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Enhanced transport phenomena in Casson fluid flow over radiative moving surface: Influence of velocity and thermal slip conditions with mixed convection and chemical reaction 辐射移动面上卡松流体流动中的增强传输现象:混合对流和化学反应的速度和热滑移条件的影响
Pub Date : 2024-05-14 DOI: 10.1142/s0217984924503834
Zafar Mahmood, Mujeeb ur Rehman, Umar Khan, Bilal Ali, Md Irfanul Haque Siddiqui
Researchers are interested in the non-Newtonian fluid flow with mixed convection because of its extensive use in industry and manufacturing. Additionally, thermal radiation in convective heat transfer is critical for thermal transmission regulation. As a result, the authors provide an in-depth study of how mixed convective effects on concentration and temperature impact mass, heat, and non-Newtonian Casson fluid flow. A transverse magnetic field and vertical permeable stretched sheet affect the fluid. Nonlinear thermal radiation, Brownian motion, thermophoresis, velocity slip, and temperature slip are all examined. The governing nonlinear partial differential equations (PDEs) can be changed into especially nonlinear coupled ordinary differential equations (ODEs) with the right similarity transformation. We use the RK-45 technique in Mathematica to solve the system to accommodate different physical attributes. The data are analyzed graphically. This study shows that increasing the free convection parameters [Formula: see text] and [Formula: see text] improves the velocity profile. However, the Casson parameter, magnetic field, velocity slip, and mass suction parameter lower it. Increasing [Formula: see text], and [Formula: see text] parameters lead to a higher temperature profile, whereas [Formula: see text], and [Formula: see text] parameters have the opposite. Increased concentration is shown with [Formula: see text] and [Formula: see text] parameters, whereas [Formula: see text] and [Formula: see text] have the opposite impact. Skin friction increases against [Formula: see text] and [Formula: see text] and reduces for S and M Heat transfer increases for [Formula: see text] and S whereas reduces for [Formula: see text] and [Formula: see text] Mass transfer increases for [Formula: see text] and [Formula: see text] and reduces for [Formula: see text] and [Formula: see text].
由于混合对流在工业和制造业中的广泛应用,研究人员对混合对流的非牛顿流体流很感兴趣。此外,对流传热中的热辐射对于热传导调节至关重要。因此,作者深入研究了混合对流对浓度和温度的影响如何影响质量、热量和非牛顿卡逊流体流动。横向磁场和垂直渗透拉伸片对流体产生影响。非线性热辐射、布朗运动、热泳、速度滑移和温度滑移都在研究之列。通过正确的相似性变换,可以将支配性非线性偏微分方程(PDE)转换为特别是非线性耦合常微分方程(ODE)。我们使用 Mathematica 中的 RK-45 技术来求解该系统,以适应不同的物理属性。数据以图表形式进行分析。研究表明,增加自由对流参数[公式:见正文]和[公式:见正文]可以改善速度曲线。然而,卡松参数、磁场、速度滑移和质量吸力参数会降低速度曲线。增加[公式:见正文]和[公式:见正文]参数会导致温度曲线升高,而[公式:见正文]和[公式:见正文]参数则相反。公式:见正文]和[公式:见正文]参数显示浓度增加,而[公式:见正文]和[公式:见正文]的影响则相反。皮肤摩擦对[式:见正文]和[式:见正文]增加,而对 S 和 M 减少 传热对[式:见正文]和 S 增加,而对[式:见正文]和[式:见正文]减少 传质对[式:见正文]和[式:见正文]增加,而对[式:见正文]和[式:见正文]减少。
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引用次数: 0
A study on the optimal design of UAM seats 关于 UAM 座椅优化设计的研究
Pub Date : 2024-05-10 DOI: 10.1142/s0217984924410124
Ji-Hun Seok, Yun-Hae Kim, Sung-Youl Bae
The objective of this study is to enhance the efficiency of urban air mobility (UAM) air transportation by determining the optimal design, materials, and processes of seven different manufactured fiber-reinforced plastics (FRP), and to confirm their applicability for next-generation UAM aircraft seats. Structural designs for the aircraft seat models were carried out using carbon fiber-reinforced plastic (CFRP), glass fiber-reinforced plastic (GFRP), and GFRP chop materials, employing Autoclave, Hot-press, and vacuum-assisted resin transfer molding (VaRTM) processes, resulting in a total of seven FRP configurations. It was confirmed that CFRP seats were 50% lower weight than aluminum models, while GFRP seats showed a 30% reduction. Although Autoclave processing resulted in the highest tensile strength at 985[Formula: see text]MPa, VaRTM processing also produced strength levels comparable to Autoclave processing. Structural integrity assessments of the seat models, utilizing the Korean aviation standards (KAS), confirmed that the designed seat models exhibited no failure or deformation under the conditions required by the technical standards. This study provides insights into the potential application of the seven types of FRP materials in the design of aircraft seats, offering weight reduction benefits and meeting the structural integrity requirements outlined by KAS.
