The European Physical Journal B最新文献

Density functional theory study of phase stability and electronic properties for L12 X3Ru and XRu3 alloys L12 X3Ru和XRu3合金相稳定性和电子性能的密度泛函理论研究

IF 1.6 4区物理与天体物理

The European Physical Journal B Pub Date : 2025-05-26 DOI: 10.1140/epjb/s10051-025-00956-9

B. O. Mnisi, E. M. Benecha, M. M. Tibane

{"title":"Density functional theory study of phase stability and electronic properties for L12 X3Ru and XRu3 alloys","authors":"B. O. Mnisi, E. M. Benecha, M. M. Tibane","doi":"10.1140/epjb/s10051-025-00956-9","DOIUrl":"10.1140/epjb/s10051-025-00956-9","url":null,"abstract":"<div><p>This study employs first-principles density functional theory (DFT) to investigate the structural, mechanical, electronic, and phonon properties of L1<sub>2</sub>-phase X<sub>3</sub>Ru and XRu<sub>3</sub> alloys (X = Sc, Ti, V, Cr, Mn, Fe, Co, Ni, Cu, and Zn). Our findings indicate that Sc<sub>3</sub>Ru, Ti<sub>3</sub>Ru, V<sub>3</sub>Ru, Mn<sub>3</sub>Ru, Zn<sub>3</sub>Ru as well as Ru<sub>3</sub>Ti, Ru<sub>3</sub>V, and Ru<sub>3</sub>Mn alloys are thermodynamically stable. All the X<sub>3</sub>Ru and XRu<sub>3</sub> alloys exhibit mechanical stability, except for Ti<sub>3</sub>Ru and Fe<sub>3</sub>Ru. The density of states results reveal metallic behavior across all the X<sub>3</sub>Ru and XRu<sub>3</sub> alloys, while charge density plots indicate metallic bonding between X and Ru, consistent with the electronic properties. Phonon dispersion curves confirm the dynamic stability in TiRu<sub>3</sub>, VRu<sub>3</sub>, CrRu<sub>3</sub>, MnRu<sub>3</sub>, FeRu<sub>3</sub>, CoRu<sub>3</sub>, CuRu<sub>3</sub>, ZnRu<sub>3</sub> as well as in Cr<sub>3</sub>Ru, Cu<sub>3</sub>Ru and Co<sub>3</sub>Ru alloys. Notably, TiRu<sub>3</sub>, VRu<sub>3</sub>, MnRu<sub>3</sub> also demonstrate thermodynamic and mechanical stability, along with higher melting temperatures compared to the widely used Ni<sub>3</sub>Al alloy. These findings lay a theoretical foundation for further experimental investigations of X<sub>3</sub>Ru and XRu<sub>3</sub> alloys, which may be promising candidates for high-temperature structural applications.</p><h3>Graphical abstract</h3><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":787,"journal":{"name":"The European Physical Journal B","volume":"98 5","pages":""},"PeriodicalIF":1.6,"publicationDate":"2025-05-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1140/epjb/s10051-025-00956-9.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144135394","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Slow–fast dynamics in small trophic chains with habitat loss 栖息地丧失的小营养链的快慢动态

IF 1.6 4区物理与天体物理

The European Physical Journal B Pub Date : 2025-05-25 DOI: 10.1140/epjb/s10051-025-00952-z

Ramya Seenivasan, Prosenjit Paul

引用次数: 0

Structural, mechanical, and optoelectronic properties of potassium-doped mixed halide perovskites Cs0.5K0.5SnX3 (X = Cl, Br, I): a first-principles study 掺钾混合卤化物钙钛矿Cs0.5K0.5SnX3 （X = Cl, Br， I）的结构、力学和光电性质：第一性原理研究

IF 1.6 4区物理与天体物理

The European Physical Journal B Pub Date : 2025-05-24 DOI: 10.1140/epjb/s10051-025-00950-1

