Chinese Journal of Physics最新文献_第4页

Effect of thin film thickness of ferrofluid on inclined bioconvective flow 铁流体薄膜厚度对倾斜生物对流的影响

IF 4.6 2区物理与天体物理

Chinese Journal of Physics Pub Date : 2024-10-16 DOI: 10.1016/j.cjph.2024.10.019

Anupam Bhandari

{"title":"Effect of thin film thickness of ferrofluid on inclined bioconvective flow","authors":"Anupam Bhandari","doi":"10.1016/j.cjph.2024.10.019","DOIUrl":"10.1016/j.cjph.2024.10.019","url":null,"abstract":"<div><div>This research examines the effect of variable thin film thickness on the bioconvective ferrofluid flow through a rotating sloped surface when a magnetic field (dipole) is present. Similarity transformation is used to standardize the current model's governing equations. By using a finite element method, the normalized nonlinear differential equations are numerically solved. Variable thickness of ferrofluid thin film and bioconvective parameters (bioconvective Lewis number, bioconvective Peclet number, and micro-organism concentration difference) yield the following results: velocity profiles (radial, tangential, and axial), gravity flow (drainage velocity and induced velocity), temperature profile, concentration profile and microorganism profile. In addition, this investigation examines the density of moving microorganisms as well as local heat and mass transport. The temperature, concentration, radial, axial, drainage, induced, and motile microbe velocity are all improved with increasing film thickness. Variable thickness increases local heat transfer whereas increasing Brownian motion and thermophoresis parameters decreases it. This study could be helpful for self-sterilizing applications and biomedical engineering.</div></div>","PeriodicalId":10340,"journal":{"name":"Chinese Journal of Physics","volume":"92 ","pages":"Pages 959-974"},"PeriodicalIF":4.6,"publicationDate":"2024-10-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142537675","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}

引用次数: 0

Low-pressure superconductivity of Th-B-H ternary compounds: An insightful study of stable and metastable phases Th-B-H 三元化合物的低压超导性：对稳定相和蜕变相的深入研究

IF 4.6 2区物理与天体物理

Chinese Journal of Physics Pub Date : 2024-10-16 DOI: 10.1016/j.cjph.2024.10.021

Tian-Tian Liu, Xin Li, Guo-Yong Shi, Juan Hua, Yue-Hua Su, Chao Zhang, Hong Jiang

{"title":"Low-pressure superconductivity of Th-B-H ternary compounds: An insightful study of stable and metastable phases","authors":"Tian-Tian Liu, Xin Li, Guo-Yong Shi, Juan Hua, Yue-Hua Su, Chao Zhang, Hong Jiang","doi":"10.1016/j.cjph.2024.10.021","DOIUrl":"10.1016/j.cjph.2024.10.021","url":null,"abstract":"<div><div>The low-enthalpy structures of Th-B-H ternary compounds below 50 GPa are investigated by using an efficient framework that combines high-throughput screening, genetic algorithms, and first-principles calculations. Four thermodynamically stable hydrides (Th<sub>2</sub>BH<sub>11</sub>, Th<sub>2</sub>BH<sub>10</sub>, ThB<sub>2</sub>H<sub>10</sub>, and ThBH) and seven thermodynamically metastable hydrides (ThBH<sub>2</sub>, ThBH<sub>3</sub>, ThBH<sub>4</sub>, ThBH<sub>5</sub>, ThBH<sub>7</sub>, ThB<sub>2</sub>H<sub>4</sub>, and ThB<sub>3</sub>H<sub>3</sub>) are revealed. There are no stable thorium boron hydrides at ambient pressure. <em>R</em>3<em>m</em>-ThB<sub>2</sub>H<sub>10</sub> and <em>R</em>3<em>m</em>-Th<sub>2</sub>BH<sub>11</sub> are indirect bandgap semiconductors, while <em>R</em>3<em>m</em>-Th<sub>2</sub>BH<sub>10</sub> and <em>P</em>6/<em>mmm</em>-ThBH show metallic nature. The relatively low <em>λ</em> values of <em>R</em>3<em>m</em>-Th<sub>2</sub>BH<sub>10</sub> and <em>P</em>6/<em>mmm</em>-ThBH result in their <em>T</em><sub>c</sub> around 5.8 K and 0.1 K at 20 GPa, respectively. Two metastable phases, <span><math><mrow><mi>F</mi><mrow><mover><mn>4</mn><mo>¯</mo></mover><mn>3</mn></mrow><mi>m</mi></mrow></math></span>-ThBH<sub>5</sub> and <em>P</em>6<sub>3</sub>/<em>mmc</em>-ThBH<sub>7</sub>, exhibit excellent superconducting properties at low pressures. The values of <em>T</em><sub>c</sub> of <span><math><mrow><mi>F</mi><mrow><mover><mn>4</mn><mo>¯</mo></mover><mn>3</mn></mrow><mi>m</mi></mrow></math></span>-ThBH<sub>5</sub> and <em>P</em>6<sub>3</sub>/<em>mmc</em>-ThBH<sub>7</sub> reach 46.9 K at 20 GPa and 40.0 K at 50 GPa, respectively. Our findings offer valuable insights for discovering and designing superconducting rare earth hydrides under low and even ambient pressures.</div></div>","PeriodicalId":10340,"journal":{"name":"Chinese Journal of Physics","volume":"92 ","pages":"Pages 936-945"},"PeriodicalIF":4.6,"publicationDate":"2024-10-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142525978","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}

