scholarly journals "Implementation of a Low Cost, Mobile Instructional Particle Image Velocimetry (mI-PIV) Learning Tool for Increasing Undergraduate and Secondary Learners' Fluid Mechanics Intuition and Interest"

2021 ◽  
Author(s):  
Jack Elliott ◽  
Angela Minichiello ◽  
Lori Caldwell
Keyword(s):  
Particle Image Velocimetry ◽  
Fluid Mechanics ◽  
Particle Image ◽  
Low Cost ◽  
Learning Tool ◽  
Image Velocimetry ◽  
Secondary Learners

Development and Testing of an Unmanned Aerial Vehicle for Large Scale Particle Image Velocimetry

2014 ◽  
Author(s):  
Christopher Pagano ◽  
Flavia Tauro ◽  
Salvatore Grimaldi ◽  
Maurizio Porfiri
Keyword(s):  
Particle Image Velocimetry ◽  
Large Scale ◽  
Field Experiments ◽  
Particle Image ◽  
Low Cost ◽  
Surface Flow ◽  
Natural Environments ◽  
Natural Stream ◽  
Image Velocimetry ◽  
Scale Particle

Large scale particle image velocimetry (LSPIV) is a nonintrusive environmental monitoring methodology that allows for continuous characterization of surface flows in natural catchments. Despite its promise, the implementation of LSPIV in natural environments is limited to areas accessible to human operators. In this work, we propose a novel experimental configuration that allows for unsupervised LSPIV over large water bodies. Specifically, we design, develop, and characterize a lightweight, low cost, and stable quadricopter hosting a digital acquisition system. An active gimbal maintains the camera lens orthogonal to the water surface, thus preventing severe image distortions. Field experiments are performed to characterize the vehicle and assess the feasibility of the approach. We demonstrate that the quadricopter can hover above an area of 1×1m2 for 4–5 minutes with a payload of 500g. Further, LSPIV measurements on a natural stream confirm that the methodology can be reliably used for surface flow studies.

An Experimental Review on Microbubble Generation to be Used in Echo-Particle Image Velocimetry Method to Determine the Pipe Flow Velocity

2013 ◽  
Vol 135 (3) ◽  
Author(s):  
Alinaghi Salari ◽  
M. B. Shafii ◽  
Shapour Shirani
Keyword(s):  
Particle Image Velocimetry ◽  
Contrast Agents ◽  
Particle Image ◽  
Low Cost ◽  
Ultrasound Contrast Agents ◽  
Surface Active Agents ◽  
Image Velocimetry ◽  
Particle Image Velocimetry Method ◽  
Microbubble Contrast Agents

Microbubbles are broadly used as ultrasound contrast agents. In this paper we use a low-cost flow focusing microchannel fabrication method for preparing microbubble contrast agents by using some surface active agents and a viscosity enhancing material to obtain appropriate microbubbles with desired lifetime and stability for any in vitro infusion for velocity measurement. All the five parameters that govern the bubble size extract and some efforts are done to achieve the smallest bubbles by adding suitable surfactant concentrations. By using these microbubbles for the echo-particle image velocimetry method, we experimentally determine the velocity field of steady state and pulsatile pipe flows.

Development of a Low Cost Particle Image Velocimetry System for Fluids Engineering Research and Education

2013 ◽  
Author(s):  
Brock P. Ring ◽  
Daniel K. Atkinson ◽  
Andrew W. Henderson ◽  
Evan C. Lemley
Keyword(s):  
Particle Image Velocimetry ◽  
Undergraduate Students ◽  
Particle Image ◽  
Low Cost ◽  
Green Laser ◽  
Frame Rate ◽  
Particle Image Velocimetry System ◽  
Engineering Research ◽  
Image Velocimetry ◽  
The Cost

Particle image velocimetry (PIV) has transformed fluid mechanics research in recent years. PIV also holds the possibility to transform fluids engineering undergraduate education with the ability of students to get hands-on experience in visualization of real flow fields. One barrier to use of PIV is the cost of a system. Research grade systems are often over $100,000 and inaccessible to many undergraduate students. Recent availability of low-cost high-frame-rate digital cameras, lasers, and public domain software offer potential accessibility for PIV for many labs at academic institutions. In this paper we describe the development of a PIV system for under $1000 including specific components and their costs. In our lab this system is currently being used for several liquid flow experiments including obtaining the flow field in and near small bifurcations. Although we are using the system for liquid flows, it may be used for gas flows as well. One issue that is addressed is the cost of flow seeding — this has been solved by using pulverized green algae as seed particles with a strong reflection by a 532 nm green laser. The system is small and portable and is useful for observing flow in locations that are not of direct interest for experiments, but may have a bearing on flow conditions in experimental measurements; such as upstream of test sections. We describe some examples of how we have used the lost-cost PIV system in our lab and how it can be used for fluids engineering education and research. The current research application of this system is performing loss coefficient calculations in a test section using the energy dissipation.

scholarly journals Fabrication of Low-Cost Patient-Specific Vascular Models for Particle Image Velocimetry

2019 ◽  
Vol 10 (3) ◽  
pp. 500-507 ◽  
Author(s):  
Katrina L. Ruedinger ◽  
Rafael Medero ◽  
Alejandro Roldán-Alzate
Keyword(s):  
Particle Image Velocimetry ◽  
Particle Image ◽  
Low Cost ◽  
Patient Specific ◽  
Image Velocimetry

scholarly journals Measuring River Surface Velocity with Doppler Radar and Particle Image Velocimetry (PIV) Using Unmanned Aerial Systems (UASs)

2021 ◽  
Author(s):  
Filippo Bandini ◽  
Monica Coppo Frias ◽  
Jun Liu ◽  
Kasparas Simkus ◽  
Sofia Karagkiolidou ◽  
...  
Keyword(s):  
Particle Image Velocimetry ◽  
Particle Image ◽  
Doppler Radar ◽  
Low Cost ◽  
High Water ◽  
Surface Velocity ◽  
Unmanned Aerial Systems ◽  
Image Velocimetry ◽  
Remote Sensing Techniques ◽  
Aerial Systems

Surface velocity is traditionally measured with invasive techniques such as velocity probes (in shallow rivers) or Acoustic Doppler Current Profilers (in deeper water). In the last years, researchers have developed remote sensing techniques, both optical (e.g. image-based velocimetry techniques) and microwave (e.g. Doppler radar). These techniques can be deployed from Unmanned Aerial Systems (UAS), which ensure fast and low-cost surveys also in remote locations. We compare the results obtained with a UAS-borne Doppler radar and UAS-borne Particle Image Velocimetry (PIV) in different rivers, which presented different hydraulic conditions (width, slope, surface roughness and sediment material). The Doppler radar was a commercial 24 GHz instrument, developed for static deployment, adapted for UAS integration. PIV was applied with natural seeding (e.g. foam, debris) when possible or, with artificial seeding (woodchips) in the stream where the density of natural particles was insufficient. PIV reconstructed the velocity profile with high accuracy typically in the order of a few cm/s in all investigated rivers, whilst UAS-borne radar was only successful in locations with high water roughness. However, UAS integration of Doppler radar is complex because of vibrations, large instrument sampling footprint, large required sampling time and difficult-to-interpret quality indicators.

Sign in / Sign up

Export Citation Format

Share Document