本研究的目的是通过确定七种不同纤维增强塑料(FRP)的最佳设计、材料和制造工艺,来提高城市空中交通(UAM)的效率,并确认其对下一代 UAM 飞机座椅的适用性。使用碳纤维增强塑料 (CFRP)、玻璃纤维增强塑料 (GFRP) 和玻璃纤维增强塑料切片材料,采用高压釜、热压和真空辅助树脂传递模塑 (VaRTM) 工艺,对飞机座椅模型进行了结构设计,共得出七种玻璃纤维增强塑料配置。结果表明,CFRP 座椅的重量比铝制座椅减轻了 50%,而 GFRP 座椅减轻了 30%。虽然高压釜加工产生的拉伸强度最高,达到 985[计算公式:见正文]兆帕,但 VaRTM 加工也产生了与高压釜加工相当的强度水平。根据韩国航空标准(KAS)对座椅模型进行的结构完整性评估证实,所设计的座椅模型在技术标准要求的条件下没有出现故障或变形。这项研究深入探讨了七种玻璃钢材料在飞机座椅设计中的潜在应用,既能减轻重量,又能满足 KAS 规定的结构完整性要求。
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引用次数: 0
Lump Kink interactional and breather-type waves solutions of (3+1)-dimensional shallow water wave dynamical model and its stability with applications (3+1) 维浅水波动力模型的 Lump Kink 交互波和呼吸型波解及其稳定性与应用
Pub Date : 2024-05-10 DOI: 10.1142/s0217984924504025
M. Arshad, A. Seadawy, Aliza Mehmood, Khurrem Shehzad
The shallow water equations are used to describe the behavior of water waves in various shallow regions such as coastal areas, lakes, rivers, etc. These equations are derived by making simplifying assumptions about the water depth relative to the wavelength of the waves. In this paper, the generalized exponential rational function method (gERFM) is used to construct novel wave solutions of the (3+1)-dimensional shallow water wave ((3+1)-dSWW) dynamical model. These solutions encompass distinct kinds of waves, such as solitary waves, solitons, Kink and anti-kink solitons, lump Kink interactional waves, traveling breathers-type waves and multi-peak solitons. The dynamical behavior of these wave solutions is discussed, examining the influence of free parameters on the resulting wave shapes. Furthermore, to provide a scientific elucidation of the obtained results, the solutions are presented graphically, making it easy to distinguish the dynamical features, which have practical implications in different areas of applied sciences and engineering. The stability of this dynamical model is revealed via modulational instability analysis, signifying that all analytical results are stable. The obtained results show that the given technique is universal and efficient. Through comparing the projected technique with the existing techniques, the obtained results demonstrate that the given technique is universal, pithy and efficient.
