Efficient bi-directional coupling of 3D computational fluid-particle dynamics and 1D Multiple Path Particle Dosimetry lung models for multiscale modeling of aerosol dosimetry

2010 ◽

Author(s):

R. Kamali ◽

S. A. Shekoohi

Keyword(s):

Flow Field ◽

Particle Dynamics ◽

Fluid Particle ◽

Navier Stokes ◽

Test Cases ◽

Particle Interactions ◽

Field Equations ◽

Two Phase ◽

Coupled Equations ◽

Solution Accuracy

Two methods for solving coupled particle dynamics and flow field equations simultaneously by considering fluid-particle interactions to simulate two-phase flow are presented and compared. In many conditions, such as magnetic micro mixers and shooting high velocity particles in fluid, the fluid-particle interactions can not be neglected. In these cases it is necessary to consider fluid-particle interactions and solve the related coupled equations simultaneously. To solve these equations, suitable algorithms should be used to improve convergence speed and solution accuracy. In this paper two algorithms for solving coupled incompressible Navier-Stokes and particle dynamics equations are proposed and their efficiencies are compared by using them in a computer program. The main criterion that is used for comparison is the time they need to converge for a specific accuracy. In the first algorithm the particle dynamics and flow field equations are solved simultaneously but separately. In the second algorithm in each iteration for solving flow field equations, the particle dynamics equation is also solved. Results for some test cases are presented and compared. According to the results the second algorithm is faster than the first one especially when there is a strong coupling between phases.

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A Short Remark on Vortex as Fluid Particle from Neutrosophic Logic perspective (Towards “fluidicle” or “vorticle” model of QED.)

10.54216/ijns.070103 ◽

2020 ◽

pp. 38-46

Author(s):

Victor Christianto ◽

◽

Florentin Smarandache

Keyword(s):

Fluid Dynamics ◽

Maxwell Equations ◽

Particle Dynamics ◽

Fluid Particle ◽

Alternative Approach ◽

Neutrosophic Logic

In a previous paper in this journal (IJNS), it is mentioned about a possible approach to re-describe QED without renormalization route. As it is known that in literature, there are some attempts to reconcile vortex-based fluid dynamics and particle dynamics. Some attempts are not quite as fruitful as others. As a follow up to previous paper, the present paper will discuss two theorems for developing unification theories, and then point out some new proposals including by Simula (2020) on how to derive Maxwell equations in superfluid dynamics setting; this could be a new alternative approach towards “fluidicle” or “vorticle” model of QED. Further research is recommended in this new direction.

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Connection of Fields across the Interface in the Fluid Particle Dynamics Method for Colloidal Dispersions

Journal of the Physical Society of Japan ◽

10.1143/jpsj.76.064401 ◽

2007 ◽

Vol 76 (6) ◽

pp. 064401 ◽

Cited By ~ 11

Author(s):

Youhei Fujitani

Keyword(s):

Particle Dynamics ◽

Colloidal Dispersions ◽

Fluid Particle ◽

Dynamics Method

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LES and DES Study of Fluid-Particle Dynamics in a Human Mouth-Throat Geometry

Notes on Numerical Fluid Mechanics and Multidisciplinary Design - Turbulence and Interactions ◽

10.1007/978-3-642-14139-3_22 ◽

2010 ◽

pp. 183-189 ◽

Cited By ~ 1

Author(s):

S. T. Jayaraju ◽

S. Verbanck ◽

C. Lacor

Keyword(s):

Particle Dynamics ◽

Fluid Particle

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Inhalation exposure to particulate matter in a work environment of firefighters

MATEC Web of Conferences ◽

10.1051/matecconf/201824700039 ◽

2018 ◽

Vol 247 ◽

pp. 00039

Author(s):

Joanna Rakowska ◽

Karolina Kuskowska ◽

Wioletta Rogula-Kozłowska

Keyword(s):

Particulate Matter ◽

Respiratory Tract ◽

Work Environment ◽

Glass Fibre ◽

Inhalation Exposure ◽

Gravimetric Method ◽

Total Particulate Matter ◽

Multiple Path ◽

Particle Dosimetry

The paper presents the results of research into the concentration of respirable and total particulate matter (PM) in a work environment of firefighters. Measurements were carried out from September 2017 to October 2017 during official capacity of firefighters, i.e. during firefighting, liquidation of other local hazards. The PM concentration was examined by the gravimetric method. For this purpose, two GilAir 3 aspirators and glass fibre filters were used. During the whole duty, the samplers were placed in the pockets of the uniform, while the measuring heads were harnessed to the collar of the uniform. The deposited mass of PM in the different regions of the respiratory tract was calculated using the Eulerian Multiple Path Particle Dosimetry model. Especially high PM concentrations were noted during firefighting, The PM deposits in the head, the trachea and bronchiolar and pulmonary alveolar regions were different depending on the action the firemen had to deal with.

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