Umair Mumtaz, Muhammad Awais, Hina Inam, Ahmed Althobaiti, Alshareef Mohammad

{"title":"Structural, mechanical, and optoelectronic properties of potassium-doped mixed halide perovskites Cs0.5K0.5SnX3 (X = Cl, Br, I): a first-principles study","authors":"Umair Mumtaz, Muhammad Awais, Hina Inam, Ahmed Althobaiti, Alshareef Mohammad","doi":"10.1140/epjb/s10051-025-00950-1","DOIUrl":"10.1140/epjb/s10051-025-00950-1","url":null,"abstract":"<div><p>The structural, mechanical, and optoelectronic properties of potassium-doped mixed halide perovskites Cs<sub>0.5</sub>K<sub>0.5</sub>SnX<sub>3</sub> (X = Cl, Br, I) have been systematically delved into within the density functional theory (DFT) framework. Structural stability was confirmed through the ground state energy <span>({(E}_{o}))</span> and Born’s mechanical stability criteria, indicating that all compounds retain a stable cubic phase. Mechanical analysis, including Poisson (<span>({varvec{upsilon}})</span>) and Pough’s ratios <span>((B/G))</span> suggests the significant ductility, making them suitable for device fabrication. Electronic structure calculations reveal that the bandgap can be tuned via halide substitution, impacting their potential for optoelectronic applications. Optical properties such as absorption, reflectivity, and optical conductivity demonstrate enhanced light-harvesting capabilities, particularly for Cs<sub>0.5</sub>K<sub>0.5</sub>SnI<sub>3</sub>. These findings highlight the potential of potassium-doped tin-based perovskites as promising candidates for photovoltaics, light-emitting diodes, and optical sensors.</p><h3>Graphical abstract</h3>\u0000<div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":787,"journal":{"name":"The European Physical Journal B","volume":"98 5","pages":""},"PeriodicalIF":1.6,"publicationDate":"2025-05-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144125696","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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}

引用次数: 0

Effect of tensile strain on the optoelectronic properties of defective Te systems MoTe2 拉伸应变对缺陷Te体系MoTe2光电性能的影响

IF 1.6 4区物理与天体物理

The European Physical Journal B Pub Date : 2025-05-24 DOI: 10.1140/epjb/s10051-025-00948-9

Zhihong Shi, Ying Wang, Nan Yang, Jinghan Ji, Guili Liu, Guoying Zhang

{"title":"Effect of tensile strain on the optoelectronic properties of defective Te systems MoTe2","authors":"Zhihong Shi, Ying Wang, Nan Yang, Jinghan Ji, Guili Liu, Guoying Zhang","doi":"10.1140/epjb/s10051-025-00948-9","DOIUrl":"10.1140/epjb/s10051-025-00948-9","url":null,"abstract":"<div><p>In this paper, the modulation of the optoelectronic properties of MoTe<sub>2</sub> defective systems by deformation is simulated using first principles. The study documents the bond lengths, defect formation energies, energy band structures, DOS, and various optical properties of the individual systems in both defect states. It is shown that pristine MoTe<sub>2</sub> is a direct band-gap semiconductor material and that both biaxial tensile strain and defect measures reduce the bandgap of the system. When 2 Te atoms are defective, and the tensile strain reaches 6%, the bandgap of the system approaches 0, corresponding to quasi-metallic properties. In terms of optical properties, both biaxial tensile strain and defects reduce the absorption and reflection peaks of the system but increase the reflectivity in the infrared region. Regarding optical properties, the defective system shows an overall decrease in absorption coefficient and reflectance in the tensile strain state, but there is some increase in the low-energy region. These findings may positively impact the flexible application of MoTe<sub>2</sub> in photovoltaics.</p><h3>Graphical abstract</h3><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":787,"journal":{"name":"The European Physical Journal B","volume":"98 5","pages":""},"PeriodicalIF":1.6,"publicationDate":"2025-05-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144125702","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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}

引用次数: 0

First-principles investigation of Mg-based MgAl2X4 (X = S, Se) spinels for optoelectronic and energy harvesting applications MgAl2X4 （X = S, Se）尖晶石在光电和能量收集中的第一性原理研究

IF 1.6 4区物理与天体物理

The European Physical Journal B Pub Date : 2025-05-24 DOI: 10.1140/epjb/s10051-025-00937-y

