Advanced Computational Fluid Dynamics for Emerging Engineering Processes - Eulerian vs. Lagrangian最新文献

A Coupling Algorithm of Computational Fluid and Particle Dynamics (CFPD) 一种计算流体与粒子动力学(CFPD)耦合算法

Advanced Computational Fluid Dynamics for Emerging Engineering Processes - Eulerian vs. Lagrangian Pub Date : 2019-08-02 DOI: 10.5772/INTECHOPEN.86895

A. Kim, Hyeon-Ju Kim

引用次数: 2

Scalar Conservation Laws 标量守恒定律

Advanced Computational Fluid Dynamics for Emerging Engineering Processes - Eulerian vs. Lagrangian Pub Date : 2019-04-02 DOI: 10.5772/INTECHOPEN.83637

Baver Okutmustur

{"title":"Scalar Conservation Laws","authors":"Baver Okutmustur","doi":"10.5772/INTECHOPEN.83637","DOIUrl":"https://doi.org/10.5772/INTECHOPEN.83637","url":null,"abstract":"We present a theoretical aspect of conservation laws by using simplest scalar models with essential properties. We start by rewriting the general scalar conservation law as a quasilinear partial differential equation and solve it by method of characteristics. Here we come across with the notion of strong and weak solutions depending on the initial value of the problem. Taking into account a special initial data for the left and right side of a discontinuity point, we get the related Riemann problem. An illustration of this problem is provided by some examples. In the remaining part of the chapter, we extend this analysis to the gas dynamics given in the Euler system of equations in one dimension. The transformations of this system into the Lagrangian coordinates follow by applying a suitable change of coordinates which is one of the main issues of this section. We next introduce a first-order Godunov finite volume scheme for scalar conservation laws which leads us to write Godunov schemes in both Eulerian and Lagrangian coordinates in one dimension where, in particular, the Lagrangian scheme is reformulated as a finite volume method. Finally, we end up the chapter by providing a comparison of Eulerian and Lagrangian approaches.","PeriodicalId":203696,"journal":{"name":"Advanced Computational Fluid Dynamics for Emerging Engineering Processes - Eulerian vs. Lagrangian","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-04-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125047866","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: 4

Modeling of Fluid-Solid Two-Phase Geophysical Flows 流固两相地球物理流动模拟

Advanced Computational Fluid Dynamics for Emerging Engineering Processes - Eulerian vs. Lagrangian Pub Date : 2018-12-19 DOI: 10.5772/INTECHOPEN.81449

Zhenhua Huang, Cheng-Hsien Lee

引用次数: 3

An Eulerian-Lagrangian Coupled Model for Droplets Dispersion from Nozzle Spray 喷嘴喷雾液滴分散的欧拉-拉格朗日耦合模型

Advanced Computational Fluid Dynamics for Emerging Engineering Processes - Eulerian vs. Lagrangian Pub Date : 2018-12-18 DOI: 10.5772/INTECHOPEN.81110

Carlos G. Sedano, C. Aguirre, A. Brizuela

引用次数: 2

Response Behavior of Nonspherical Particles in Homogeneous Isotropic Turbulent Flows 非球形粒子在均匀各向同性湍流中的响应行为

Advanced Computational Fluid Dynamics for Emerging Engineering Processes - Eulerian vs. Lagrangian Pub Date : 2018-11-05 DOI: 10.5772/INTECHOPEN.81045

S. Laín

{"title":"Response Behavior of Nonspherical Particles in Homogeneous Isotropic Turbulent Flows","authors":"S. Laín","doi":"10.5772/INTECHOPEN.81045","DOIUrl":"https://doi.org/10.5772/INTECHOPEN.81045","url":null,"abstract":"In this study, the responsiveness of nonspherical particles, specifically ellipsoids and cylinders, in homogeneous and isotropic turbulence is investigated through kinematic simulations of the fluid velocity field. Particle tracking in such flow field includes not only the translational and rotational components but also the orientation through the Euler angles and parameters. Correlations for the flow coefficients, forces and torques, of the nonspherical particles in the range of intermediate Reynolds number are obtained from the literature. The Lagrangian time autocorrelation function, the translational and rotational particle response, and preferential orientation of the nonspherical particles in the turbulent flow are studied as function of their shape and inertia. As a result, particle autocorrelation functions, translational and rotational, decrease with aspect ratio, and particle linear root mean square velocity increases with aspect ratio, while rotational root mean square velocity first increases, reaches a maximum around aspect ratio 2, and then decreases again. Finally, cylinders do not present any preferential orientation in homogeneous isotropic turbulence, but ellipsoids do, resulting in preferred orientations that maximize the cross section exposed to the flow.","PeriodicalId":203696,"journal":{"name":"Advanced Computational Fluid Dynamics for Emerging Engineering Processes - Eulerian vs. Lagrangian","volume":"46 13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-11-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127184974","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