distribution and thermal sip enhances the temperature field. The velocity and thermal profile of Jeffrey fluid is superior to the Newtonian fluid under the impact of each dimensionless parameter and numbers.</div></div><div><h3>Applications</h3><div>The results offer valuable insights for applications that demand effective thermal regulation and accurate fluid flow control, enhancing their relevance to both engineering and biomedical fields.</div></div><div><h3>Originality/value</h3><div>Earlier research has not presented a comparative investigation of Newtonian and non-Newtonian fluid flows through porous media, considering the combined influences of a uniform magnetic field, thermal radiation, slip boundary conditions, and temperature-dependent viscosity and thermal conductivity. This study is undertaken to address this identified gap in literature.</div></div>","PeriodicalId":50563,"journal":{"name":"Dynamics of Atmospheres and Oceans","volume":"112 ","pages":"Article 101599"},"PeriodicalIF":2.0,"publicationDate":"2025-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145097761","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Assessment of precipitation reanalysis product ERA5 on summer extreme precipitation in the Yellow River Basin","authors":"Guangyu Lan,&nbsp;Yun Liang,&nbsp;Yucheng Ma","doi":"10.1016/j.dynatmoce.2025.101603","DOIUrl":"10.1016/j.dynatmoce.2025.101603","url":null,"abstract":"<div><div>Based on the rain gauge-based gridded precipitation data from the CN05.1 dataset, the applicability of ERA5 in representing summer extreme precipitation in the Yellow River Basin (YRB) was evaluated from three aspects: climatology, deterministic and probabilistic assessment, and the spatiotemporal characteristics of the leading modes. The results showed that the ERA5 reanalysis demonstrates capability in capturing climatological characteristics of precipitation and extreme precipitation over the YRB, albeit with intensified climatological means and standard deviations, coupled with opposing linear trends. In terms of interannual variability, its precipitation estimates demonstrate notably higher accuracy in the recent decade compared to earlier periods. Deterministic evaluation reveals superior representation of general precipitation compared to intense precipitation. Probabilistic assessments indicate that uncertainties predominantly originate from the upper and northern middle reaches of the YRB, accompanied by systematic biases in probabilistic estimations of increased extreme precipitation amounts and decreased extreme precipitation days. While ERA5 successfully reproduces spatial patterns of the first two dominant modes of precipitation and extreme precipitation across the YRB, it amplifies anomalous signals. ERA5 accurately simulates interannual cycles associated with the first mode, but introduces spurious decadal signals in the second mode's temporal evolution.</div></div>","PeriodicalId":50563,"journal":{"name":"Dynamics of Atmospheres and Oceans","volume":"112 ","pages":"Article 101603"},"PeriodicalIF":2.0,"publicationDate":"2025-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145362471","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Interannual rainfall variability in Northeast Brazil influenced by Pacific and Atlantic climate modes","authors":"Evelin Landin Vitorio ,&nbsp;Thiago Silva ,&nbsp;Isabelle Vilela ,&nbsp;Edvânia Santos ,&nbsp;Doris Veleda","doi":"10.1016/j.dynatmoce.2025.101596","DOIUrl":"10.1016/j.dynatmoce.2025.101596","url":null,"abstract":"<div><div>Northeast Brazil (NEB) is a climatically diverse region that includes semi-arid zones highly vulnerable to droughts and coastal areas frequently affected by extreme rainfall and flooding. These extremes pose significant challenges to water security, agriculture, and infrastructure. Effective climate forecasting in NEB requires a comprehensive understanding of multi-basin interactions, as they play a pivotal role in shaping regional precipitation patterns. Monitoring the simultaneous influences of both the Pacific and Atlantic climate indices is crucial for improving prediction accuracy, given the complex and interconnected nature of ocean-atmosphere dynamics that affect the region. This study investigates 75 years (1948–2022) of Pacific and Atlantic climate modes and their impact on NEB precipitation. Composite analyses were conducted using the 25th and 75th percentiles of sea surface temperature (SST) anomalies to define the warm and cold phases of each climate index. The results show distinct rainfall patterns across the NEB, with delayed responses to different oceanic indices. In Northern NEB (NNEB), the positive phases of Atlantic Meridional Mode (AMM) and El Niño-Southern Oscillation (ENSO) reduce rainfall, while the South Atlantic Ocean Dipole (SAOD) and Tropical South Atlantic (TSA) increase it. In Northern Eastern NEB (ENEBn), the positive phases of the AMM and Niño 1 + 2 decrease rainfall, while the South Atlantic Warm Pool (SAWP) enhances it. Simultaneous influences of the Pacific and Atlantic indices are associated with intense precipitation or drought events.