Ashiq Ramzan, Mudasir Younis Sofi, Mohd Shahid Khan, Javid Ali, M. Ajmal Khan

{"title":"First-principles investigation of Mg-based MgAl2X4 (X = S, Se) spinels for optoelectronic and energy harvesting applications","authors":"Ashiq Ramzan, Mudasir Younis Sofi, Mohd Shahid Khan, Javid Ali, M. Ajmal Khan","doi":"10.1140/epjb/s10051-025-00937-y","DOIUrl":"10.1140/epjb/s10051-025-00937-y","url":null,"abstract":"<div><p>Magnesium-based chalcogenides have emerged as promising candidates for optoelectronic and energy harvesting devices. In this study, we investigate the structural, electronic, optical, elastic, and thermoelectric properties of MgAl<sub>2</sub>X<sub>4</sub> (X = S, Se) using density functional theory (DFT). Structural optimization confirms thermodynamic stability with negative formation energies of − 0.994 eV (MgAl<sub>2</sub>S<sub>4</sub>) and − 1.359 eV (MgAl<sub>2</sub>Se<sub>4</sub>). The modified Becke-Johnson (mBJ) potential reveals direct band gaps of 2.8 eV for MgAl<sub>2</sub>S<sub>4</sub> and 1.9 eV for MgAl<sub>2</sub>Se<sub>4</sub>, suitable for optoelectronic applications. Optical analysis shows strong absorption in the visible–UV range, with absorption coefficients of <span>(sim)</span> 50 × 10<sup>4</sup> cm⁻<sup>1</sup> for MgAl<sub>2</sub>S<sub>4</sub> and <span>(sim)</span> 60 × 10<sup>4</sup> cm⁻<sup>1</sup> for MgAl<sub>2</sub>Se<sub>4</sub>. Elastic constants confirm mechanical stability and ductile behavior, while thermoelectric analysis reveals high Seebeck coefficients and figure of merit (zT) values of 0.96 and 0.95 for MgAl<sub>2</sub>S<sub>4</sub> and MgAl<sub>2</sub>Se<sub>4</sub>, respectively. The combination of favorable electronic, optical, and thermoelectric properties underscores the potential of MgAl<sub>2</sub>X<sub>4</sub> chalcogenides for advanced applications in photovoltaics and thermoelectric devices.</p><h3>Graphical abstract</h3><p>Figure (a) shows the absorption coefficient, while Figure (b) presents the figure of merit at 300 K, highlighting the suitability of the materials for optoelectronic and thermoelectric applications. </p>\u0000<div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":787,"journal":{"name":"The European Physical Journal B","volume":"98 5","pages":""},"PeriodicalIF":1.6,"publicationDate":"2025-05-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144125658","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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}

引用次数: 0

Quantum Fisher information density in infinite-size extended Ising chains 无限大扩展Ising链中的量子Fisher信息密度

IF 1.6 4区物理与天体物理

The European Physical Journal B Pub Date : 2025-05-23 DOI: 10.1140/epjb/s10051-025-00946-x

Shu Qu, Hong-Guang Cheng, Chen Wu, Bin Guo, Zhao-Yu Sun

{"title":"Quantum Fisher information density in infinite-size extended Ising chains","authors":"Shu Qu, Hong-Guang Cheng, Chen Wu, Bin Guo, Zhao-Yu Sun","doi":"10.1140/epjb/s10051-025-00946-x","DOIUrl":"10.1140/epjb/s10051-025-00946-x","url":null,"abstract":"<p>In this paper, we investigate quantum Fisher information (QFI) density in the ground state of the one-dimensional infinite-size extended quantum Ising model, a system known for its rich phase diagram and topological quantum phase transitions. Notably, the QFI density itself displays clear signatures at many critical points, making it a better indicator compared to previously used two-qubit QFI (which depends upon a two-qubit reduced density matrix). This advantage stems from the QFI density’s reliance on all two-qubit reduced density matrices in the ground state, rather than just one. Beyond critical phenomena, we explore the connection between QFI density and quantum entanglement. We identify wide regions where metrologically useful entanglement is present and consequently quantum-enhanced metrology is expected. Furthermore, the QFI density shows peaks in the vicinity of some critical points, suggesting the possibility of criticality-enhanced metrology. Overall, our results demonstrate that the QFI density serves as a powerful tool for characterizing both quantum criticality and metrologically useful entanglement in the extended quantum Ising model, offering valuable insights for both theoretical understanding and future experimental investigations in quantum metrology and quantum criticality.</p>","PeriodicalId":787,"journal":{"name":"The European Physical Journal B","volume":"98 5","pages":""},"PeriodicalIF":1.6,"publicationDate":"2025-05-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144125621","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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}

引用次数: 0

Structural, elastic, optoelectronic, thermodynamic and thermoelectric properties of the new halide double perovskite Cs2CaGeI6: first-principles study 新型卤化物双钙钛矿Cs2CaGeI6的结构、弹性、光电、热力学和热电性质：第一性原理研究

IF 1.6 4区物理与天体物理

The European Physical Journal B Pub Date : 2025-05-23 DOI: 10.1140/epjb/s10051-025-00949-8