引用次数: 0

Microgravity influenced unsteady dispersion during magnetic drug targeting in an inclined tumor-stenosed microvessel with slip effects 在具有滑移效应的倾斜肿瘤狭窄微血管中进行磁性药物靶向时受微重力影响的不稳定弥散

IF 4.6 2区物理与天体物理

Chinese Journal of Physics Pub Date : 2024-10-15 DOI: 10.1016/j.cjph.2024.10.010

Lazaro Revocatus Mashiku , Sachin Shaw

{"title":"Microgravity influenced unsteady dispersion during magnetic drug targeting in an inclined tumor-stenosed microvessel with slip effects","authors":"Lazaro Revocatus Mashiku , Sachin Shaw","doi":"10.1016/j.cjph.2024.10.010","DOIUrl":"10.1016/j.cjph.2024.10.010","url":null,"abstract":"<div><h3>Introduction:</h3><div>Recent cancer research into microgravity or altered gravity environments has gained attention for its potential to disrupt cancer cell growth and proliferation while reducing the risk of chemoresistance—a major challenge in conventional chemotherapy.</div></div><div><h3>Aim of the study:</h3><div>Motivated by the emerging applications of microgravity in cancer research, the current study aimed to mathematically investigate the potential of the microgravity-enhanced environment in combination with magnetic drug targeting (MDT) to optimize drug delivery and dispersion.</div></div><div><h3>Methodology:</h3><div>The particle velocity, including microgravity’s influence in the presence of an external applied magnetic field alongside fluid pressure, was computed analytically while the solute dispersion model was numerically evaluated using the Crank–Nicolson method.</div></div><div><h3>Results:</h3><div>Findings show that microgravity lowered particle concentration in the tumor, however, improved drug-loaded magnetic nanoparticle properties, and magnetic field strength reveal a positive impact on nanoparticle accumulation. Also, altered stenosis height, inclination angle, slip velocity, and other control parameters such as Peclet number, magnetic-tumor distance, drug source term, elimination, and local skin friction revealed significant differences in particle dispersion behavior before, within, and after the stenosis region.</div></div><div><h3>Conclusion:</h3><div>Our results suggest potential future therapeutic applications of altered gravity in combination with MDT phenomena to improve drug delivery for noninvasive therapeutic strategies.</div></div>","PeriodicalId":10340,"journal":{"name":"Chinese Journal of Physics","volume":"92 ","pages":"Pages 915-935"},"PeriodicalIF":4.6,"publicationDate":"2024-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142525979","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}

