{"title":"Coupled effect of pressure corrections and heat-mass transfer on Rayleigh-Taylor instability in Casson fluid layer","authors":"Atul Kumar Shukla , Mukesh Kumar Awasthi , Dhananjay Yadav , U.S. Mahabaleshwar","doi":"10.1016/j.cjph.2025.03.038","DOIUrl":"10.1016/j.cjph.2025.03.038","url":null,"abstract":"<div><div>This study explores the novel stability characteristics of the interface in a system composed of a viscous-Casson fluid, focusing on the coupled effects of heat and mass transfer. Extending the work of Awasthi et al. (Physics Fluids, 36 (2024) 102132), this investigation incorporates tangential viscous stresses into the interfacial dynamic condition, marking a departure from traditional potential flow theories. The model features a Casson fluid as the upper layer and a viscous fluid as the lower layer, with the analysis assuming no-slip conditions at rigid boundaries while the normal velocity is zero at these boundaries. A second-order polynomial equation is derived to characterize the growth rate, solved numerically using the Newton-Raphson method. Key findings demonstrate that heat and mass transfer enhance interface stability, with increased heat transport mitigating the destabilizing effects of the Atwood number. This theoretical advancement provides deeper insights into the dynamics of interfacial instability in complex fluid systems.</div></div>","PeriodicalId":10340,"journal":{"name":"Chinese Journal of Physics","volume":"95 ","pages":"Pages 962-977"},"PeriodicalIF":4.6,"publicationDate":"2025-04-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143869369","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":"An innovative solution to the Mathieu-Van der Pol-Helmholtz-Duffing equation for the stability of superposed electrified Rivlin-Ericksen fluids","authors":"Yusry O. El-Dib , Haifa A. Alyousef","doi":"10.1016/j.cjph.2025.03.044","DOIUrl":"10.1016/j.cjph.2025.03.044","url":null,"abstract":"<div><div>This paper presents a novel way to <strong>solve</strong> the Mathieu-Van der Pol-Helmholtz-Duffing equation to investigate the stability of superposed electrified Rivlin-Ericksen fluids. It focuses on the dynamics of surface waves propagating between two Rivlin-Ericksen elastic-viscous fluids under a vertical periodic electric field and relative streaming flow, revealing information about fluid interface stability and interactions. The analysis illustrates the delicate balance of forces that govern the system's behavior by combining surface tension, gravitational forces, and viscoelastic effects. Given the complexities of streaming flow, a mathematical simplification is used to increase analytical tractability. The boundary conditions account for viscoelasticity's effect, which greatly adds to the system's complexity. To assist analysis, the approximate equations of motion are first solved while ignoring viscoelastic effects, allowing for a preliminary understanding of the fundamental interactions between the periodic electric field, surface tension, and gravity. Once this baseline is created, viscoelastic effects are applied to capture the entire dynamics. The resulting nonlinear equation governing interfacial displacement, which is constructed as a nonlinear Mathieu-type equation and then simplified into a linearized form, allows for a detailed examination of stability and reveals areas of stability and instability. Numerical results show that characteristics such as the dielectric constant ratio, viscosity ratio, and viscoelasticity ratio all affect stability differently. Notably, the viscoelasticity coefficient causes destabilization in the nonlinear regime, emphasizing the complex interplay of forces in elastic-viscous fluid systems. This work contributes to a better understanding of complicated fluid interfaces, particularly under periodic electric excitation and viscoelastic effects.</div></div>","PeriodicalId":10340,"journal":{"name":"Chinese Journal of Physics","volume":"95 ","pages":"Pages 902-918"},"PeriodicalIF":4.6,"publicationDate":"2025-03-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143864341","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}
Asma Alanazy , Galal M. Moatimid , Yasmeen M. Mohamed
