Simulation of Flexible Tubes in VR

2007 ◽  
pp. 130-136
Author(s):  
Florian Mannuß ◽  
André Hinkenjann ◽  
Gernot Göbbels ◽  
Martin Göbel
Keyword(s):  
Flexible Tubes

scholarly journals Aerial Mapping of Odorous Gases in a Wastewater Treatment Plant Using a Small Drone

2021 ◽  
Vol 13 (9) ◽  
pp. 1757
Author(s):  
Javier Burgués ◽  
María Deseada Esclapez ◽  
Silvia Doñate ◽  
Laura Pastor ◽  
Santiago Marco
Keyword(s):  
Wastewater Treatment ◽  
Wastewater Treatment Plants ◽  
Treatment Plant ◽  
Principal Component ◽  
Hazardous Air Pollutants ◽  
Sampling System ◽  
Aerial Mapping ◽  
Sensor Signals ◽  
Current Monitoring ◽  
Flexible Tubes

Wastewater treatment plants (WWTPs) are sources of greenhouse gases, hazardous air pollutants and offensive odors. These emissions can have negative repercussions in and around the plant, degrading the quality of life of surrounding neighborhoods, damaging the environment, and reducing employee’s overall job satisfaction. Current monitoring methodologies based on fixed gas detectors and sporadic olfactometric measurements (human panels) do not allow for an accurate spatial representation of such emissions. In this paper we use a small drone equipped with an array of electrochemical and metal oxide (MOX) sensors for mapping odorous gases in a mid-sized WWTP. An innovative sampling system based on two (10 m long) flexible tubes hanging from the drone allowed near-source sampling from a safe distance with negligible influence from the downwash of the drone’s propellers. The proposed platform is very convenient for monitoring hard-to-reach emission sources, such as the plant’s deodorization chimney, which turned out to be responsible for the strongest odor emissions. The geo-localized measurements visualized in the form of a two-dimensional (2D) gas concentration map revealed the main emission hotspots where abatement solutions were needed. A principal component analysis (PCA) of the multivariate sensor signals suggests that the proposed system can also be used to trace which emission source is responsible for a certain measurement.

Dynamics of stretched flexible tubes conveying fluid

2020 ◽  
Author(s):  
R. Kamal Krishna ◽  
M Unnikrishnan ◽  
Jayaraj Kochupillai
Keyword(s):  
Flexible Tubes ◽  
Conveying Fluid

BIOFLUID MECHANICS IN FLEXIBLE TUBES

2004 ◽  
Vol 36 (1) ◽  
pp. 121-147 ◽  
Author(s):  
James B. Grotberg ◽  
Oliver E. Jensen
Keyword(s):  
Biofluid Mechanics ◽  
Flexible Tubes

Effect of Parenchymal Tethering on the Steady Propagation of a Liquid Plug in a Flexible Airway Model

2007 ◽  
Author(s):  
Hideki Fujioka ◽  
David Halpern ◽  
James B. Grotberg
Keyword(s):  
Epithelial Cells ◽  
Transition Region ◽  
Lung Surfactant ◽  
Fluid Motion ◽  
Rigid Wall ◽  
Mechanical Stresses ◽  
Liquid Plug ◽  
Steady Propagation ◽  
Liquid Flows ◽  
Flexible Tubes

Surface tension on an air-liquid interface induces liquid flows, which may cause the lung’s airways to close due to the formation of a liquid plug as a result of drainage of the liquid lining coating the airways. Formation of the plug occurs more frequently when lung-surfactant availability is reduced. [1] Mechanical stresses due to fluid motion cause pulmonary epithelial cells to be damaged. [2, 3] Our previous studies for plug propagation in a rigid wall channel show that mechanical stresses are significantly large in the front transition region of the plug compared to the rear transition region. [7, 8] Pulmonary airways are flexible tubes which are surrounded by elastic parenchyma. In this study, the steady propagation of a liquid plug in a flexible tube is investigated numerically and mechanical stresses acting on the epithelial cells are estimated.

Sign in / Sign up

Export Citation Format

Share Document