引用次数: 0

Cilia-assisted flow of electrically conducting micropolar fluid in a heated curved channel under Soret and Dufour effects 在索雷特和杜富尔效应作用下，纤毛辅助导电微极性流体在加热弯曲通道中流动

IF 4.6 2区物理与天体物理

Chinese Journal of Physics Pub Date : 2024-10-15 DOI: 10.1016/j.cjph.2024.10.018

M.S. Arslan, Z. Abbas, M.Y. Rafiq

{"title":"Cilia-assisted flow of electrically conducting micropolar fluid in a heated curved channel under Soret and Dufour effects","authors":"M.S. Arslan, Z. Abbas, M.Y. Rafiq","doi":"10.1016/j.cjph.2024.10.018","DOIUrl":"10.1016/j.cjph.2024.10.018","url":null,"abstract":"<div><div>Cilia flow plays a crucial role in biological systems such as the movement of mucus in the respiratory tract, circulation of cerebrospinal fluid in the brain, and propulsion of sperm cells. Understanding the cilia flow of viscous fluids is essential for elucidating the biomechanics of these processes and their implications for health and disease. Motivated by such numerous biomedical applications, this article aims to exhibit the influence of heat and mass transfer on the ciliary flow of an electrical conducting micropolar fluid in a curved channel. The energy and concentration equations are modulated with viscous dissipation, Soret, and Dufour effects. The constitutive equations are simplified by the lubrication approximation and then solved numerically using the implicit finite difference method (FDM). Results for velocity, pumping phenomenon, concentration, thermal field, rate of heat transfer, streamlines, skin friction coefficient, Nusselt number, and Sherwood number are analyzed subject to pertinent parameters. The study reveals that velocity is enhanced via both the micropolar parameter and curvature parameter. Temperature enhances for larger values of Dufour and Brickman numbers. Furthermore, the radial magnetic field plays a resistive role in the trapped bolus. The findings presented in this study should prove beneficial for researchers in the domains of medicine, engineering, science, and fluid mechanics. Further, it is found that the micropolar fluid model is more suitable for biofluids like blood.</div></div>","PeriodicalId":10340,"journal":{"name":"Chinese Journal of Physics","volume":"92 ","pages":"Pages 1009-1025"},"PeriodicalIF":4.6,"publicationDate":"2024-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142554203","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}

引用次数: 0

Silicon nitride directional coupler-based polarization beam splitter utilizing shallow ridge waveguides for improved fabrication tolerance 基于氮化硅定向耦合器的偏振分束器，利用浅脊波导提高制造公差

IF 4.6 2区物理与天体物理

Chinese Journal of Physics Pub Date : 2024-10-13 DOI: 10.1016/j.cjph.2024.10.014

Po-Hsiang Chiu , Yi-Jia Huang , Yong-Jun Chen , Zi-Xuan Xu , Hsing-Hsiang Wang , Wen-Hsien Huang , Chun-Ta Wang

{"title":"Silicon nitride directional coupler-based polarization beam splitter utilizing shallow ridge waveguides for improved fabrication tolerance","authors":"Po-Hsiang Chiu , Yi-Jia Huang , Yong-Jun Chen , Zi-Xuan Xu , Hsing-Hsiang Wang , Wen-Hsien Huang , Chun-Ta Wang","doi":"10.1016/j.cjph.2024.10.014","DOIUrl":"10.1016/j.cjph.2024.10.014","url":null,"abstract":"<div><div>This study presents the design and fabrication of a silicon nitride (Si<sub>3</sub>N<sub>4</sub>) asymmetrical directional coupler (DC)-based polarization beam splitter (PBS) utilizing a shallow ridge waveguide structure. The use of Si<sub>3</sub>N<sub>4</sub> with a moderate refractive index contrast and the design of a shallow ridge waveguide enables the DC structure to have a wider coupling gap of approximately 600 nm, which can be readily achieved with standard I-line lithography. The simulation results indicate that the polarization splitting is highly efficient with minimal insertion loss. This is corroborated by the experimental measurements, which show consistent broadband performance. The fabricated polarization beam splitter (PBS) exhibits a high polarization extinction ratio (PER) of over 20 dB for both transverse electric (TE) and transverse magnetic (TM) modes across a broad bandwidth of 120 nm (1500–1620 nm). This work demonstrates the potential of shallow ridge Si<sub>3</sub>N<sub>4</sub> waveguides to enhance the fabrication tolerance and performance of integrated photonic devices.</div></div>","PeriodicalId":10340,"journal":{"name":"Chinese Journal of Physics","volume":"92 ","pages":"Pages 1078-1084"},"PeriodicalIF":4.6,"publicationDate":"2024-10-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142577951","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}