浅水方程用于描述水波在沿海地区、湖泊、河流等各种浅水区域的行为。这些方程是通过对相对于波长的水深进行简化假设而得出的。本文利用广义指数有理函数法(gERFM)构建了 (3+1)-dimensional shallow water wave ((3+1)-dSWW) 动力学模型的新波浪解。这些解包含不同类型的波,如孤波、孤立子、Kink 和反 Kink 孤子、块状 Kink 交互波、行进呼吸器型波和多峰孤立子。我们讨论了这些波解的动力学行为,研究了自由参数对所产生波形的影响。此外,为了对所获得的结果进行科学阐释,还以图形的形式展示了这些解法,使人们更容易分辨其动力学特征,这些特征对应用科学和工程学的不同领域具有实际意义。通过调制不稳定性分析揭示了该动力学模型的稳定性,表明所有分析结果都是稳定的。所得结果表明,该技术具有通用性和高效性。通过将预测技术与现有技术进行比较,得出的结果表明给定技术是通用的、精辟的和高效的。
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引用次数: 0
Dynamics of propagation patterns: An analytical investigation into fractional systems 传播模式的动力学:对分数系统的分析研究
Pub Date : 2024-05-10 DOI: 10.1142/s0217984924503974
Mostafa M. A. Khater
Recent years have seen a growing interest in fractional differential equations, particularly the fractional Chaffee-Infante ([Formula: see text]) equation, pivotal for understanding dynamics governed by fractional orders in specific physical systems. Exploring solitary wave solutions, this study employs the extended Khater method and truncated Mittag-Leffler function properties to formulate tailored solutions for the ([Formula: see text]) model. Through a traveling wave ansatz, the equation transforms into a nonlinear ordinary differential equation, revealing intricate propagation patterns of solitary waves. Visual representations aid comprehension, while rigorous validation ensures solution precision, ultimately providing a comprehensive understanding of system responses to external stimuli. This study effectively integrates analytical and numerical methodologies to derive precise solitary wave solutions, with significant implications for advancing comprehension of complex phenomena in various disciplines governed by fractional-order dynamics.
近年来,人们对分式微分方程的兴趣与日俱增,尤其是分式 Chaffee-Infante ([公式:见正文])方程,它对于理解特定物理系统中由分式阶数支配的动力学至关重要。为探索孤波解,本研究采用扩展 Khater 方法和截断 Mittag-Leffler 函数特性,为([公式:见正文])模型提出量身定制的解。通过行波反演,方程转化为非线性常微分方程,揭示了孤波错综复杂的传播模式。直观的表示有助于理解,而严格的验证确保了求解的精确性,最终提供了对系统对外部刺激反应的全面理解。这项研究有效地整合了分析和数值方法,推导出精确的孤波解,对推动理解受分数阶动力学支配的各学科中的复杂现象具有重要意义。
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引用次数: 0
Optical solitons for the Hirota–Ramani equation via improved G′G-expansion method 通过改进的 G′G-展开方法计算广田-拉马尼方程的光学孤子
Pub Date : 2024-05-10 DOI: 10.1142/s0217984924504037
S. Behera
In this work, first it is shown that the Hirota–Ramani equation, which governs the nonlinear propagation of coupled Langmuir and dust-acoustec wave in a multicomponent dusty plasma, possesses kinds of wave profile such as singular periodic profile, periodic profile, singular soliton profile, M-shape rational profile, bright soliton profile, kink profile in the form of the trigonometric, hyperbolic, and rational solutions. With the aid of symbolic computation, we select the Hirota–Ramani equation with a source to investigate the validity and advantage of the improved [Formula: see text]-expansion method and construct some frames of the 3D profiles and the contour profiles to the equation along with the 2D profiles of some solutions to understand the traveling wave dynamics. Following the selection of appropriate values for the associated parameters, more generalized solutions are provided, along with certain patterns in the solutions that are examined. This improved method is effective, concise, reliable, and can be applied for further futuristic applications.
