scholarly journals Study on Aqueous Humour Hydrodynamics of Glaucoma Condition Using 3D Printed Model and Particle Image Velocimetry (PIV)

2021 ◽  
Vol 89 (1) ◽  
pp. 26-41
Author(s):  
Riyadhthusollehan Khairulfuaad ◽  
Norzelawati Asmuin ◽  
Ishkrizat Taib
Keyword(s):  
Particle Image Velocimetry ◽  
Fluid Flow ◽  
Aqueous Humour ◽  
Computational Analysis ◽  
Particle Image ◽  
Water Soluble ◽  
Silicon Rubber ◽  
Human Eye ◽  
Image Velocimetry ◽  
3D Printed

This study aims to explore the knowledge on fluid flow properties of the aqueous humour (AH), specifically on the anterior segment (AS) of the human eye for a medical condition called Glaucoma. The research objectives are to study on fluid flow characteristics of velocity and pressure of the AH on the AS of the eye using enlarged 3D printed model and computational analysis, and also to analyse the suitability of the 3D generated anterior AS in fluid flow analysis application on particle image velocimetry (PIV). Using polyvinyl alcohol (PVA) as a water-soluble 3D printing filament, a 3D model of the AS of the human eye was generated with SolidWorks 2018 and printed using Creality Ender 3. This printed model serves as the pattern for silicon rubber mould production using vacuum casting process. Analysis of AH flow hydrodynamics are conducted with computational analysis using ANSYS Workbench 19.2. Key findings support that use of PVA material suite the creation of specific shapes and patterns for 3D modelling applications alike, and silicon rubber moulding creates a non-reactive and long-lasting mould for PIV applications. Computational analysis findings support the use of the generated model for PIV applications. Overall, the study successfully supports the use of 3D printed model for PIV application and future work that can be induced include direct experimentation of the mould with PIV.

An Experimental Study of the Effect of Drag Reducing Additive on the Structure of Turbulence in Concentric Annular Pipe Flow Using Particle Image Velocimetry Technique

2013 ◽  
Author(s):  
Fabio Ernesto Rodriguez Corredor ◽  
Majid Bizhani ◽  
Ergun Kuru
Keyword(s):  
Particle Image Velocimetry ◽  
Fluid Flow ◽  
Pipe Flow ◽  
Particle Image ◽  
Polymer Concentration ◽  
Velocity Fluctuations ◽  
Polymer Fluid ◽  
Image Velocimetry ◽  
Drag Reducing Additive ◽  
Annular Pipe

The effect of drag reducing additive on the structure of turbulence in concentric annular pipe flow was investigated using Particle Image Velocimetry (PIV) technique. Experiments were conducted using a 9m long horizontal flow loop with concentric annular geometry (inner to outer pipe radius ratio = 0.4). The drag reducing additive was a commercially available partially hydrolyzed polyacrylamide (PHPA). The experiments were conducted using 0.1% V/V polymer concentration, giving a drag reduction of 26% at a solvent Reynolds number equal to 56400. Near wall local fluctuating velocity values were determined by analysing the PIV data. The root mean square (RMS) values of radial velocity fluctuations showed a significant decrease with the use of drag reducing additive. The RMS values of axial velocity fluctuations near the wall (Y+<10) were similar for both water and polymer fluid flow; though, higher peaks were obtained during the polymer fluid flow. As compared to water flow, a strong reduction in vorticity was observed during polymer fluid flow. The degree of vorticity reduction on the inner wall was higher than that of the outer wall. Results of the viscous dissipation and the shear production terms in the kinetic energy budget showed that less energy was produced and dissipated by the route of turbulence when using polymer fluid.

An Experimental Study on the Performance of Drag-Reducing Polymers in Single- and Multiphase Horizontal Flow Using Particle Image Velocimetry

2018 ◽  
Vol 140 (5) ◽  
Author(s):  
Ihab H. Alsurakji ◽  
A. Al-Sarkhi ◽  
M. Habib ◽  
Hassan M. Badr
Keyword(s):  
Particle Image Velocimetry ◽  
Particle Image ◽  
Pipe Wall ◽  
Fluid Dynamic ◽  
Water Soluble ◽  
Experimental Investigations ◽  
Two Phase ◽  
Image Velocimetry ◽  
Flow Field Characteristics ◽  
Phase Water

