检索结果-内蒙古大学图书馆

Evaluation of dentinal fluid flow behaviours: a fluid-structure interaction simulation

COMPUTER METHODS IN BIOMECHANICS AND BIOMEDICAL ENGINEERING 2014年第15期17卷 1716-1726页

作者： Su, Kuo-Chih Chuang, Shu-Fen Ng, Eddie Yin-Kwee Chang, Chih-Han Natl Cheng Kung Univ Coll Engn Dept Biomed Engn Tainan 70101 Taiwan Natl Cheng Kung Univ Coll Med & Hosp Dept Stomatol Tainan 70101 Taiwan Nanyang Technol Univ Sch Mech & Aerosp Engn Coll Engn Singapore 639798 Singapore

This study uses the fluid-structure interaction (FSI) method to investigate the fluid flow in dental pulp. First, the FSI method is used for the biomechanical simulation of dental intrapulpal responses during force loading (50, 100 and 150 N) on a tooth. The results are validated by comparison with experimental outcomes. Second, the FSI method is used to investigate an intact tooth subjected to a mechanical stimulus during loading at various loading rates. Force loading (0-100 N) is applied gradually to an intact tooth surface with loading rates of 125, 62.5, 25 and 12.5 N/s, respectively, and the fluid flow changes in the pulp are evaluated. FSI analysis is found to be suitable for examining intrapulpal biomechanics. An external force applied to a tooth with a low loading rate leads to a low fluid flow velocity in the pulp chamber, thus avoiding tooth pain.

关键词： dental biomechanics dentinal fluid flow fluid-structure interaction computational fluid dynamics finite element simulation

来源：评论

学校读者我要写书评

暂无评论

fluid-structure interaction in Combustion System of a Gas Turbine-Effect of Liner Vibrations

引用

JOURNAL OF ENGINEERING FOR GAS TURBINES AND POWER-TRANSACTIONS OF THE ASME 2014年第9期136卷 091502-091502页

作者： Pozarlik, A. K. Kok, J. B. W. Univ Twente Lab Thermal Engn NL-7500 AE Enschede Netherlands

Prediction of mutual interaction between flow, combustion, acoustic, and vibration phenomena occurring in a combustion chamber is crucial for the reliable operation of any combustion device. In this paper, this is studied with application to the combustion chamber of a gas turbine. Very dangerous for the integrity of a gas turbine structure can be the coupling between unsteady heat release by the flame, acoustic wave propagation, and liner vibrations. This can lead to a closed-loop feedback system resulting in mechanical failure of the combustor liner due to fatigue and fatal damage to the turbine. Experimental and numerical investigations of the process are performed on a pressurized laboratory-scale combustor. To take into account interaction between reacting flow, acoustics, and vibrations of a liner, the computational fluid dynamics (CFD) and computational structural dynamics (CSD) calculations are combined into one calculation process using a partitioning technique. Computed pressure fluctuations inside the combustion chamber and associated liner vibrations are validated with experiments performed at the state-of-the-art pressurized combustion setup. Three liner structures with different thicknesses are studied. The numerical results agree well with the experimental data. The research shows that the combustion instabilities can be amplified by vibrating walls. The modeling approach discussed in this paper allows to decrease the risk of the gas turbine failure by prediction, for given operating conditions, of the hazardous frequency at which the thermoacoustic instabilities appear.

关键词： fluid-structure interaction thermoacoustic instabilities acoustics vibrations

来源：评论

学校读者我要写书评

暂无评论

A full-Eulerian approach for simulation of a system of fluid-rigid-elastic structure interaction based on the vorticity-stream function formulation

引用

fluid DYNAMICS RESEARCH 2023年第1期55卷 015505-015505页

作者： Farahbakhsh, Iman Paknejad, Amin Ghassemi, Hassan Amirkabir Univ Technol Dept Maritime Engn Tehran Iran Univ Tehran Coll Engn Sch Mech Engn Tehran Iran Harbin Inst Technol Sch Ocean Engn Weihai 264209 Peoples R China

