WSEAS Transactions on Fluid Mechanics最新文献_第2页

An Investigation on Uncontrolled and Vortex-Generator Controlled Supersonic Jets 对无控制和涡流发生器控制超音速喷气机的研究

WSEAS Transactions on Fluid Mechanics Pub Date : 2024-01-23 DOI: 10.37394/232013.2024.19.2

Paramesh T., Tamal Jana, M. Kaushik

{"title":"An Investigation on Uncontrolled and Vortex-Generator Controlled Supersonic Jets","authors":"Paramesh T., Tamal Jana, M. Kaushik","doi":"10.37394/232013.2024.19.2","DOIUrl":"https://doi.org/10.37394/232013.2024.19.2","url":null,"abstract":"The present study is carried out with a motivation to investigate the axisymmetric supersonic jet both experimentally and computationally. An open jet facility was utilized to carry out the experiments, and the results were compared with computational simulations employing the K-omega SST turbulence model using ANSYS software. It is important to note that, the computational validation has been done incorporating the Rayleigh Pitot formula to match the centerline pressure for the uncontrolled jet, which has not been found in any other validation studies according to the authors’ understanding. Besides, the experimental study is extended with a focus on evaluating the impact of Vortex Generators (VGs) on Mach 1.6 supersonic jets. The aim was to enhance jet mixing, a critical factor for improving engine performance. Various nozzle geometry modifications were explored in the past, but VGs emerged as the most effective method for optimizing jet mixing efficiency. The investigation revealed a substantial decrement in the supersonic jet core length when VGs were introduced at the nozzle exit, especially under favorable pressure gradients. This reduction in the supersonic core emphasized the role of VGs in enhancing mixing efficiency. The study also confirmed that VGs significantly distort wave patterns within the supersonic core, crucial for improved jet mixing. This research signifies the importance of VGs in augmenting the mixing of Mach 1.6 jets, offering the potential for improved jet performance and reduced noise emissions in the aerospace industry.","PeriodicalId":39418,"journal":{"name":"WSEAS Transactions on Fluid Mechanics","volume":"125 37","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-01-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139605045","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Water-based Fe2 O3 Ferrofluid Flow over a Rotatable Plate 水基 Fe2 O3 铁流体在可旋转板上的流动

WSEAS Transactions on Fluid Mechanics Pub Date : 2024-01-08 DOI: 10.37394/232013.2023.18.23

A. Bhandari, Akmal Husain

引用次数: 0

Numerical Investigation of the Two-Component Suspension Filtration in a Porous Medium Taking into Account Changes in the Characteristics of the Porous Medium 考虑到多孔介质特性变化的多孔介质双组分悬浮过滤数值研究

WSEAS Transactions on Fluid Mechanics Pub Date : 2023-12-22 DOI: 10.37394/232013.2023.18.20

B. Fayziev, Jamol Makhmudov, Jabbor Mustofoqulov, T. Begmatov, Rakhmon Safarov

{"title":"Numerical Investigation of the Two-Component Suspension Filtration in a Porous Medium Taking into Account Changes in the Characteristics of the Porous Medium","authors":"B. Fayziev, Jamol Makhmudov, Jabbor Mustofoqulov, T. Begmatov, Rakhmon Safarov","doi":"10.37394/232013.2023.18.20","DOIUrl":"https://doi.org/10.37394/232013.2023.18.20","url":null,"abstract":"The paper explores a mathematical model of the filtration of dual-component suspension within a porous medium characterized by two distinct zones. This model encompasses mass balance equations of suspended particles, kinetic equations of deposition formation for both reversible and irreversible deposition types for each suspension component, and incorporates Darcy’s law. In order to solve the problem, we formulate a numerical algorithm for computer-based experimentation on the basis of the finite difference method. Through the analysis of numerical findings, we establish key features of two component suspension filtration within a porous medium. Furthermore, we examine the effects of model parameters on the transport and deposition of suspended particles in a two-component suspension within porous media. The polydispersity of the suspension and the multi-stage nature of deposition kinetics can induce effects that differ from those typically observed in the transport of onecomponent suspensions with single-stage particle deposition kinetics.","PeriodicalId":39418,"journal":{"name":"WSEAS Transactions on Fluid Mechanics","volume":"2 8","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-12-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138945136","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Squeezing Flow of an Electrically Conducting Casson Fluid by Hermite Wavelet Technique 用赫米特小波技术研究导电卡松流体的挤压流