</div></div>","PeriodicalId":50563,"journal":{"name":"Dynamics of Atmospheres and Oceans","volume":"112 ","pages":"Article 101596"},"PeriodicalIF":2.0,"publicationDate":"2025-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145057278","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Non-Darcy and Joule heating in MHD convective micropolar heat transfer flow over a stretchy cooling sheet with variable heat gain","authors":"T. Venu ,&nbsp;MD. Shamshuddin ,&nbsp;S.O. Salawu ,&nbsp;Subhajit Panda","doi":"10.1016/j.dynatmoce.2025.101615","DOIUrl":"10.1016/j.dynatmoce.2025.101615","url":null,"abstract":"<div><div>The research intends to characterize the thermal performance in micropolar fluid flows on a vertically elongated porous sheet with buoyancy-induced forces. The model incorporates the distribution of a non-uniform heat source/sink, Darcy dissipation, and the fluid flows across a porous substrate. The mathematical problem is non-dimensionalized under the similarity transformation approach as a coupled set of ordinary differential equations from the principal partial differential equations. A similarity transformation is done on the model to reduce it to ordinary differential equations are subsequently solved by the Runge-Kutta 4th order method utilizing the shooting scheme to evaluate numerical findings of dependent quantities of physical importance through MATLAB. The impact of varied parameters on the fluid momentum, angular momentum, and energy was analyzed and shown graphically. The key results revealed that the Darcy porosity meaningfully affects the momentum and thermal boundary layer. This brings about a higher wall shear stress. Micropolar fluid term contributes significantly to the microrotation and shear stress distributions development. Boundary convective conditions spur a nonlinear thermal distribution response that is sensitive to the Biot number variation for an effective boundary thermal exchange.</div></div>","PeriodicalId":50563,"journal":{"name":"Dynamics of Atmospheres and Oceans","volume":"112 ","pages":"Article 101615"},"PeriodicalIF":2.0,"publicationDate":"2025-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145571253","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Influence of Cattaneo-Christov radiative heat flux in magnetized flow performance of three different materials with variable constraints","authors":"Muhammad Yasir ,&nbsp;Karim Choubani ,&nbsp;Muhammad Naveed Khan ,&nbsp;Mohammed A. Almeshaal ,&nbsp;Mohamed Hussien","doi":"10.1016/j.dynatmoce.2025.101608","DOIUrl":"10.1016/j.dynatmoce.2025.101608","url":null,"abstract":"<div><div>The phase change transition aspects in various non-Newtonian fluid flow analyses have been examined, motivated by the progressive relaxation properties of flow and its applied benefits in the rheological characterization of various dynamic fluids. A thermal radiation-based mechanism with mass diffusion process and magnetized flow properties of three significant models of micropolar fluid, Casson fluid, and Maxwell fluid are briefly analyzed in this study. The melting heat transport phenomenon of all fluids is briefly explained with variables physical characteristics based on exponential function. By taking the medium of a stretched sheet, the radiative flow problem is scrutinized under the theory of boundary layer. Moreover, significant theory of Cattaneo Christov is imposed through modified Fourier and Ficks laws to discuss the thermal process and mass diffusion phenomenon. The physical factor of viscous dissipation along with thermal radiation is also incorporated. The velocity slip constraint is taken on the boundary surface. By taking both weak and strong concentrations of microparticles, the physical characteristics of micropolar fluid along with other Maxwell fluid and Casson fluid are graphically exhibited through bvp4c technique in MATLAB package. This comparative study yields the fact that radiation parameter significantly upsurges the temperature field of Casson fluid as compared to other fluids.</div></div>","PeriodicalId":50563,"journal":{"name":"Dynamics of Atmospheres and Oceans","volume":"112 ","pages":"Article 101608"},"PeriodicalIF":2.0,"publicationDate":"2025-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145362473","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Energy transport in ternary hybrid nanofluid with variable thermal conductivity under the combined effects of electroviscous, electric potential, and heat generation","authors":"Shafiq Ahmad ,&nbsp;Aamir Abbas Khan ,&nbsp;Muhammad Naveed Khan ,&nbsp;Salah Knani ,&nbsp;N. Ameer Ahammad ,&nbsp;Ibrahim E. Elseesy","doi":"10.1016/j.dynatmoce.2025.101619","DOIUrl":"10.1016/j.dynatmoce.2025.101619","url":null,"abstract":"<div><div>This article uses squeezing plates containing ternary hybrid nanofluid to