This paper presents experimental investigations conducted to understand the influence of water-soluble drag-reducing polymers (DRPs) in single- and two-phase (stratified wavy) flow on flow-field characteristics. These experiments have been presented for water and air–water flowing in a horizontal polyvinyl chloride 22.5-mm ID, 8.33-m long pipe. The effects of liquid flow rates and DRP concentrations on streamlines and the instantaneous velocity were investigated by using particle image velocimetry (PIV) technique. A comparison of the PIV results was performed by comparing them with the computational results obtained by fluent software. One of the comparisons has been done between the PIV results, where a turbulent flow with DRP was examined, and the laminar–computational fluid dynamic (CFD) prediction. An agreement was found in the region near the pipe wall in some cases. The results showed the powerfulness of using the PIV techniques in understanding the mechanism of DRP in single- and two-phase flow especially at the regions near the pipe wall and near the phases interface. The results of this study indicate that an increase in DRP concentrations results in an increase in drag reduction up to 45% in single-phase water flow and up to 42% in air–water stratified flow.

Biospeckle PIV (Particle Image Velocimetry) for analyzing fluid flow

2013 ◽  
Vol 30 ◽  
pp. 90-98 ◽  
Author(s):  
R.R. Soares ◽  
H.C. Barbosa ◽  
R.A. Braga ◽  
J.V.L. Botega ◽  
G.W. Horgan
Keyword(s):  
Particle Image Velocimetry ◽  
Fluid Flow ◽  
Particle Image ◽  
Image Velocimetry

An Integrated Micron-Resolution Particle Image Velocimeter/Optical Tweezers (μPIVOT) for Microenvironment Investigations

2007 ◽  
Author(s):  
James K. Lingwood ◽  
Nathalie Ne`ve ◽  
Sean S. Kohles ◽  
Derek C. Tretheway
Keyword(s):  
Particle Image Velocimetry ◽  
Fluid Flow ◽  
Optical Tweezers ◽  
Particle Image ◽  
Optical Technique ◽  
Mechanical Environment ◽  
Image Velocimetry ◽  
Particle Hydrodynamics ◽  
Particle Image Velocimeter ◽  
The Individual

A novel instrument has been developed (μPIVOT) to manipulate and characterize the mechanical environment in and around microscale objects by integrating two laser-based techniques: micron-resolution particle image velocimetry (μPIV) and optical tweezers (OT). While the μPIVOT enables a new realm of microscale studies, it still maintains the individual capabilities of each optical technique. Ongoing investigations will provide a unique perspective towards understanding microscale phenomena including cell biomechanics, non-Newtonian fluid flow, and single particle or particle-particle hydrodynamics.

An Experimental Study of Turbulent Non-Newtonian Fluid Flow in Concentric Annuli Using Particle Image Velocimetry Technique

2013 ◽  
Author(s):  
Majid Bizhani ◽  
Fabio Ernesto Rodriguez Corredor ◽  
Ergun Kuru
Keyword(s):  
Reynolds Number ◽  
Particle Image Velocimetry ◽  
Fluid Flow ◽  
Particle Image ◽  
Polymer Concentration ◽  
Maximum Velocity ◽  
Bulk Velocity ◽  
Polymer Fluid ◽  
Aqueous Polymer ◽  
Image Velocimetry

Turbulent flow of a Non-Newtonian polymer fluid through concentric annuli was studied using 9 m long horizontal flow loop (inner to outer pipe radius ratio = 0.4) and Particle Image Velocimetry (PIV) technique. A high molecular weight, anionic, water soluble, acrylamide-based copolymer was used as a viscosifier. The aqueous polymer solution exhibited power law rheology with strong shear thinning behavior. Experiments with aqueous polymer solutions have been conducted at the same bulk velocity as water experiments. Mean bulk velocity values changed from 0.827 to 1.164 m/s, corresponding to solvent (water) Reynolds number from 46000 to 68000. Mean axial velocity and Reynolds stress distribution in the near wall region (considering both inner and outer walls) and in the whole annular gap were determined. Axial mean velocity profile was found to be following the universal wall law close to the wall, but it deviated from logarithmic law with an increased slope in the logarithmic zone. Radial locations of the maximum velocity values were also determined and compared to that of water flow. For the range of Reynolds numbers studied, location of maximum velocity was found to be dependent on Reynolds number. As Reynolds number increased, location of maximum velocity moved closer to inner wall. Reynolds and laminar stresses were calculated. Reynolds stresses for polymer fluid flow decreased with increasing polymer concentration and were found to be always smaller than that of water. Laminar stresses, on the other hand, were found to be always higher at higher polymer concentration, reflecting the effect of the fluid viscosity.

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