WSEAS Transactions on Fluid Mechanics Pub Date : 2023-12-22 DOI: 10.37394/232013.2023.18.21

Preetham M. P., K. S., Raghunatha K. R.

引用次数: 0

Double Diffusive Nonlinear Convective MHD Unsteady Slip-Flow Regime in a Rectangular Channel 矩形水道中的双扩散非线性对流 MHD 非稳态滑动-流动状态

WSEAS Transactions on Fluid Mechanics Pub Date : 2023-12-19 DOI: 10.37394/232013.2023.18.19

A. Yusuf, Temitope Samson Adekunle, Abd’gafar Tunde Tiamiyu, Abubakar Musa Aliyu

引用次数: 0

On New Method and 3D Codes for Shock Wave Simulation in Fluids and Solids in Euler Variables based on a Modified Godunov Scheme 基于修正戈杜诺夫方案的欧拉变量流体和固体冲击波模拟新方法和三维代码

WSEAS Transactions on Fluid Mechanics Pub Date : 2023-12-14 DOI: 10.37394/232013.2023.18.17

M. Abuziarov, E. G. Glazova, A. V. Kochetkov, S. V. Krylov

{"title":"On New Method and 3D Codes for Shock Wave Simulation in Fluids and Solids in Euler Variables based on a Modified Godunov Scheme","authors":"M. Abuziarov, E. G. Glazova, A. V. Kochetkov, S. V. Krylov","doi":"10.37394/232013.2023.18.17","DOIUrl":"https://doi.org/10.37394/232013.2023.18.17","url":null,"abstract":"A three-dimensional technique for modeling shock-wave processes both in fluids and solids and for modeling fluid-structure interaction problems is proposed. The technique is based on a modified Godunov's scheme of increased accuracy, which is the same for both fluids and solids, and uses Eulerian-Lagrangian multimesh algorithms. Improving the accuracy of the scheme is achieved only by changing the \"predictor\" step of the original Godunov scheme. A three-dimensional and time-dependent solution of Riemann's problem is used, which provides a second-order approximation in time and space in the domain of smooth solutions. Monotonicity in the domain of discontinuous solutions is ensured by the transition to the \"predictor\" step of the first-order scheme. A similar solution of the Riemann problem is used at the contact \"fluids - solids”. For each body, three types of computational grids are used with an explicit Lagrangian choice of movable free and contact surfaces. The first type of mesh used is a Lagrangian surface mesh in the form of a continuous set of triangles (STL file), which is used both to set the initial geometry of an object and to accompany it in the calculation process, and two types of volumetric three-dimensional meshes. These are the basic Cartesian fixed grid for each object, and auxiliary movable local Euler-Lagrangian grids associated with each triangle of the surface Lagrangian grid. The results of numerical simulation of the processes of the impact of ice fragments on a titanium plate, acceleration by detonation products of deformable elastoplastic bodies of various shapes, and steel strikers piercing an aluminum plate are presented.","PeriodicalId":39418,"journal":{"name":"WSEAS Transactions on Fluid Mechanics","volume":"571 2","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-12-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138974078","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Linear and Nonlinear Splitting Schemes Conserving Total Energy and Mass in the Shallow Water Model 浅水模型中保存总能量和质量的线性和非线性分割方案

WSEAS Transactions on Fluid Mechanics Pub Date : 2023-12-14 DOI: 10.37394/232013.2023.18.18

Yuri N. Skiba

引用次数: 0

Blow-up and Bounds of Solutions for a Class of Semi-Linear PseudoParabolic Equations with p(. )-Laplacian Viscoelastic Term 一类带 p(. )-拉普拉斯粘弹性项的半线性伪抛物方程的膨胀和解的边界