scrutinize the behavior of transient electroviscous fluid flow with an induced magnetic field. By dissolving the constituents, such as silicon carbide, aluminum oxide, and multiwall carbon nanotubes, in a base fluid of water, a ternary hybrid nanofluid <span><math><mrow><mi>M</mi><mi>W</mi><mi>C</mi><mi>N</mi><mi>T</mi><mo>+</mo><mi>A</mi><msub><mrow><mi>l</mi></mrow><mrow><mn>2</mn></mrow></msub><msub><mrow><mi>O</mi></mrow><mrow><mn>3</mn></mrow></msub><mo>+</mo><mi>S</mi><mi>i</mi><mi>C</mi><mo>/</mo><msub><mrow><mi>H</mi></mrow><mrow><mn>2</mn></mrow></msub><mi>O</mi></mrow></math></span> was created. The current work aims to increase the energy transfer rate for technical and industrial applications. In the presence of heat generation, thermal radiation, and varying thermal conductivity, fluid flow exhibits its thermal behavior. Through the use of similarity substitution, an ordinary differential equation (ODE) set is obtained from a system of partial differential equations (PDEs) representing the ternary hybrid nanofluid flow. After that, using the bvp4c approach, the dimensionless ordinary differential equations in the nonlinear set are solved. On ternary hybrid nanofluid (<span><math><mrow><mi>M</mi><mi>W</mi><mi>C</mi><mi>N</mi><mi>T</mi><mo>+</mo><mi>A</mi><msub><mrow><mi>l</mi></mrow><mrow><mn>2</mn></mrow></msub><msub><mrow><mi>O</mi></mrow><mrow><mn>3</mn></mrow></msub><mo>+</mo><mi>S</mi><mi>i</mi><mi>C</mi><mo>/</mo><msub><mrow><mi>H</mi></mrow><mrow><mn>2</mn></mrow></msub><mi>O</mi></mrow></math></span>) and unary nanofluid (<span><math><mrow><mi>A</mi><msub><mrow><mi>l</mi></mrow><mrow><mn>2</mn></mrow></msub><msub><mrow><mi>O</mi></mrow><mrow><mn>3</mn></mrow></msub><mo>/</mo><msub><mrow><mi>H</mi></mrow><mrow><mn>2</mn></mrow></msub><mi>O</mi></mrow></math></span>), the graphical and numerical results are found against the many parameters. The findings show that, in comparing to unary nanofluids, ternary hybrid nanofluids have a greater impact on heat transfer rate owing to the fact that the inclusion of nanofluids to the base fluid intensifies heat transport rate.</div></div>","PeriodicalId":50563,"journal":{"name":"Dynamics of Atmospheres and Oceans","volume":"112 ","pages":"Article 101619"},"PeriodicalIF":2.0,"publicationDate":"2025-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145618100","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"High-resolution simulations of tropical cyclone rapid intensity variability: The sensitivity to microphysics and planetary boundary layer scheme combinations","authors":"Chen Chen ,&nbsp;Jiangnan Li","doi":"10.1016/j.dynatmoce.2025.101583","DOIUrl":"10.1016/j.dynatmoce.2025.101583","url":null,"abstract":"<div><div>The rapid intensification (RI) or rapid weakening (RW) of tropical cyclones (TC) is a challenging problem for forecasters. In numerical models, the selection of parameterization schemes, such as microphysics (MP) schemes and planetary boundary layer (PBL) schemes, introduces significant uncertainties in predicting TC intensity. The mechanisms behind the combining effects of different parameterization schemes on TC rapid intensity changes remain unclear. This study uses the Weather Research and Forecasting (WRF) model with various combinations of the WSM6, WSM7, Goddard MP schemes, and the YSU, QNSE and BouLac PBL schemes to conduct multiple high resolution simulation experiments on the TC Mujigae (2015), which experienced both RI and RW processes. The results show that the amount and radial distribution of latent heat release from the early stage of the simulation have close ties with the structure and intensity of the TC, while the surface enthalpy flux plays a relatively secondary role in TC intensity changes. When substantial latent heat release occurs closer to the TC center at the pre-RI period, the eyewall convection intensifies, leading to a higher convective burst (CB) index, faster formation of a compact structure, greater tangential kinetic energy, and RI. An ample surface enthalpy flux is not the key factor triggering the RI process in the experiments. It does not enable the failed group to simulate RI, but it can enhance the intensity in the successful group. The TCs that simulate RI show significantly reduced latent heat and energy supply from the boundary layer after landfall, leading to the RW process. Compared with the actual TC track, intensity, precipitation, brightness temperature, and reflectivity, the Goddard_YSU combination is the best among our experiments, accurately simulating RI and replicating RW. Latent heat from microphysics and the CB index correlate more strongly with TC intensity variations than surface enthalpy flux.</div></div>","PeriodicalId":50563,"journal":{"name":"Dynamics of Atmospheres and Oceans","volume":"111 ","pages":"Article 101583"},"PeriodicalIF":2.0,"publicationDate":"2025-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144766660","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}