引用次数: 0

Optical parameter inversion of thin films based on angular reflectance spectroscopy 基于角反射光谱的薄膜光学参数反演

IF 4.6 2区物理与天体物理

Chinese Journal of Physics Pub Date : 2024-10-13 DOI: 10.1016/j.cjph.2024.10.013

Jian-Xiao Liu , Ling-Hui Meng , Shi-Yao Chong , Jiong-Ju Hao , Hong-Wei Yang

{"title":"Optical parameter inversion of thin films based on angular reflectance spectroscopy","authors":"Jian-Xiao Liu , Ling-Hui Meng , Shi-Yao Chong , Jiong-Ju Hao , Hong-Wei Yang","doi":"10.1016/j.cjph.2024.10.013","DOIUrl":"10.1016/j.cjph.2024.10.013","url":null,"abstract":"<div><div>This article proposes a method for obtaining the refractive index and thickness of thin films based on reflectivity at different angles combined with optimization algorithms. This method has high computational accuracy for both high absorption films (such as aluminum films, gold films, etc.) and low absorption films (such as MgF<sub>2</sub> films). Since this study did not adopt the inversion scheme of refractive index dispersion equation fitting, it can be used for optical constant inversion in the case of unknown composition of coating materials. The results indicate that this method can simultaneously obtain high-precision information on the complex refractive index and film thickness of the coating material on the substrate. The calculation example achieved a thickness inversion error of 0.165 % for a 2nm metal aluminum film layer and 0.3303 % for a 150 nm MgF<sub>2</sub> transparent film layer. Therefore, this study may provide further guidance for high absorption and measurement of the complex refractive index and thickness of transparent films.</div></div>","PeriodicalId":10340,"journal":{"name":"Chinese Journal of Physics","volume":"92 ","pages":"Pages 840-848"},"PeriodicalIF":4.6,"publicationDate":"2024-10-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142526142","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}