在这项工作中,首先证明了在多组分尘埃等离子体中控制耦合朗缪尔波和尘埃-声波非线性传播的 Hirota-Ramani 方程具有各种波形,如奇异周期波形、周期波形、奇异孤子波形、M 型有理波形、明亮孤子波形、扭结波形,其形式有三角解、双曲解和有理解。借助符号计算,我们选择了带源的 Hirota-Ramani 方程,以研究改进的[公式:见正文]展开方法的有效性和优势,并构建了方程的一些三维剖面和轮廓剖面框架,以及一些解的二维剖面,以了解行波动力学。在为相关参数选择合适的值之后,就能得到更广义的解,同时还能研究解中的某些模式。这种改进的方法有效、简洁、可靠,可用于未来的进一步应用。
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引用次数: 0
A computational scheme and its comparison with optical soliton solutions for the stochastic Chen–Lee–Liu equation with sensitivity analysis 随机陈李刘方程的计算方案及其与光学孤子解的比较与敏感性分析
Pub Date : 2024-05-10 DOI: 10.1142/s0217984924503767
M. Z. Baber, Nauman Ahmed, Changjin Xu, M. Iqbal, T. Sulaiman
In this study, the stochastic Chen–Lee–Liu equation is considered numerically and analytically which is forced by the multiplicative noise in the Itô sense. The Chen–Lee–Liu equation is a special type of Schrödinger’s equation which has applications in optical fibers and photonic crystal fibers. The stochastic Crank–Nicolson scheme is formed to obtain the computational results. The numerical scheme is analyzed under the mean square sense and Von-Neumann criteria to show consistence and stability, respectively. Meanwhile, stochastic optical soliton solutions are attained by using two techniques, namely, the modified auxiliary equation method and the generalized projective Riccati equation method. These methods provide us with the different types of optical soliton solutions such as hyperbolic, trigonometric, mixed trigonometric, and rational forms. Mainly, the comparison of computational results with newly constructed optical soliton solution is shown graphically. To compare these results, initial conditions and boundary conditions are constructed by selecting some soliton solutions. The 3D and line graphs are drawn by choosing different values of parameters. Additionally, the sensitivity analysis is observed for the different initial values.
本研究从数值和分析的角度考虑了随机陈-李-刘方程,该方程受到伊托意义上的乘法噪声的影响。Chen-Lee-Liu 方程是薛定谔方程的一种特殊类型,在光纤和光子晶体光纤中得到了应用。为了得到计算结果,我们采用了随机 Crank-Nicolson 方案。根据均方意义和 Von-Neumann 准则分别对数值方案进行了分析,以显示其一致性和稳定性。同时,利用两种技术,即修正辅助方程法和广义投影里卡提方程法,获得了随机光学孤子解。这些方法为我们提供了不同类型的光学孤子解,如双曲型、三角型、混合三角型和有理型。计算结果与新构建的光学孤子解之间的比较主要以图形方式显示。为了比较这些结果,通过选择一些孤子解来构建初始条件和边界条件。通过选择不同的参数值,绘制出三维图和折线图。此外,还观察了不同初始值的敏感性分析。
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引用次数: 0
Optical fractional solitonic structures to decoupled nonlinear Schrödinger equation arising in dual-core optical fibers 双芯光纤中出现的解耦非线性薛定谔方程的光学分数孤子结构
Pub Date : 2024-05-10 DOI: 10.1142/s0217984924503780
U. Younas, J. Muhammad, Hajar F. Ismael, Muhammad Amin S. Murad, T. A. Sulaiman
This paper explores a specific class of equations that model the propagation of optical pulses in dual-core optical fibers. The decoupled nonlinear Schrödinger equation with properties of M fractional derivatives is considered as the governing equation. The proposed model consists of group-velocity mismatch and dispersion, nonlinear refractive index and linear coupling coefficient. Different types of solutions, including mixed, dark, singular, bright-dark, bright, complex and combined solitons are extracted by using the integration methods known as fractional modified Sardar subequation method and modified F-expansion method. Optical soliton propagation in optical fibers is currently a subject of great interest due to the multiple prospects for ultrafast signal routing systems and short light pulses in communications. In nonlinear dispersive media, optical solitons are stretched electromagnetic waves that maintain their intensity due to a balance between the effects of dispersion and nonlinearity. Furthermore, hyperbolic, periodic and exponential solutions are generated. A fractional complex transformation is applied to reduce the governing model into the ordinary differential equation and then by the assistance of balance principle the methods are used, depending upon the balance number. Also, we plot the different graphs with the associated parameter values to visualize the solutions behaviours with different parameter values. The findings of this work will help to identify and clarify some novel soliton solutions and it is expected that the solutions obtained will play a vital role in the fields of physics and engineering.