{"title":"An innovative methodology of inspecting nonlinear stability of a cylindrical interface separating two magnetic liquids","authors":"Asma Alanazy , Galal M. Moatimid , Yasmeen M. Mohamed","doi":"10.1016/j.cjph.2025.03.045","DOIUrl":"10.1016/j.cjph.2025.03.045","url":null,"abstract":"<div><div>Studying the nonlinear stability of a cylindrical interface between two magnetic liquids is novel due to its complex interaction of Magnetohydrodynamic (MHD) effects, interfacial deformations, and thermodynamic gradients, relevant to industrial applications and astrophysical phenomena. Consequently, this study examines the nonlinear stability of a cylindrical interface between two liquids in MHD, focusing on applications like MHD technologies, industrial processes, and geophysical inflows. The inner region contains a Power-law fluid (PLF), meanwhile, the outer one is filled by an Eyring-Powell fluid (EPF), both of them are immersed in a permeable medium under a uniform magnetic field (MF). Surface tension (ST), mass, and heat transfer (MHT) are analyzed employing Hsieh's streamlined formulation. To summarize the mathematical manipulation, the investigation utilizes the viscous potential theory (VPT), which simplifies calculations by regarding normal stress equilibrium, however ignoring shear stresses. Through quasi-static approximations of Maxwell's equations, a boundary-value problem is derived. Nonlinear boundary conditions (BCs) are established by linearizing the movement equations. A nonlinear ordinary differential equation (ODE) is converted into a linear one using He's frequency formula (HFF), which supports a novel procedure named the non-perturbative approach (NPA). Dimensionless quantities simplify the framework, revealing the impact of MFs, viscoelastic parameters, and Lorentz forces on interfacial performance. It is found that the Weber numbers, the linear factor of MHT as well as Darcy number have stabilized influences. The characteristic nonlinear ODE possesses real coefficients in the absence of the Weber number. The PolarPlot graphics demonstrate stability criteria, which remain reliable in both real and complex coefficients, except for variations in the transitional curve.</div></div>","PeriodicalId":10340,"journal":{"name":"Chinese Journal of Physics","volume":"95 ","pages":"Pages 1222-1249"},"PeriodicalIF":4.6,"publicationDate":"2025-03-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143899388","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}
Zelong He , Muhammad Aslam , Seyede Zahra Naeimi , M. Shahid , Sergey Nikiforov , Muhammad Khalid Hussain , Alma Dauletbekova , Hussain Ahmad , Anees Ur Rehman
{"title":"Influence of Majorana bound states on conductance characteristics in a T-shaped quantum dot molecule","authors":"Zelong He , Muhammad Aslam , Seyede Zahra Naeimi , M. Shahid , Sergey Nikiforov , Muhammad Khalid Hussain , Alma Dauletbekova , Hussain Ahmad , Anees Ur Rehman","doi":"10.1016/j.cjph.2025.03.042","DOIUrl":"10.1016/j.cjph.2025.03.042","url":null,"abstract":"<div><div>Quantum dots (QDs) in contact with normal-metal and superconducting leads exhibit remarkable electron transmission features. The coupling of Majorana bound states (MBSs) has made them a promising platform for the development of mesoscopic structures. To elaborate on the highly efficient mesoscopic mode, the Andreev conductance in a T-shaped QD molecule coupled with MBSs is theoretically addressed. As the QD-MBS coupling strength λ is focused with respect to the QD energy level <span><math><mrow><msub><mrow><mi>ε</mi></mrow><mn>1</mn></msub><mo>=</mo><msub><mrow><mi>ε</mi></mrow><mn>2</mn></msub><mo>=</mo><mn>0</mn></mrow></math></span> in a T-shaped QD molecule, the conductance peak at <span><math><mrow><msub><mrow><mi>ε</mi></mrow><mi>F</mi></msub><mo>=</mo><mn>0</mn></mrow></math></span> rises up to 0.5<span><math><mrow><msup><mrow><mi>e</mi></mrow><mn>2</mn></msup><mo>/</mo><mi>h</mi></mrow></math></span>. At <span><math><mrow><msub><mrow><mi>ε</mi></mrow><mn>1</mn></msub><mo>=</mo><msub><mrow><mi>ε</mi></mrow><mn>2</mn></msub><mo>=</mo><mn>0</mn></mrow></math></span>, the bonding and antibonding states are captured in the conductance lines as suitable QD-MBS or MBS-MBS coupling <span><math><msub><mrow><mi>ε</mi></mrow><mi>M</mi></msub></math></span> survives. Furthermore, for the asymmetric QD-lead coupling case, changing <span><math><msub><mrow><mi>ε</mi></mrow><mi>M</mi></msub></math></span> not only induces a transition in zero bias peaks but also suppresses the conductance curve in a low critical bias regime. The present findings can deepen the understanding of the influence of MBSs on electron transport features, highlighting the potential of T-shaped QD molecules coupled with MBSs for additional development and applications in mini-sized devices.