应机械结构强度与振动国家重点实验室Marie-Jean Thoraval教授邀请，荷兰屯特大学Claas Willem Visser 博士将来访我校并作学术报告。
报告人：Claas Willem Visser 博士
主持人：Marie-Jean Thoraval教授
时间：2018年10月22日上午9:00-11:00
地点：航天航空学院教一楼第二会议室
报告题目：Fluid mechanics for Functional Materials
报告摘要
A key physical challenge in additive manufacturing is that the deposited material needs to flow in order to be transported to the work piece, but requires a solid phased to retain its shape. Several strategies have been developed to resolve this paradox, including localized heating of the ink with a nozzle (as in fused filament deposition), direct-write of shear-thinning inks, and localized melting or gluing of powder beds. I will discuss another strategy: Rapid solidification of low-viscosity droplets, which enables rapid fabrication in almost arbitrary shapes including closed architectures. The focus will be on two examples:
(1) Laser-induced forward transfer of metals, which enables direct-write of functional 3D metal microdevices.
(2) In-air microfluidics, which enable high-throughput fabrication of particles that are subsequently stacked into multi-scale (bio)materials.
报告人简介
Claas Willem Visser is an Assistant Professor at the Faculty of Mechanical Engineering of the University of Twente. His lab develops multi-scale functional materials for which droplets of low-viscosity fluids are used as templates or "building blocks". In this way, mechanical, acoustic, electrical, and biological materials can be functionally optimized and 3D-printed.
From 2016 to 2018, Visser worked as a Rubicon Post-Doctoral Fellow at the Harvard John A. Paulson School of Engineering and the Wyss Institute for Biologically Inspired Engineering. Here, he developed a new method for additive manufacturing of foams in the lab of Prof. Jennifer A. Lewis.
Before that, in a one-year postdoc project at the University of Twente, he co-developed a new technology for particle fabrication and 3D printing named "In-air microfluidics". This technology is now commercialized in spinoff company IamFluidics, of which Visser is co-founder and chief scientific officer. He pursued his PhD (2011-2015) under supervision of Chao Sun and Detlef Lohse at the University of Twente, in which he contributed to fundamental studies on droplet impact as well as applications such as laser-induced transfer of metals and droplet-based bioprinting.
From 2006 to 2011, Visser worked at Tata Steel Research, Development, and Technology as a researcher, where he was involved in national and international research projects on rolling metal strip. He became research project leader of three research projects and he contributed to two successful EU-funded grant proposals. Furthermore, Visser became secretary of Tata's global focus group on work roll technology.
Visser received his MSc degree in Applied Physics from the University of Twente in 2006, for his work on drag and lift forces on bubbles and particles in rotating flows. This project was supervised by Dr. Hanneke Bluemink and Prof. Detlef Lohse.
