ENAC Seminar Series by Prof. D. E. Rival
16:00 – 17:00 – Prof. David E. Rival
Associate Professor, Queen's University, CA
Pushing the boundaries of in situ Lagrangian flow measurements
The potential for clouds of distributed, Lagrangian sensors in complex environmental flows, when coupled with network-science tools, offers a myriad of fresh opportunities to characterize key transport processes critical to modeling (and adapting to) climate change. For sake of illustration, both passive (e.g. drifting seeds) as well as active (flying/swimming) sensing platforms, are described here. Some examples of optimal sensing in flying/swimming, based on proprioception, will be touched on before embarking on a description of a novel passive technique using nothing other than air-filled soap bubbles to follow the flow. Here, we show how a single-camera perspective can be used to track centimeter-sized soap bubbles in three dimensions by not only evaluating the bubble-center location but also the bubble-image size itself. Of course with such Lagrangian measurements come challenges associated with identifying flow features with inherently sparse data. Existing approaches, based on graph theory, will be reviewed before a new technique using multi-scale recurrence networks will be tested on a series of canonical problems.
Short bio:
Dr. Rival leads a large research group at the interfaces between experimental fluid dynamics, data assimilation, network science and bio-inspiration. In 2020, Dr. Rival was awarded a one-year Alexander von Humboldt research fellowship to conduct research on advanced sensing techniques in Munich. Prior to joining Queen’s, Dr. Rival completed his doctoral studies on the aerodynamics of dragonfly flight at TU Darmstadt, worked as a postdoctoral associate at MIT on shape morphing in nature, and held a research chair on atmospheric sensing at the University of Calgary. The lab is involved in a number of international research collaborations sponsored by, for instance, AFOSR and NATO, and has been featured on David Suzuki’s The Nature of Things as well as on the Discovery Channel’s Daily Planet show.
Associate Professor, Queen's University, CA
Pushing the boundaries of in situ Lagrangian flow measurements
The potential for clouds of distributed, Lagrangian sensors in complex environmental flows, when coupled with network-science tools, offers a myriad of fresh opportunities to characterize key transport processes critical to modeling (and adapting to) climate change. For sake of illustration, both passive (e.g. drifting seeds) as well as active (flying/swimming) sensing platforms, are described here. Some examples of optimal sensing in flying/swimming, based on proprioception, will be touched on before embarking on a description of a novel passive technique using nothing other than air-filled soap bubbles to follow the flow. Here, we show how a single-camera perspective can be used to track centimeter-sized soap bubbles in three dimensions by not only evaluating the bubble-center location but also the bubble-image size itself. Of course with such Lagrangian measurements come challenges associated with identifying flow features with inherently sparse data. Existing approaches, based on graph theory, will be reviewed before a new technique using multi-scale recurrence networks will be tested on a series of canonical problems.
Short bio:
Dr. Rival leads a large research group at the interfaces between experimental fluid dynamics, data assimilation, network science and bio-inspiration. In 2020, Dr. Rival was awarded a one-year Alexander von Humboldt research fellowship to conduct research on advanced sensing techniques in Munich. Prior to joining Queen’s, Dr. Rival completed his doctoral studies on the aerodynamics of dragonfly flight at TU Darmstadt, worked as a postdoctoral associate at MIT on shape morphing in nature, and held a research chair on atmospheric sensing at the University of Calgary. The lab is involved in a number of international research collaborations sponsored by, for instance, AFOSR and NATO, and has been featured on David Suzuki’s The Nature of Things as well as on the Discovery Channel’s Daily Planet show.
Practical information
- General public
- Invitation required
- This event is internal
Organizer
- ENAC
Contact
- Marc Roulet