</div></div>","PeriodicalId":10340,"journal":{"name":"Chinese Journal of Physics","volume":"95 ","pages":"Pages 627-637"},"PeriodicalIF":4.6,"publicationDate":"2025-03-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143760380","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":"Quantifying the environment's temperature effect on gene expression: Lyapunov exponent and multifractal dimension approach","authors":"F. Nemati, S. Behnia","doi":"10.1016/j.cjph.2025.02.041","DOIUrl":"10.1016/j.cjph.2025.02.041","url":null,"abstract":"<div><div>Our understanding of the protein synthesis mechanism has influenced our ability to provide microorganisms with the conditions for adapting to future environmental change. In this study, theoretical modeling by considering the environment temperature and the delay in response of mRNA level to variation of protein and mRNA degradation rate has been proposed. The influence of environment temperature and time delay in gene regulation results in oscillatory behavior at the mRNA level. An elevation in the mRNA degradation rate proficiently governs the protein synthesis pathway, while an increment in the protein degradation rate yields a limiting effect on the transcriptional phase. Transcription steps can be controlled, by controlling the length of time delay. The calculation of Lyapunov exponents across a broad spectrum of values reveals the inherent chaos within the dynamics of protein synthesis.</div></div>","PeriodicalId":10340,"journal":{"name":"Chinese Journal of Physics","volume":"95 ","pages":"Pages 358-370"},"PeriodicalIF":4.6,"publicationDate":"2025-03-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143704109","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}
Xiyan Tian , Bingbing Yang , Xin Na , Shuaishuai Cheng , Liankang Ba , Yi Yuan
{"title":"An improved cuckoo search algorithm for inverse heat conduction and heat convection","authors":"Xiyan Tian , Bingbing Yang , Xin Na , Shuaishuai Cheng , Liankang Ba , Yi Yuan","doi":"10.1016/j.cjph.2025.03.039","DOIUrl":"10.1016/j.cjph.2025.03.039","url":null,"abstract":"<div><div>A competitive improved mode of cuckoo search algorithm (CSA) named step enhanced cuckoo search algorithm (SECSA) in terms of enhanced search step length is proposed to solve inverse heat transfer problems (IHTPs) in the present research. In SECSA, a traction factor is introduced and hence the global and local search is balanced. Further, an adjustment strategy is suggested, to adaptive step size scaling factor and adaptive discovery probability. It is optimized to constrain the randomness of the original algorithm, strengthen the information exchange between populations, and improve computational efficiency and robustness. Therefore the performance of the original CSA is improved. SECSA along with collocation spectral method (CSM) is utilized to solve conduction and convective inverse heat transfer problem (IHTP) of reconstructing boundary conditions, optimizing thermophysical parameters as well as identifying the heat flux, in both cylindrical coordinate and in Cartesian coordinate. For the irregular regions, body fitted coordinate transformation technique is adopted to transform the irregular regions into the regular ones, based on the theory of adaptive coordinate transformation and the regularization of complex variable functions. Results are analyzed both qualitatively and quantitatively in the considerations of population quantity, expansion degree and number of measuring points. The statistical results show the potential performance of improved CSs in IHTPs. The convergence speed, calculation accuracy and universality are significantly improved.</div></div>","PeriodicalId":10340,"journal":{"name":"Chinese Journal of Physics","volume":"95 ","pages":"Pages 765-789"},"PeriodicalIF":4.6,"publicationDate":"2025-03-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143817577","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}