Chikh Ali Hadji, Amina Arrar, Mohamed Ghaleb, Otmane Zerrouki, Hadjer Bendjilali

{"title":"Structural, elastic, optoelectronic, thermodynamic and thermoelectric properties of the new halide double perovskite Cs2CaGeI6: first-principles study","authors":"Chikh Ali Hadji, Amina Arrar, Mohamed Ghaleb, Otmane Zerrouki, Hadjer Bendjilali","doi":"10.1140/epjb/s10051-025-00949-8","DOIUrl":"10.1140/epjb/s10051-025-00949-8","url":null,"abstract":"<div><p>The structural, elastic, optical, thermodynamic, and thermoelectri<b>c</b> properties of Cs<sub>2</sub>CaGeI<sub>6</sub> double perovskite were investigated using density functional theory simulations. The calculations show that the material is elastically stable and isotropic. Furthermore, with an endurance factor of <i>t</i> = 0.89 and an energy of formation of <i>Ef</i> = − 0.97 Ev. Our calculations demonstrate the high structural stability of perovskite materials. GGA-PBE and TB-mBJ are used to approximate the electrical properties while introducing spin–orbit coupling. The compound's high absorption and indirect bandgap semiconductor capabilities make it a prospective rival for solar cells. The thermal characteristics for temperatures between 50 and 1000 K were investigated using the BoltzTraP algorithm. Furthermore, we used the Gibbs software to compute the thermodynamic characteristics of Cs<sub>2</sub>CaGeI<sub>6</sub> double halide perovskite. Additionally, the studied Cs<sub>2</sub>CaGeI<sub>6</sub> combination has a good figure of merit at room temperature, suggesting that its thermodynamic and thermoelectric properties offer potential for use in thermoelectric technology.</p><h3>Graphical Abstract</h3><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":787,"journal":{"name":"The European Physical Journal B","volume":"98 5","pages":""},"PeriodicalIF":1.6,"publicationDate":"2025-05-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144125620","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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}

引用次数: 0

First-principles calculations of superconductivity in Li-decorated WSH monolayer 锂修饰水分子单层超导性的第一性原理计算

IF 1.6 4区物理与天体物理

The European Physical Journal B Pub Date : 2025-05-20 DOI: 10.1140/epjb/s10051-025-00951-0

Jia-Ying Chen, Si-Lie Fu, Chun-An Wang, Yu-Lin Chen, Jing-Hua Wang, Rong-Rong Deng, Ya-Peng Xie, Xue-Lian Gao, Xian-Qiu Wu

{"title":"First-principles calculations of superconductivity in Li-decorated WSH monolayer","authors":"Jia-Ying Chen, Si-Lie Fu, Chun-An Wang, Yu-Lin Chen, Jing-Hua Wang, Rong-Rong Deng, Ya-Peng Xie, Xue-Lian Gao, Xian-Qiu Wu","doi":"10.1140/epjb/s10051-025-00951-0","DOIUrl":"10.1140/epjb/s10051-025-00951-0","url":null,"abstract":"<div><p>Within first-principles calculations, we construct an Li-decorated WSH monolayer (Li–WSH). Then we investigate the electronic structure, phonon dispersion, electron–phonon coupling (EPC) and superconducting property. The results show that Li atoms play a significant role in electronic structure and EPC. The introduction of Li atoms changes the electronic structure, leading to more bands crossing the Fermi level and making the bands flatter, which results in a large density of states near the Fermi level. Additionally, the strong EPC is dominant in the vibrational modes of the W and Li atoms. Due to the small mass of Li atoms, it is easy to vibrationally hybridize with other atoms, which further enhances the EPC. Based on Migdal–Eliashberg theory, the calculations predict that the critical temperature (<i>T</i><sub>c</sub>) of Li–WSH is 37.5 K with the EPC constant <i>λ</i> 2.23. The <i>T</i><sub>c</sub> is higher than that of reported WS<sub>2</sub>-based materials. Our research provides new guidance for two-dimensional superconductivity and is also beneficial to further theoretical study of superconductivity in WS<sub>2</sub>-based materials.</p><h3>Graphical abstract</h3>\u0000<div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":787,"journal":{"name":"The European Physical Journal B","volume":"98 5","pages":""},"PeriodicalIF":1.6,"publicationDate":"2025-05-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144100395","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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}

引用次数: 0

Antibacterial and photocatalytic activity of Tb-doped ZnO nanoparticles: effect of doping concentration tb掺杂ZnO纳米颗粒的抗菌和光催化活性：掺杂浓度的影响

IF 1.6 4区物理与天体物理

The European Physical Journal B Pub Date : 2025-05-15 DOI: 10.1140/epjb/s10051-025-00943-0