A monolithic mathematical framework for understanding the fluid-rigid-elastic structure interaction problem is proposed. A numerical method in a secondary formulation of the Navier-Stokes equations accompanying a technique for imposing the rigid boundaries is applied. The one-fluid formulation of the incompressible Navier-Stokes equation, containing the terms governing the elastic structure, is transformed into the vorticity-stream function formulation. The rigid structure is imposed in the flow field based on the velocity-vorticity kinematic relation and harmonic function theorem. The vorticity, level-set function, and left Cauchy-Green deformation tensor are updated utilizing three transport equations to investigate the evolution of the velocity field, elastic structure(s) configuration, and elastic stress tensor. The method is implemented to solve three challenging problems, and the results show its capabilities in proper imposing the rigid structures in the flow field and also the simultaneous modeling the rigid and elastic structure interactions with incompressible fluid flow.

关键词： fluid-structure interaction elastic structure Navier-Stokes equation vorticity-stream function rigid structure

来源：评论

学校读者我要写书评

暂无评论

Random Material's Characteristics to Study fluid-structure interaction

Random Material's Characteristics to Study Fluid-Structure I...

引用

Rouen Symposium on Advanced Materials (ROSAM 2013)

作者： Mansouri, Mohamed Radi, Bouchaib El Hami, Abdelkhalak Saouab, Abdelghani LIMMII FST Settat Settat Morocco INSA Rouen LOFIMS F-76801 St Etienne De Rouvray France Univ Le Havre LOMC F-76610 Le Havre France

In many situations, the vibrating structures are in contact with a fluid (fluid around the hulls of a boat, reservoirs, heat exchangers in power plants, etc.), but the dynamic behavior of the structure can be significantly modified by the presence of the fluid. The sizing must take into account the effects of fluid-structure interaction. Traditionally, the study of mechanical systems fluid-structure interaction is based on a deterministic approach where all the parameters used in the model are a fixed value. But it suffices to having conducted a few experimentations to realize that the limitations of such modeling. Hence it needs to take into accounts the uncertainty in the parameters of mechanical systems. This work proposes to take the characteristics of the structure and the fluid as random and shows the efficiency of such approach. The proposed numerical stochastic method of the modal synthesis extended to reliability study, based on FORM (First Order Reliability Method) and SORM (Second Order Reliability Method) approaches, for solving the large vibro-acoustic problems. The numerical method used takes into account the uncertainties of the input parameters of the two domains. The application of the proposed method is performed on a boat propeller immersed in air and water. To validate the calculation process, the numerical study is compared to an experimental study.

关键词： fluid-structure interaction modal synthesis numerical simulation random material characteristics reliability vibro-acoustic

来源：评论

学校读者我要写书评

暂无评论

A Hybridizable Discontinuous Galerkin Method For Modeling fluid–structure interaction

A Hybridizable Discontinuous Galerkin Method For Modeling Fl...

引用

作者： Sheldon, Jason Paul PennState University Libraries

学位级别：Doctor of Philosophy

As computational methods have matured and computing power has increased over the years, simulations have grown in complexity by attempting to accurately model both larger and more involved physical systems. Although the computational demand of these simulations has increased, the required accuracy of the solution has not decreased, resulting in simulations that can become prohibitively computationally expensive. New computational tools need to be developed that both maintain solution accuracy while minimizing the ever increasing computational cost in time and *** dissertation presents a novel application of the recently developed hybridizable discontinuous Galerkin (HDG) finite element method to the multi-physics simulation of coupled fluid-structure interaction (FSI) problems. Current applications of the HDG method are reviewed and shown to be limited in scope to single-physics scenarios; however, they do include both solid and fluid problems, which are necessary for FSI modeling. Utilizing these established models, HDG formulations for linear elastostatics, linear elastodynamics, nonlinear elastodynamics, Eulerian Navier-Stokes, and arbitrary Lagrangian-Eulerian Navier-Stokes are derived. The elasticity formulations are all written in a Lagrangian reference frame, with the nonlinear formulation restricted to hyperelastic *** these individual solid and fluid formulations, the remaining challenge in FSI modeling is coupling together their disparate mathematics on the fluid-solid interface. In past work (Sheldon, 2012; Sheldon et al., 2014), a continuous Galerkin FSI model with a variety of coupling strategies was implemented, which greatly facilitated the process of creating a novel HDG FSI model. HDG FSI modeling comes with its own unique challenges, however, which are discussed and then addressed by modifications to the established component formulations. The resultant HDG FSI model is then *** of the component models, thro

