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Advanced Modeling and Simulation in Engineering Sciences最新文献

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Compressible flow simulation with moving geometries using the Brinkman penalization in high-order Discontinuous Galerkin 高阶不连续Galerkin中使用Brinkman惩罚的运动几何可压缩流模拟
Q1 Mathematics Pub Date : 2021-04-27 DOI: 10.1186/s40323-021-00195-4
Neda Ebrahimi Pour, N. Anand, H. Klimach, S. Roller
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引用次数: 0
An isogeometric b-rep mortar-based mapping method for non-matching grids in fluid-structure interaction 流固耦合非匹配网格的等几何b-rep砂浆映射方法
Q1 Mathematics Pub Date : 2021-04-27 DOI: 10.1186/s40323-021-00190-9
A. Apostolatos, A. Emiroglu, S. Shayegan, Fabien Péan, K. Bletzinger, R. Wüchner
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引用次数: 1
3D B-Rep meshing for real-time data-based geometric parametric analysis 三维B-Rep网格实时数据为基础的几何参数分析
Q1 Mathematics Pub Date : 2021-04-15 DOI: 10.1186/s40323-021-00194-5
T. Maquart, T. Elguedj, A. Gravouil, M. Rochette
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引用次数: 2
Investigation of pollutants formation in a diesel engine using numerical simulation 柴油机污染物形成的数值模拟研究
Q1 Mathematics Pub Date : 2021-04-03 DOI: 10.21203/RS.3.RS-366378/V1
M. Zahid, K. S. Syed
The current study aims at simulating the in-cylinder combustion process in a diesel engine and investigating the engine performance and pollutant formation. The combustion simulation is performed on a 3D sector employing appropriate models for various physical and chemical processes contributing in the combustion phenomenon. The overall model includes Transition SST turbulence model, eddy dissipation model for turbulence chemistry interaction, Moss–Brookes model for soot calculation and Zeldovich mechanism for NO production other than the usual transport equations. The numerical solutions are based on the finite volume discretization of the governing partial differential equations. Engine performance has been studied in terms of pressure, temperature and heat release rate while the pollutants formation has been investigated in terms of soot and thermal NO production. The results show that the ignition delay is quite short and that the injection timing may be successfully employed to control the combustion behavior. The simulation results are quite consistent with the expected behavior of the target variables indicating that the CFD analysis can be successfully employed in the diesel engine design. The results validation may be acknowledged in view of the mesh independence test, literature comparison and justification of the models.
本研究旨在模拟柴油机缸内燃烧过程,研究发动机性能和污染物的形成。燃烧模拟是在3D扇区上进行的,该扇区采用了对燃烧现象有贡献的各种物理和化学过程的适当模型。总体模型包括过渡SST湍流模型、湍流化学相互作用的涡耗散模型、烟尘计算的Moss–Brookes模型和NO产生的Zeldovich机制,而不是通常的传输方程。数值解基于控制偏微分方程的有限体积离散化。从压力、温度和热释放率方面研究了发动机性能,同时从烟灰和热NO产生方面研究了污染物的形成。结果表明,点火延迟时间很短,喷油正时可以成功地控制燃烧行为。仿真结果与目标变量的预期行为非常一致,表明CFD分析可以成功地应用于柴油机设计中。可以从网格独立性测试、文献比较和模型合理性的角度来确认结果验证。
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引用次数: 0
A new boundary element algorithm for modeling and simulation of nonlinear thermal stresses in micropolar FGA composites with temperature-dependent properties 一种新的边界元算法用于模拟和模拟具有温度相关特性的微极FGA复合材料的非线性热应力
Q1 Mathematics Pub Date : 2021-03-26 DOI: 10.1186/s40323-021-00193-6
M. Fahmy
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引用次数: 1
A cut finite element method for spatially resolved energy metabolism models in complex neuro-cell morphologies with minimal remeshing 基于最小重网格的复杂神经细胞形态空间分辨能量代谢模型的切割有限元方法
Q1 Mathematics Pub Date : 2021-03-22 DOI: 10.1186/s40323-021-00191-8
S. Farina, S. Claus, John Hale, A. Skupin, Stéphane P. A. Bordas
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引用次数: 10
GPU-friendly data structures for real time simulation. gpu友好的实时模拟数据结构。
Q1 Mathematics Pub Date : 2021-01-01 Epub Date: 2021-03-27 DOI: 10.1186/s40323-021-00192-7
Vincent Magnoux, Benoît Ozell