本文探讨了模拟光脉冲在双芯光纤中传播的一类特定方程。具有 M 分数导数特性的解耦非线性薛定谔方程被视为支配方程。提出的模型包括群速度失配和色散、非线性折射率和线性耦合系数。通过使用分数修正萨达尔子方程法和修正 F 展开法等积分方法,提取了不同类型的解,包括混合孤子、暗孤子、奇异孤子、亮暗孤子、亮孤子、复孤子和组合孤子。由于超快信号路由系统和短光脉冲在通信中的多种应用前景,光纤中的光孤子传播目前是一个备受关注的课题。在非线性色散介质中,光孤子是一种拉伸的电磁波,由于色散和非线性效应之间的平衡而保持其强度。此外,还会产生双曲、周期和指数解。我们应用分数复变将调控模型还原为常微分方程,然后根据平衡数,在平衡原理的帮助下使用各种方法。此外,我们还绘制了带有相关参数值的不同图形,以直观显示不同参数值下的求解行为。这项工作的发现将有助于识别和阐明一些新颖的孤子解,预计所获得的解将在物理学和工程学领域发挥重要作用。
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引用次数: 0
Numerical simulation of hybrid nanofluid flow consisting of polymer–CNT matrix nanocomposites subject to Lorentz force and heat source/sink across coaxial cylinders 受洛伦兹力和同轴圆柱体热源/散热影响的聚合物-CNT 基纳米复合材料混合纳米流体流动的数值模拟
Pub Date : 2024-05-10 DOI: 10.1142/s021798492450386x
Bilal Ali, Sidra Jubair, Md Irfanul Haque Siddiqui
The hybrid nanofluid (HNF) flow consists of polymer/CNT matrix nanocomposite material (MNC) across coaxial cylinders is numerically described in this study. The HNF flow is inspected under the consequences of thermal radiation, exponential heat source/sink and viscous dissipation. The HNF is prepared by adding polymer/CNT MNC in water. MNCs are highly productive elements with unique designs and properties. The MNCs are widely used in biomedicine and electrical applications due to their exceptional thermophysical properties. Based on their exceptionally high electrical conductivity, CNT/polymer nanoparticles (NPs) are also utilized as shielding for electrostatic discharge and electromagnetic interference (EMI). The HNF flow is modeled with the help of energy, continuity, and momentum equations. MATLAB package bvp4c is used to numerically handle the modeled equations. It has been perceived that the intensifying numbers of polymer/CNT MNC will lessen the fluid velocity and temperature profile in cases of both nanofluid and HNF.
本研究用数值方法描述了由聚合物/碳纳米管基纳米复合材料(MNC)组成的混合纳米流体(HNF)在同轴圆柱体上的流动。在热辐射、指数热源/热沉和粘性耗散的作用下,对 HNF 流动进行了检验。HNF 是通过在水中添加聚合物/CNT MNC 制备的。MNC 是具有独特设计和特性的高生产率元件。由于其优异的热物理性能,MNCs 被广泛应用于生物医学和电气领域。由于具有极高的导电性,CNT/聚合物纳米颗粒(NPs)还可用作静电放电和电磁干扰(EMI)的屏蔽层。利用能量、连续性和动量方程对 HNF 流动进行建模。使用 MATLAB 软件包 bvp4c 对模型方程进行数值处理。研究发现,在纳米流体和 HNF 的情况下,聚合物/CNT MNC 数量的增加会降低流体速度和温度曲线。
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引用次数: 0
Investigation into silver-engine oil nanoliquid convinced by Riga surface: Deviations in three binary nanofluids 里加表面说服银-机油纳米液体的研究:三种二元纳米流体的偏差
Pub Date : 2024-05-10 DOI: 10.1142/s0217984924503858
K. Gangadhar, G. Naga Chandrika, Saeed Dinarvand
The Riga plate is the inventive magnetic mechanism created from assembly of arranged constant magnets and alternate electrode through the plane surface. The inventive magnetic mechanism produces the wall-parallel Lorentz force into postponing the boundary layer division and reducing turbulence effect. In this analysis, the flow performance on silver-engine oil-based nanoparticles by Casson–Jeffrey, Casson–Oldroyd-B and Casson–Maxwell binary nanofluids through the Riga plate was analyzed. By analyzing the correlation transformation, the controlling model was changed into a system of ordinary differential equations, it has been resolved by applying finite element methods. The investigation of the acquired outcomes had been verified by the flow by second-grade fluids which affected importantly the governing parameters. The both EMHD parameter and nanoparticles had acted on the thermal improvement of these non-Newtonian employing fluids. The velocity profiles were magnified when the Lorentz force was instigated over the EMHD parameter. Overall, this Casson–Jeffrey and Casson–Maxwell nanofluid model is more effective than the Casson–Oldroyd-B nanofluids model.