引用次数: 0

Understanding small neutrino mass and its implication 了解小中微子质量及其影响

IF 4.6 2区物理与天体物理

Chinese Journal of Physics Pub Date : 2024-10-11 DOI: 10.1016/j.cjph.2024.10.009

Hsiang-nan Li

{"title":"Understanding small neutrino mass and its implication","authors":"Hsiang-nan Li","doi":"10.1016/j.cjph.2024.10.009","DOIUrl":"10.1016/j.cjph.2024.10.009","url":null,"abstract":"<div><div>We have derived previously the relations between the neutrino masses and mixing angles in a dispersive analysis on the mixing of neutral leptonic states. The only involved assumption is that the electroweak symmetry of the Standard Model (SM) is restored at a high energy scale in some new physics scenario, which diminishes the box diagrams responsible for the mixing. Here we include corrections to the analysis up to three loops, arising from exchanges of additional neutral and charged scalars in the electroweak symmetric phase. The solution to the dispersion relation for the <span><math><mrow><msup><mrow><mi>μ</mi></mrow><mrow><mo>−</mo></mrow></msup><msup><mrow><mi>e</mi></mrow><mrow><mo>+</mo></mrow></msup></mrow></math></span>-<span><math><mrow><msup><mrow><mi>μ</mi></mrow><mrow><mo>+</mo></mrow></msup><msup><mrow><mi>e</mi></mrow><mrow><mo>−</mo></mrow></msup></mrow></math></span> mixing generates a typical neutrino mass <span><math><mrow><msub><mrow><mi>m</mi></mrow><mrow><mi>ν</mi></mrow></msub><mo>∼</mo><mi>O</mi><mrow><mo>(</mo><mn>1</mn><mo>)</mo></mrow><mspace></mspace><mi>eV</mi></mrow></math></span> in the SM unambiguously. The solution also favors the normal ordering of the neutrino masses over the inverted one, and links the large electroweak symmetry restoration, i.e., new physics scale to the small neutrino mass.</div></div>","PeriodicalId":10340,"journal":{"name":"Chinese Journal of Physics","volume":"92 ","pages":"Pages 1043-1054"},"PeriodicalIF":4.6,"publicationDate":"2024-10-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142573017","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}

引用次数: 0

Probing the two-electron-interaction-induced three new hopping processes in a double quantum-dot system revealed by finite-frequency shot noise 探测有限频射噪声揭示的双量子点系统中双电子相互作用诱导的三个新跳跃过程

IF 4.6 2区物理与天体物理

Chinese Journal of Physics Pub Date : 2024-10-11 DOI: 10.1016/j.cjph.2024.10.007

Hai-Bin Xue, Xing-Yun Lü, Bin Chen, Jian-Bin Chen, Li-Li Xing

{"title":"Probing the two-electron-interaction-induced three new hopping processes in a double quantum-dot system revealed by finite-frequency shot noise","authors":"Hai-Bin Xue, Xing-Yun Lü, Bin Chen, Jian-Bin Chen, Li-Li Xing","doi":"10.1016/j.cjph.2024.10.007","DOIUrl":"10.1016/j.cjph.2024.10.007","url":null,"abstract":"<div><div>In the serially coupled double quantum dot (DQD) system, the two-electron-interaction-induced electron hopping processes and spin-exchange hopping processes play a crucial role in manipulating the spin degree of freedom of localized electrons in the DQD system. Consequently, from the perspective of electron transport, how to detect the new hopping processes induced by the two-electron interaction has become an increasingly important issue. Here, the influences of the three new hopping processes predicted by the generalized Hubbard model on the finite-frequency shot noise of electron transport through a serially coupled DQD system are studied. It is demonstrated that in the energy-level detuning case the criterion for the existence of the electron-occupation-modulated hopping processes is that the maximum number of peaks and dips of the finite-frequency shot noise equals eight while in the energy-level alignment case the criteria for the existence of the two-electron-interaction-induced three new hopping processes, and the antiparallel-electron-spin-exchange hopping and electron-pair hopping processes, and the electron-occupation-modulated hopping processes are that the maximum numbers of peaks and dips equal eight, seven, and six, respectively. Therefore, these results provide an alternative way to detect the three new hopping processes predicted by the generalized Hubbard model in the serially coupled DQD system.</div></div>","PeriodicalId":10340,"journal":{"name":"Chinese Journal of Physics","volume":"92 ","pages":"Pages 824-839"},"PeriodicalIF":4.6,"publicationDate":"2024-10-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142526148","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}

引用次数: 0

Dynamics of a stochastic impulsive vegetation system with regime switching 具有系统切换的随机脉冲植被系统的动力学特性