Muhammad Idrees , Fazal Badshah , Rashid Ali , Khurram Shehzad , Zareen A. Khan
{"title":"Manipulation and control of rotary photon drag in a chiral quantum dot molecular system","authors":"Muhammad Idrees , Fazal Badshah , Rashid Ali , Khurram Shehzad , Zareen A. Khan","doi":"10.1016/j.cjph.2025.03.026","DOIUrl":"10.1016/j.cjph.2025.03.026","url":null,"abstract":"<div><div>This study investigates the manipulation and control of rotary photon drag in a chiral quantum dot molecular system. The system comprises two laterally coupled (In,Ga)As/GaAs quantum dots with distinct band configurations. The results demonstrate the ability to manipulate and control the rotary photon drag of both left-circularly polarized (LCP) and right-circularly polarized (RCP) beams, due to strong chirality induced by electromagnetic fields. Notably, considerable enhancements in rotary photon drag are observed, with values ranging from <span><math><mrow><mo>±</mo><mn>20</mn></mrow></math></span> rad to <span><math><mrow><mo>±</mo><mn>40</mn></mrow></math></span> rad for RCP and LCP beams, respectively. Additionally, the study highlights strong manipulation of the group index, divergence angle, and refractive index in these chiral quantum dot molecular systems. The group index is enhanced from <span><math><mrow><mo>±</mo><mn>4</mn><mo>×</mo><mn>1</mn><msup><mrow><mn>0</mn></mrow><mrow><mn>11</mn></mrow></msup></mrow></math></span> to <span><math><mrow><mo>±</mo><mn>6</mn><mo>×</mo><mn>1</mn><msup><mrow><mn>0</mn></mrow><mrow><mn>11</mn></mrow></msup></mrow></math></span> for both RCP and LCP beams. Furthermore, a maximum divergence angle of <span><math><mrow><mn>3</mn><mo>.</mo><mn>4</mn></mrow></math></span> rad is observed between the RCP and LCP beams, along with enhanced refractive indices for both polarization states. The enhanced rotary photon drag facilitates precision optical manipulation, chiral sensing, advanced optical communication, and quantum information processing. This work also shows potential for enhancing light-matter interactions in photonic devices, advancing next-generation photonic circuits and sensors.</div></div>","PeriodicalId":10340,"journal":{"name":"Chinese Journal of Physics","volume":"95 ","pages":"Pages 866-876"},"PeriodicalIF":4.6,"publicationDate":"2025-03-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143852058","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":"Heterogeneous and homogeneous extreme multistability in a dual-memristor FHN circuit considering magnetic and electric field effects","authors":"Yongjie Zhu , Rui Liang , Guangzhe Zhao , Xiaoyun Wang , Yunzhen Zhang","doi":"10.1016/j.cjph.2025.03.033","DOIUrl":"10.1016/j.cjph.2025.03.033","url":null,"abstract":"<div><div>The memristor-based neuron circuit considering the magnetic field effect is prone to heterogeneous extreme multistability (EM). However, the electric field effect represented by a charge-controlled memristor can also act on the neuron circuit, causing unusual nonlinear phenomena. To reveal the dynamical effects of magnetic and electric fields on biological neurons, this study proposes a novel non-autonomous dual-memristor FHN circuit considering magnetic and electric field effects. It is achieved by introducing a charge-controlled memristor representing the electric field effect into a single-memristor FHN circuit that considers only the magnetic field effect. The dual-memristor FHN circuit not only emerges the heterogeneous EM dependent on the initial states of the two memristors, but also presents the homogeneous EM whose dynamics can be boosted by the initial state offset of the charge-controlled memristor. The initial state-related bifurcation behaviors are numerically revealed, and the mechanism of homogeneous EM is theoretically interpreted. Further, a flux-charge model dependent on initial state parameters is established by feat of the incremental integral reconstruction, and then the initial state parameters-related stability and bifurcation behaviors are elaborated. Finally, digital implementations based on FPGA platform are provided to confirm the numerical simulations.</div></div>","PeriodicalId":10340,"journal":{"name":"Chinese Journal of Physics","volume":"95 ","pages":"Pages 714-730"},"PeriodicalIF":4.6,"publicationDate":"2025-03-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143791628","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}
