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航空学院青年学术论坛第一一三讲
2018-08-31 09:28   审核人:

间:92 10:00-11:00
点:航空楼A706
邀 请 人:徐绯 教授
报 告 人:
新加坡高性能计算研究所 张智谦 高级研究员

报告题目:Recent Industry-Oriented Development of Multiscale and Multiphysics Computational Modeling and Numerical Simulation Methods

 

要:Computational modelling is crucial to the productivity and competitiveness, for businesses of all sizes and across all sectors of the economy, from the design of aircraft engines to new material development and manufacture. The power of computational modelling, already significant, is set to grow dramatically. In high-value manufacturing, modelling supports innovation in product and process design, dramatically reducing the cost for physical prototypes and testing.

Modelling can be developed and used for a variety of different purposes. This talk covers a discussion of some of these different purposes. Starting with the fundamental developments such as Meshless Methods, Smoothed Finite Element Methods, Immersed Smoothed Finite Element, and etc., the boundary of the conventional numerical methods can be largely expanded. Some laboratory applications of these methods are to be introduced, including: instability of electricity activated soft matter; mechanism study, design and optimization of microfluidic soft sensors; and etc.

Aiming to provide a total solution package for specific industry production processes in which fluid flow carries large amount of tiny particles, developing computational efficient and accurate methodology is in high demand. In these processes, it is very challenging to use strong coupling methodology (e.g. IS-FEM) to track individual particles due to the considerable computational cost. An integrated multiscale computational model has been developed to study these processes with high fidelity. The present methods have been successfully employed and validated by comparing with experiments in various applications, such as microfluidic channel design, sand adhesions on hot metal surface of engine blade, shot peening process, cold spray additive manufacturing process, , and etc.

报告人简介:

张智谦博士于2005年在西安交通大学工程力学系获得博士学位;2006年至2008年在日本庆应义塾大学任博士后研究员;2008年至2013年在新加坡国立大学及Singapore-MIT Alliance SMA)任研究员;2013年至今在新加坡高性能计算研究所工作,现任高级研究员。

张智谦博士专注于开发新型数值计算方法与先进高性能数值仿真平台。数值方法研究涉及无网格方法、光滑有限元方法、流固耦合问题的沉浸光滑有限元 、流体-固体-静电场三场耦合的有限元/光滑有限元方法,求解静电场-软物质耦合不稳定性问题的数值模拟方法、远洋开采石油软管多尺度分析数值模型等领。用于对复杂多物理场耦合系统进行数值仿真研究,如流固耦合系统、流--电耦合系统,混杂颗粒的复杂流场系统。

张智谦博士致力于与实验研究相结合验证数值计算模型,并应用于解决工业实践中的关键问题。构建了用于模拟混合离散固体颗粒的多相流体及耦合固体冲击相互作用的数值计算解决方案与仿真平台。该仿真系统软件平台成功的应用于:金属材料表面喷丸强化加工过程;金属表面高温粘砂机理多尺度模型及实验研究;金属合金以及金属基复合材料冷喷涂(Cold Spray)增材制造等。

张智谦博士共发表SCI索引学术期刊论文30余篇,多次在计算力学领域国际学术会议中发表Keynote研究报告并组织相关论题小型专题研讨会。与世界多所著名大学以及国际大型航空航天工业企业有长期与稳固的合作研究项目,担任多个由国际大型企业资助的合作研究项目负责人。


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