IF 4.6 2区物理与天体物理

Chinese Journal of Physics Pub Date : 2024-10-10 DOI: 10.1016/j.cjph.2024.09.043

He Liu , Chuanjun Dai , Hengguo Yu , Yi Wang , Qing Guo , Jianbing Li , Min Zhao

{"title":"Dynamics of a stochastic impulsive vegetation system with regime switching","authors":"He Liu , Chuanjun Dai , Hengguo Yu , Yi Wang , Qing Guo , Jianbing Li , Min Zhao","doi":"10.1016/j.cjph.2024.09.043","DOIUrl":"10.1016/j.cjph.2024.09.043","url":null,"abstract":"<div><div>This paper describes an analytical and numerical investigation of a novel stochastic impulsive vegetation system with regime switching. Impulsive control, white noise, regime switching, and rainfall are modeled as crucial factors to simulate natural ecological phenomena, with the aim to explore the effects of those factors on the dynamics of vegetation system. Dynamics of the system, including the existence and uniqueness of global positive solutions, extinction, non-persistence in the mean, weak persistence and stochastic persistence, are investigated firstly under the effects of impulsive control and regime switching. For system without impulsive perturbations, we investigate the existence and uniqueness of the stationary distribution for the system, demonstrating that the vegetation can survive forever. Using a sophisticated sensitivity analysis technique, it is found that the vegetation biomass is highly sensitive to the rainfall but least sensitive to the saturation constant of the vegetation consumption. Our numerical results reveal that either the reduced rainfall or increased environmental disturbance can tip the balance of vegetation system, but this relationship can be effectively regulated by implementing impulsive control schemes. Additionally, it is observed that system at high-level rainfall may be detrimental to maintain the balance of vegetation, but regime switching in rainfall patterns can balance different states of vegetation and provide higher survival chance for vegetation. Significantly, it emphasizes that the persistence-extinction behaviors of the vegetation are more sensitive to the change of regime switching, indicating that the proper and general environmental disturbances is beneficial to maintain dynamic balance of vegetation system. These findings may provide new insights into the complex vegetation system dynamics.</div></div>","PeriodicalId":10340,"journal":{"name":"Chinese Journal of Physics","volume":"92 ","pages":"Pages 987-1008"},"PeriodicalIF":4.6,"publicationDate":"2024-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142554202","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}

引用次数: 0

Computational evaluating on the role of sac centerline length on hemorrhage risk of anterior cerebral artery with saccular aneurysm 计算评估囊中心线长度对大脑前动脉囊状动脉瘤出血风险的影响

IF 4.6 2区物理与天体物理

Chinese Journal of Physics Pub Date : 2024-10-09 DOI: 10.1016/j.cjph.2024.10.006

Qingquan Zhang , Zhenjin Su , Zeshang Guo

{"title":"Computational evaluating on the role of sac centerline length on hemorrhage risk of anterior cerebral artery with saccular aneurysm","authors":"Qingquan Zhang , Zhenjin Su , Zeshang Guo","doi":"10.1016/j.cjph.2024.10.006","DOIUrl":"10.1016/j.cjph.2024.10.006","url":null,"abstract":"<div><div>The present article investigates geometrical features of an aneurysm, particularly the sac centerline length (SCL), in determining the hemodynamic environment within the aneurysm for evaluation of the hemorrhage risk. Indeed, understanding how these geometric characteristics influence blood flow patterns is essential for assessing rupture risk and optimizing treatment strategies. Computational fluid dynamic is used to perform computational modeling of the blood hemodynamic in Anterior Communicating Artery (ACA) cases. Wall shear stress (WSS), Oscillatory Shear Index (OSI) and pressure over sac surface are investigated and compared for selected saccular aneurysm to evaluate risk of aneurysm rupture when sac centerline length is varied. Comparison of the results show that the inverse relationship between sac centerline length and these key hemodynamic parameters (OSI, velocity, WSS) underscores the importance of geometrical factors in assessing aneurysm rupture risk. Longer sac centerline lengths appear to be associated with more stable flow dynamics and reduced mechanical stress, while shorter sac lengths correlate with more disturbed and high-stress conditions.</div></div>","PeriodicalId":10340,"journal":{"name":"Chinese Journal of Physics","volume":"92 ","pages":"Pages 975-986"},"PeriodicalIF":4.6,"publicationDate":"2024-10-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142554204","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}

引用次数: 0