Xiangfeng Qi , Enling Li , Yang Shen , Ke Qin , Xiaoyu Zhao , Deming Ma , Zhen Cui
{"title":"Study on the photoelectric properties of series heterojunctions based on g-GaN","authors":"Xiangfeng Qi , Enling Li , Yang Shen , Ke Qin , Xiaoyu Zhao , Deming Ma , Zhen Cui","doi":"10.1016/j.cjph.2025.03.031","DOIUrl":"10.1016/j.cjph.2025.03.031","url":null,"abstract":"<div><div>The series heterojunctions such as the GeC/GaN, SiC/GaN, and ZnO/GaN heterojunctions, MoS<sub>2</sub>/GaN, MoSe<sub>2</sub>/GaN, MoSSe/GaN, WS<sub>2</sub>/GaN, WSe<sub>2</sub>/GaN, and WSSe/GaN heterojunctions are designed and systematically researched based on first-principles calculations, and the electronic properties and photocurrent characteristics are studied in this paper. The results indicate that the band gaps of the heterojunctions are larger than those of the individual monolayers, except for the SiC/GaN heterojunction. The results of Crystal Orbital Hamilton Population (COHP) and Integrated COHP reveal the bonding states in each heterojunction, the Ga-N bonds in the atomic structures play a dominant role in stabilizing the heterojunctions. The final photodetector simulation results show that the photocurrent peaks of the MoS<sub>2</sub>/GaN, MoSSe/GaN and WSe<sub>2</sub>/GaN heterojunctions exceed 0.1<span><math><msubsup><mi>a</mi><mn>0</mn><mn>2</mn></msubsup></math></span>/photon. Notably, the MoSSe/GaN heterojunction exhibits a high Extinction Ratio (8.202) and a remarkable photocurrent peak (2.610<span><math><msubsup><mi>a</mi><mn>0</mn><mn>2</mn></msubsup></math></span>/photon), indicating that the MoSSe/GaN heterojunction is a promising candidate for novel photodetector.</div></div>","PeriodicalId":10340,"journal":{"name":"Chinese Journal of Physics","volume":"95 ","pages":"Pages 890-901"},"PeriodicalIF":4.6,"publicationDate":"2025-03-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143864231","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}
Zhaoxue Huang , Kaijun Wu , Meijuan He , Jiawei Li
{"title":"Effects of electromagnetic induction on vibrational resonance in fast spiking Izhikevich neuronal systems","authors":"Zhaoxue Huang , Kaijun Wu , Meijuan He , Jiawei Li","doi":"10.1016/j.cjph.2025.03.019","DOIUrl":"10.1016/j.cjph.2025.03.019","url":null,"abstract":"<div><div>In this paper, the vibrational resonance (VR) properties of single and bidirectionally coupled fast spiking Izhikevich neuron systems under varying electromagnetic induction (EMI) conditions are systematically investigated using an improved Izhikevich neuron model. It is found that in the absence of EMI, multiple vibrational resonances (MVR) phenomena can be observed in the single neuron model. However, the introduction of EMI significantly weakens the VR effect, with this attenuation being more pronounced in the single neuron model. In the bidirectionally coupled neuron system, MVR phenomena disappear, and the coupling strength exerts a modulatory effect on vibrational resonance. Additionally, the study explored the effects of EMI parameters and coupling strength on Fourier coefficients. These findings suggest that EMI can diminish the signal detection capabilities of fast spiking neurons, with implications for understanding neural dynamics and advancing neuromodulation strategies for the management of neurological disorders.</div></div>","PeriodicalId":10340,"journal":{"name":"Chinese Journal of Physics","volume":"95 ","pages":"Pages 585-599"},"PeriodicalIF":4.6,"publicationDate":"2025-03-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143761103","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}