A. Jasmine, P. Baskaran, L. Bruno Chandrasekar, M. Karunakaran, P. Krishnaveni, T. Balakrishnan, Lalitha Gnanasekaran, J. Thirumalai, P. Shunmuga Sundaram, Salim Manoharadas, Sonaimuthu Mohandoss, Subamanian Palanisamy

{"title":"Antibacterial and photocatalytic activity of Tb-doped ZnO nanoparticles: effect of doping concentration","authors":"A. Jasmine, P. Baskaran, L. Bruno Chandrasekar, M. Karunakaran, P. Krishnaveni, T. Balakrishnan, Lalitha Gnanasekaran, J. Thirumalai, P. Shunmuga Sundaram, Salim Manoharadas, Sonaimuthu Mohandoss, Subamanian Palanisamy","doi":"10.1140/epjb/s10051-025-00943-0","DOIUrl":"10.1140/epjb/s10051-025-00943-0","url":null,"abstract":"<div><p>Tb-doped ZnO nanoparticles (Tb<sub>x</sub>Zn<sub>1-x</sub>O) were prepared by chemical precipitation method with different doping concentrations of Tb. The crystallite size and other related structural properties are examined. Young’s modulus, electron jump length and crystal lattice distortion degree are discussed as a function of doping concentration. The band gap reduces from 3.24 to 2.82 eV as the doping concentration of Tb increases from 0%. The prepared nanoparticles are hole-rich materials. The quenching is observed in the photoluminescence spectrum due to doping. Kirby–Bauer method is employed to investigate the anti-bacterial activity against Gram-positive and Gram-negative bacteria that cause septicemia. The degradation of methylene blue using the prepared nanoparticles as a catalyst is examined using both UV and Visible radiation. The effective degradation is observed in this work and the enhanced photocatalytic activity is observed at high doping concentration of Tb. The maximum degradation efficiency of 98.60% is observed against methylene blue when the dye is irradiated by UV radiation for the time period of 120 min. But the same is 74.89% by visible light.</p><h3>Graphical abstract</h3><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":787,"journal":{"name":"The European Physical Journal B","volume":"98 5","pages":""},"PeriodicalIF":1.6,"publicationDate":"2025-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144073692","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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}

引用次数: 0

Weakly nonlinear analyses on double-diffusive convection of Casson fluid in a porous medium with an internal heat and gravity modulation 具有内热和重力调制的多孔介质中卡森流体双扩散对流的弱非线性分析

IF 1.6 4区物理与天体物理

The European Physical Journal B Pub Date : 2025-05-14 DOI: 10.1140/epjb/s10051-025-00947-w

L. Venkat Reddy, Ravi Ragoju, Suman Shekhar, Dhananjay Yadav

{"title":"Weakly nonlinear analyses on double-diffusive convection of Casson fluid in a porous medium with an internal heat and gravity modulation","authors":"L. Venkat Reddy, Ravi Ragoju, Suman Shekhar, Dhananjay Yadav","doi":"10.1140/epjb/s10051-025-00947-w","DOIUrl":"10.1140/epjb/s10051-025-00947-w","url":null,"abstract":"<p>The influence of internal heat and gravity modulation on the onset of double-diffusive convection of Casson fluid using weakly nonlinear analysis is examined. Porous material generates its self heat under different types of situations. Casson fluids have found widespread use in food industries. Chocolate production, for instance, relies on controlling rheological behavior, influenced by ingredients and processing techniques. Casson fluid model is also applied in medical research to mimic human blood rheology. Non-newtonian fluid and their viscosity changes with applied stresses. These fluids demonstrate complex flow behavior in food processing. But so far, the influence of internal heat and gravity modulation on casson fluid is not discussed. Power series expansion method is used where disturbances are expressed as power series. Ginzburg–Landau amplitude equation was derived to quantify heat transfer and mass transport using Nusselt and Sherwood number, respectively. Our investigation revealed that increasing values of Darcy number, Casson parameter, and solutal Rayleigh number enhances the Nusselt number and Sherwood number, indicating improved heat and mass transfer. Furthermore, decreasing Nusselt number and Sherwood number by increasing the modulation frequency produces less heat and mass transport. Conversely, increasing the modulation amplitude increases the Nusselt number and Sherwood number.</p>","PeriodicalId":787,"journal":{"name":"The European Physical Journal B","volume":"98 5","pages":""},"PeriodicalIF":1.6,"publicationDate":"2025-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143949561","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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}

引用次数: 0