关键词： Hybridizable discontinuous Galerkin fluid-structure interaction Arbitrary Lagrangian-Eulerian Navier-Stokes Elastodynamics

来源：评论

学校读者我要写书评

暂无评论

About Finite Element Analysis of fluid - structure interaction Problems 23

About Finite Element Analysis of Fluid - Structure Interacti...

引用

23rd Russian-Polish-Slovak Seminar on Theoretical Foundation of Civil Engineering (RSP) (TFoCE)

作者： Belostosky, Alexander M. Akimov, Pavel A. Kaytukov, Taymuraz B. Afanasyeva, Irina N. Usmanov, Anton R. Scherbina, Sergey V. Vershinin, Vladislav V. Moscow State Univ Civil Engn 26 Yaroslavskoe Shosse Moscow 129337 Russia Samara State Univ Architecture & Civil Engn Samara 443001 Russia

The distinctive paper is devoted to problems of solution of fluid flows, modelled using the Navier-Stokes or Euler equations, and coupled with structures ( solids). Brief literature review is presented. Problem formulation, finite element discretization, simultaneous and partitioned solution procedures, are discussed, and advantages and disadvantages of their use are mentioned. Some state-of-the-art numerical solutions, obtained by ANSYS Mechanical, ANSYS CFX and ABAQUS, are also presented to indicate problems that can now be solved using currently available techniques. (C) 2014 The Authors. Published by Elsevier Ltd.

关键词： finite element method fluid-structure interaction arbitrary Lagrangian-Eulerian formulation coupled procedures numerical solutions ANSYS Mechanical ANSYS CFD ABAQUS

来源：评论

学校读者我要写书评

暂无评论

A Comprehensive Simulation Methodology for fluid-structure interaction of Offshore Wind Turbines 11th

A Comprehensive Simulation Methodology for Fluid-Structure I...

引用

EERA 11th Deep Sea Offshore Wind R and D Conference (DeepWind)

作者： Rasheed, Adil Holdahl, Runar Kvamsdal, Trond Akervik, Espen SINTEF ICT Appl Math POB 4760 Sluppen NO-7465 Trondheim Norway Norwegian Def Res Estab FFI NO-2027 Kjeller Norway

This paper gives an overview of a comprehensive simulation methodology for fluid-structure interaction (FSI) of offshore wind turbines that is being developed at the Applied Mathematics Department of SINTEF ICT. The methodology will account for most of the scales ranging from mesoscale meteorology through microscale meteorology to the aerodynamics of wind turbine blades. The meso and micro scales are handled through a unidirectional coupling of a meso and micro scale atmospheric code while the fluid structure interaction part is dealt with an isogeometric finite element based fluid-structure simulation code IFEM. In the current work we have shown the potential of the coupled system which is actually meant to generate realistic boundary condition as a wind forecasting tool. Also we present a comparison of the IFEM computed drag, lift and moment coefficients against experimental data for flow around a 3-D oscillating airfoil. (C) 2014 Elsevier Ltd. This is an open access article under the CC BY-NC-ND license (http://***/licenses/by-nc-nd/3.0/).

关键词： fluid-structure interaction Wind Turbine Isogeometric Finite Element Method Meteorology

来源：评论

学校读者我要写书评

暂无评论

Development of Coupled fluid-structure interaction Code for Explosion Problem

Development of Coupled Fluid-Structure Interaction Code for ...

