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Related Concept Videos

Steady, Laminar Flow Between Parallel Plates01:17

Steady, Laminar Flow Between Parallel Plates

Understanding steady, laminar flow between parallel plates is essential for analyzing and designing flow in narrow rectangular channels, commonly found in various water conveyance and drainage systems. The Navier-Stokes equations govern fluid motion and are generally challenging to solve due to their nonlinearity. However, simplifications are possible in certain cases, like the steady laminar flow between parallel plates. For this scenario, we assume steady, incompressible, laminar flow.
Steady, Laminar Flow in Circular Tubes01:23

Steady, Laminar Flow in Circular Tubes

Hagen-Poiseuille flow describes a viscous fluid's steady, incompressible flow through a cylindrical tube with a constant radius R. This flow profile is often applied to understand fluid transport in narrow channels, such as capillaries. It serves as a foundational example of laminar flow. In this model, cylindrical coordinates (r,θ,z) are used to describe the radial (r), angular (θ), and axial (z) dimensions within the tube. For Hagen-Poiseuille flow, the velocity profile is purely axial,...

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Related Experiment Video

Updated: Jun 26, 2026

Determining 3D Flow Fields via Multi-camera Light Field Imaging
14:25

Determining 3D Flow Fields via Multi-camera Light Field Imaging

Published on: March 6, 2013

A New Method Proposed for Analyzing Airflow Dynamics in Negative Pressure Isolation Chambers Using Particle Image

Min Jae Oh1, Jung Min Moon1, Seung Cheol Ko2

  • 1AI &Energy Research Center, Korea Photonics Technology Institute, Gwangju 61007, Republic of Korea.

Bioengineering (Basel, Switzerland)
|March 28, 2025
PubMed
Summary

A novel negative pressure isolation chamber effectively contains aerosols during aerosol generating procedures (AGPs). This portable hood design prevents external droplet dispersion, enhancing safety in healthcare settings.

Keywords:
PIVinfection preventionnegative pressure isolation chamber

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Last Updated: Jun 26, 2026

Determining 3D Flow Fields via Multi-camera Light Field Imaging
14:25

Determining 3D Flow Fields via Multi-camera Light Field Imaging

Published on: March 6, 2013

High-speed Particle Image Velocimetry Near Surfaces
11:59

High-speed Particle Image Velocimetry Near Surfaces

Published on: June 24, 2013

Simultaneous Measurement of Turbulence and Particle Kinematics Using Flow Imaging Techniques
10:53

Simultaneous Measurement of Turbulence and Particle Kinematics Using Flow Imaging Techniques

Published on: March 12, 2019

Area of Science:

  • Medical Engineering
  • Infectious Disease Control
  • Aerosol Science

Background:

  • Aerosol generating procedures (AGPs) pose significant infection risks during pandemics like COVID-19.
  • Existing isolation systems may lack flexibility and portability for diverse healthcare scenarios.

Purpose of the Study:

  • To develop and evaluate a negative pressure isolation chamber for containing aerosols from AGPs.
  • To assess the efficacy of the chamber in preventing external droplet dispersion.

Main Methods:

  • Particle Image Velocimetry (PIV) technology to analyze aerosol movement and containment.
  • Comparison of aerosol dispersion under negative and non-negative pressure conditions.
  • Particle concentration measurements using sensors to validate containment.

Main Results:

  • Without negative pressure, droplets dispersed widely (26.9°–34.2° diffusion angles), risking external leakage.
  • Negative pressure narrowed diffusion angles (20.0°–35.1°) and directed airflow inward, preventing dispersion.
  • Sensors confirmed full containment of particles <10 µm under negative pressure.

Conclusions:

  • The developed negative pressure chamber effectively suppresses external aerosol leakage.
  • The chamber offers superior flexibility and portability compared to conventional systems.
  • Ideal for emergency response, mobile healthcare, and outbreak management.