里加板是由排列整齐的恒定磁铁和交替电极通过平面组装而成的发明性磁力机构。该发明的磁性机构产生的与壁面平行的洛伦兹力推迟了边界层的分裂,减少了湍流效应。本文分析了卡森-杰弗里、卡森-奥尔德罗伊德-B 和卡森-麦克斯韦尔二元纳米流体在银机油基纳米粒子上通过里加板的流动性能。通过分析相关变换,控制模型变成了一个常微分方程系统,并应用有限元方法进行了求解。对所获结果的研究已通过对控制参数有重要影响的二级流体的流动进行了验证。电磁流参数和纳米粒子都对这些非牛顿流体的热改进产生了影响。当洛伦兹力作用于电磁流体力学参数时,速度曲线被放大。总体而言,这种 Casson-Jeffrey 和 Casson-Maxwell 纳米流体模型比 Casson-Oldroyd-B 纳米流体模型更有效。
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引用次数: 0
Tangent hyperbolic nanofluid flow through a vertical cone: Unraveling thermal conductivity and Darcy–Forchheimer effects 流经垂直锥体的切线双曲面纳米流体:揭示导热性和达西-福克海默效应
Pub Date : 2024-05-10 DOI: 10.1142/s0217984924503986
A. A. Khan, Saliha Zafar, Aziz Khan, Th. Abdeljawad
Purpose: This paper demonstrates the way tangent hyperbolic nanofluid flow through a vertical cone is influenced by varying viscosity and varying thermal conductivity. This study also seeks to illustrate the impact of convective boundary conditions on a fluid. The mathematical modeling also takes the Darcy–Forchheimer effect into account. Methodology: Using the appropriate similarity transformation, the fluid problem is reduced into a set of nonlinear ordinary differential equations. These systems of differential equations are evaluated numerically by applying the Optimal Homotopy Asymptotic Method. Findings: The nature of emergent parameters is examined in relation to the temperature distribution, nanoparticle concentration profile, and velocity profile. An increase in variable viscosity corresponds to a decrease in fluid velocity, while enhanced thermal conductivity results in elevated fluid temperature. The skin friction coefficient, Sherwood, and Nusselt numbers are numerically examined for active concerned parameters. These findings can be put into practice in a variety of fields such as polymer cooling systems and medication. Originality: Existing literature has yet to explore the combination of tangent hyperbolic nanofluids with varying viscosity and thermal conductivity under convective boundary conditions.
目的:本文展示了切线双曲纳米流体流经垂直锥体时受不同粘度和不同导热系数影响的方式。本研究还试图说明对流边界条件对流体的影响。数学建模还考虑了达西-福克海默效应。方法:利用适当的相似性变换,将流体问题简化为一组非线性常微分方程。应用最优同调渐近法对这些微分方程系进行数值评估。研究结果:研究了与温度分布、纳米粒子浓度分布和速度分布相关的突发参数的性质。可变粘度的增加对应于流体速度的降低,而热导率的增强则导致流体温度的升高。针对活跃的相关参数,对皮肤摩擦系数、Sherwood 和 Nusselt 数值进行了数值检验。这些发现可应用于聚合物冷却系统和药物治疗等多个领域。原创性:现有文献尚未探讨对流边界条件下具有不同粘度和热导率的切线双曲纳米流体的组合。
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引用次数: 0
期刊
Modern Physics Letters B
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