Simulators for virtual surgery training need to perform complex calculations very quickly to provide realistic haptic and visual interactions with a user. The complexity is further increased by the addition of cuts to virtual organs, such as would be needed for performing tumor resection. A common method for achieving large performance improvements is to make use of the graphics hardware (GPU) available on most general-use computers. Programming GPUs requires data structures that are more rigid than on conventional processors (CPU), making that data more difficult to update. We propose a new method for structuring graph data, which is commonly used for physically based simulation of soft tissue during surgery, and deformable objects in general. Our method aligns all nodes of the graph in memory, independently from the number of edges they contain, allowing for local modifications that do not affect the rest of the structure. Our method also groups memory transfers so as to avoid updating the entire graph every time a small cut is introduced in a simulated organ. We implemented our data structure as part of a simulator based on a meshless method. Our tests show that the new GPU implementation, making use of the new graph structure, achieves a 10 times improvement in computation times compared to the previous CPU implementation. The grouping of data transfers into batches allows for a 80-90% reduction in the amount of data transferred for each graph update, but accounts only for a small improvement in performance. The data structure itself is simple to implement and allows simulating increasingly complex models that can be cut at interactive rates.

用于虚拟外科训练的模拟器需要非常快速地执行复杂的计算,以便与用户提供真实的触觉和视觉交互。由于需要对虚拟器官进行切割,例如进行肿瘤切除,因此进一步增加了复杂性。实现大幅度性能改进的一种常见方法是利用大多数通用计算机上可用的图形硬件(GPU)。编程gpu需要比传统处理器(CPU)更严格的数据结构,这使得数据更难以更新。我们提出了一种构造图形数据的新方法,该方法通常用于手术期间软组织和一般可变形物体的基于物理的模拟。我们的方法在内存中对齐图的所有节点,独立于它们包含的边的数量,允许局部修改,而不影响结构的其余部分。我们的方法还对记忆传输进行分组,以避免每次在模拟器官中引入一个小切口时更新整个图。我们将数据结构作为基于无网格方法的模拟器的一部分来实现。我们的测试表明,新的GPU实现,利用新的图结构,在计算时间上比以前的CPU实现提高了10倍。将数据传输分组成批可以减少每次图更新传输的数据量80-90%,但只对性能有很小的提高。数据结构本身很容易实现,并允许模拟日益复杂的模型,这些模型可以以交互速率切割。
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引用次数: 2
Phase-inherent linear visco-elasticity model for infinitesimal deformations in the multiphase-field context 多相场环境下无穷小变形的相固有线性粘弹性模型
Q1 Mathematics Pub Date : 2020-12-01 DOI: 10.1186/s40323-020-00178-x
Felix K. Schwab, A. Reiter, C. Herrmann, D. Schneider, B. Nestler
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引用次数: 1
Finite cell method for functionally graded materials based on V-models and homogenized microstructures 基于v型模型和均质微结构的功能梯度材料有限单元法
Q1 Mathematics Pub Date : 2020-12-01 DOI: 10.1186/s40323-020-00182-1
B. Wassermann, N. Korshunova, S. Kollmannsberger, E. Rank, G. Elber
{"title":"Finite cell method for functionally graded materials based on V-models and homogenized microstructures","authors":"B. Wassermann, N. Korshunova, S. Kollmannsberger, E. Rank, G. Elber","doi":"10.1186/s40323-020-00182-1","DOIUrl":"https://doi.org/10.1186/s40323-020-00182-1","url":null,"abstract":"","PeriodicalId":37424,"journal":{"name":"Advanced Modeling and Simulation in Engineering Sciences","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1186/s40323-020-00182-1","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47530096","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: 2
Application of an iterative Golub-Kahan algorithm to structural mechanics problems with multi-point constraints 迭代Golub-Cahan算法在多点约束结构力学问题中的应用
Q1 Mathematics Pub Date : 2020-11-17 DOI: 10.1186/s40323-020-00181-2
C. Kruse, V. Darrigrand, N. Tardieu, M. Arioli, U. Rüde
{"title":"Application of an iterative Golub-Kahan algorithm to structural mechanics problems with multi-point constraints","authors":"C. Kruse, V. Darrigrand, N. Tardieu, M. Arioli, U. Rüde","doi":"10.1186/s40323-020-00181-2","DOIUrl":"https://doi.org/10.1186/s40323-020-00181-2","url":null,"abstract":"","PeriodicalId":37424,"journal":{"name":"Advanced Modeling and Simulation in Engineering Sciences","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-11-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43310039","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: 3
期刊
Advanced Modeling and Simulation in Engineering Sciences
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