WSEAS Transactions on Fluid Mechanics Pub Date : 2023-12-12 DOI: 10.37394/232013.2023.18.16

Touil Nadji, Abita Rahmoune

引用次数: 0

Numerical Simulations for Electro-Osmotic Blood Flow of Magnetic Sutterby Nanofluid with Modified Darcy's Law 采用修正达西定律的磁性萨特比纳米流体电渗透血流的数值模拟

WSEAS Transactions on Fluid Mechanics Pub Date : 2023-11-20 DOI: 10.37394/232013.2023.18.15

N. Sfina, M. G. Ibrahim

{"title":"Numerical Simulations for Electro-Osmotic Blood Flow of Magnetic Sutterby Nanofluid with Modified Darcy's Law","authors":"N. Sfina, M. G. Ibrahim","doi":"10.37394/232013.2023.18.15","DOIUrl":"https://doi.org/10.37394/232013.2023.18.15","url":null,"abstract":"Owing to the considerable significance of the combination of modified law of Darcy and electric fields in biomedicine applications like drug design, and pumping of blood in heart and lung devices; so, numerical and physiological analysis on electro-osmotic peristaltic pumping of magnetic Sutterby Nanofluid is considered. Such a fluid model has not been studied before in peristaltic. The applied system of differential equations is obtained by using controls of low Reynolds number and long wavelength. Simulations for a given system are counted using two high-quality techniques, the Finite difference technique (FDM) and the Generalized Differential transform method (Generalized DTM). Vital physical parameters effects on the profiles of velocity, temperature, and Nanoparticle concentration have schemed in two different states of Sutterby fluid, the first is dilatant fluid at β<0 and Pseudo plastic fluid at β>0. A comparison between the prior results computed by FDM and Generalized-DTM and literature results are given in nearest published results have been made, and found to be excellent. The discussion puts onward a crucial observation, that the velocity of blood flow can be organized by adaptable magnetic field strength. A drug delivery system is considered one of the significant applications of such a fluid model.","PeriodicalId":39418,"journal":{"name":"WSEAS Transactions on Fluid Mechanics","volume":"47 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-11-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139256788","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Validation of a Mathematical-Based Model for the Rheological Characterization of Asphalt Mixtures 沥青混合料流变特性的数学模型验证

WSEAS Transactions on Fluid Mechanics Pub Date : 2023-11-08 DOI: 10.37394/232013.2023.18.14

Fernando Martinez, Marina Cauhape, Luis Zorzutti, Silvia Angelone

{"title":"Validation of a Mathematical-Based Model for the Rheological Characterization of Asphalt Mixtures","authors":"Fernando Martinez, Marina Cauhape, Luis Zorzutti, Silvia Angelone","doi":"10.37394/232013.2023.18.14","DOIUrl":"https://doi.org/10.37394/232013.2023.18.14","url":null,"abstract":"Asphalt mixtures are viscoelastic materials whose behavior is highly dependent on temperature and loading frequency. The influence of these factors is described through master curves constructed at a given reference temperature based on the principle of frequency-temperature superposition. These curves are used as inputs in asphalt pavement design procedures based on mechanistic principles and related to their in-service pavement performance. This paper proposes the application of the Kramers-Kronig (K-K) relations to characterize the rheological properties of asphalt materials using a mathematical approach. Due to the complexity of the integration of the K-K relations, an approximate solution of the K–K relations was used to develop a Mathematical-Based Model to predict the master curves for the Dynamic Modulus |E*| and the Phase Angle f. This model was validated using the experimental results of two different asphalt mixtures with different characteristics. The results indicate that the model is accurate, and could be an effective approach to mathematically predict the master curves of the asphalt mixture viscoelastic properties in a wide range of temperatures and frequencies.","PeriodicalId":39418,"journal":{"name":"WSEAS Transactions on Fluid Mechanics","volume":"7 4","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135390897","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0