An Automated Three-Dimensional Particle Tracking Technique for the Study of Modeled Arterial Flow Fields

1995 ◽  
Vol 117 (2) ◽  
pp. 211-218 ◽  
Author(s):  
R. Tsao ◽  
S. A. Jones ◽  
D. P. Giddens ◽  
C. K. Zarins ◽  
S. Glagov
Keyword(s):  
Particle Tracking ◽  
Dynamic Properties ◽  
Video Recording ◽  
Three Dimensional ◽  
Flow Fields ◽  
Laser Doppler ◽  
Tracking Data ◽  
Tracking Technique ◽  
Doppler Data ◽  
Particle Paths

An automated three-dimensional particle tracking technique has been developed to study particle motion in modeled flow fields. A high speed video recording system, Kodak Ektapro 1000, with two cameras airanged relatively orthogonally is used for this technique. The particle tracking data are compared to theoretical Poiseuille flow and to laser Doppler data from an axisymmetric stenosis model. The particle tracking data are in good agreement with both theoretical and laser Doppler data, and at least 79 percent of the particle paths were determined successfully. Fluid dynamic properties derived by this technique are: 3-D particle paths, velocity, and particle residence time.

scholarly journals Particle Tracking Technique and Velocity Measurement of Visualized Flow Fields by means of Genetic Algorithm

1993 ◽  
Vol 13 (Supplement1) ◽  
pp. 35-38 ◽  
Author(s):  
Ryu-ichiro OHYAMA ◽  
Toshiyuki TAKAGI ◽  
Takaaki TSUKIJI ◽  
Shohachiro NAKANISHI ◽  
Kiyoji KANEKO
Keyword(s):  
Genetic Algorithm ◽  
Particle Tracking ◽  
Velocity Measurement ◽  
Flow Fields ◽  
Tracking Technique

Application of a three-dimensional (3D) particle tracking method to microfluidic particle focusing

Lab on a Chip ◽  
2014 ◽  
Vol 14 (8) ◽  
pp. 1443-1451 ◽  
Author(s):  
Michael H. Winer ◽  
Ali Ahmadi ◽  
Karen C. Cheung
Keyword(s):  
Particle Tracking ◽  
Three Dimensional ◽  
Tracking Method ◽  
Tracking Technique ◽  
Particle Focusing ◽  
Particle Tracking Method

This work represents the first implementation of a defocusing-based three-dimensional (3D) particle tracking technique for microfluidic particle focusing applications.

Real gas flow fields about three dimensional configurations

1983 ◽  
Author(s):  
A. BALAKRISHNAN ◽  
C. LOMBARD ◽  
W.C. DAVY
Keyword(s):  
Gas Flow ◽  
Three Dimensional ◽  
Flow Fields ◽  
Real Gas

scholarly journals Fast Overlap Detection between Hard-Core Colloidal Cuboids and Spheres. The OCSI Algorithm

Algorithms ◽  
2021 ◽  
Vol 14 (3) ◽  
pp. 72
Author(s):  
Luca Tonti ◽  
Alessandro Patti
Keyword(s):  
Colloidal Particles ◽  
Dynamic Properties ◽  
Wide Spectrum ◽  
Three Dimensional ◽  
Hard Core ◽  
Detection Algorithm ◽  
Three Dimensional Objects ◽  
Aggregation Behaviour ◽  
Sphere Radius ◽  
User Friendly

Collision between rigid three-dimensional objects is a very common modelling problem in a wide spectrum of scientific disciplines, including Computer Science and Physics. It spans from realistic animation of polyhedral shapes for computer vision to the description of thermodynamic and dynamic properties in simple and complex fluids. For instance, colloidal particles of especially exotic shapes are commonly modelled as hard-core objects, whose collision test is key to correctly determine their phase and aggregation behaviour. In this work, we propose the Oriented Cuboid Sphere Intersection (OCSI) algorithm to detect collisions between prolate or oblate cuboids and spheres. We investigate OCSI’s performance by bench-marking it against a number of algorithms commonly employed in computer graphics and colloidal science: Quick Rejection First (QRI), Quick Rejection Intertwined (QRF) and a vectorized version of the OBB-sphere collision detection algorithm that explicitly uses SIMD Streaming Extension (SSE) intrinsics, here referred to as SSE-intr. We observed that QRI and QRF significantly depend on the specific cuboid anisotropy and sphere radius, while SSE-intr and OCSI maintain their speed independently of the objects’ geometry. While OCSI and SSE-intr, both based on SIMD parallelization, show excellent and very similar performance, the former provides a more accessible coding and user-friendly implementation as it exploits OpenMP directives for automatic vectorization.

scholarly journals Design, Fabrication, and Testing of a Novel 3D 3-Fingered Electrothermal Microgripper with Multiple Degrees of Freedom

Micromachines ◽  
2021 ◽  
Vol 12 (4) ◽  
pp. 444
Author(s):  
Guoning Si ◽  
Liangying Sun ◽  
Zhuo Zhang ◽  
Xuping Zhang
Keyword(s):  
Degrees Of Freedom ◽  
Dynamic Properties ◽  
Three Dimensional ◽  
Polyimide Film ◽  
Zebrafish Embryos ◽  
Multiple Degrees Of Freedom ◽  
Electrothermal Actuator ◽  
3D Space ◽  
Pick And Place

This paper presents the design, fabrication, and testing of a novel three-dimensional (3D) three-fingered electrothermal microgripper with multiple degrees of freedom (multi DOFs). Each finger of the microgripper is composed of a V-shaped electrothermal actuator providing one DOF, and a 3D U-shaped electrothermal actuator offering two DOFs in the plane perpendicular to the movement of the V-shaped actuator. As a result, each finger possesses 3D mobilities with three DOFs. Each beam of the actuators is heated externally with the polyimide film. The durability of the polyimide film is tested under different voltages. The static and dynamic properties of the finger are also tested. Experiments show that not only can the microgripper pick and place microobjects, such as micro balls and even highly deformable zebrafish embryos, but can also rotate them in 3D space.

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