引用

4th International Symposium on Explosion, Shock Wave and High-Energy Reaction Phenomena

作者： Saburi, Tei Kubota, Shiro Wada, Yuji Yoshida, Masatake Natl Inst Adv Ind Sci & Technol Onogawa 16-1 Tsukuba Ibaraki 3058561 Japan Explos Res Inst Inc Chiyoda Ku Tokyo 1010021 Japan

ISBN: (纸本)9783037858264

A multidimensional analysis code for reactive shocks (MARS), which is developed to solve various problems in the physical hazard analysis of high energetic materials, has been applied to such complex problems as multi-material problem and sympathetic problem because it can employ various types of equations of state and a materials database. However, it was difficult to meet a growing demand for large-scale analysis and fluid-structure interaction (FSI) analysis. To address these issues, this study reports a parallelization of the code and an implementation of the functional capability of FSI analysis, and performance results for sample problems were also shown.

关键词： parallelization fluid-structure interaction coupling analysis blast loading

来源：评论

学校读者我要写书评

暂无评论

Numerical simulation of fluid-structure interaction with water hammer in a vertical penstock subjected to high water head

Numerical simulation of fluid-structure interaction with wat...

引用

3rd International Conference on Energy, Environment and Sustainable Development (EESD 2013)

作者： Zhang, Hongming Zhang, Lixiang Kunming Univ Sci & Technol Dept Engn Mech Kunming 650500 Peoples R China

ISBN: (纸本)9783037859728

The theoretical model of weakly compressible coupling water hammer was established and a FSI program code was developed for coupled weakly compressible water with penstock movement. It combines the weakly compressible water source CFD code and FEM shell element code. The shell element based on orthogonal curvilinear coordinates was completed in FEAP. Meanwhile, the turbulence model in OpenFoam class library was called by using object-oriented technology. This code takes into account both the weak compressibility of water and fluid turbulence characteristics. Using this code, a fluid structure interaction analysis with water hammer was completed. The numerical results agree well with the field test results.

关键词： water hammer fluid-structure interaction penstock

来源：评论

学校读者我要写书评

暂无评论

Numerical Simulation of the fluid-structure interaction between Air Blast Waves and Soil structure

Numerical Simulation of the Fluid-Structure Interaction betw...

引用

4th International Meeting on Frontiers of Physics (IMFP)

作者： Umar, S. Risby, M. S. Albert, A. Luthfi Norazman, M. Ariffin, I. Alias, Y. Muhamad Univ Pertahanan Nas Malaysia Fac Engn Protect & Survivabil Res Unit PROTECT Kuala Lumpur 57000 Malaysia

ISBN: (纸本)9780735412200

Normally, an explosion threat on free field especially from high explosives is very dangerous due to the ground shocks generated that have high impulsive load. Nowadays, explosion threats do not only occur in the battlefield, but also in industries and urban areas. In industries such as oil and gas, explosion threats may occur on logistic transportation, maintenance, production, and distribution pipeline that are located underground to supply crude oil. Therefore, the appropriate blast resistances are a priority requirement that can be obtained through an assessment on the structural response, material strength and impact pattern of material due to ground shock. A highly impulsive load from ground shocks is a dynamic load due to its loading time which is faster than ground response time. Of late, almost all blast studies consider and analyze the ground shock in the fluid-structure interaction (FSI) because of its influence on the propagation and interaction of ground shock. Furthermore, analysis in the FSI integrates action of ground shock and reaction of ground on calculations of velocity, pressure and force. Therefore, this integration of the FSI has the capability to deliver the ground shock analysis on simulation to be closer to experimental investigation results. In this study, the FSI was implemented on AUTODYN computer code by using Euler-Godunov and the arbitrary Lagrangian-Eulerian (ALE). Euler-Godunov has the capability to deliver a structural computation on a 3D analysis, while ALE delivers an arbitrary calculation that is appropriate for a FSI analysis. In addition, ALE scheme delivers fine approach on little deformation analysis with an arbitrary motion, while the Euler-Godunov scheme delivers fine approach on a large deformation analysis. An integrated scheme based on Euler-Godunov and the arbitrary Lagrangian-Eulerian allows us to analyze the blast propagation waves and structural interaction simultaneously

关键词： Underground wave fluid-structure interaction Finite element analysis High explosive

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：