scholarly journals Computational Fluid-Particle Dynamics Modeling for Unconventional Inhaled Aerosols in Human Respiratory Systems

10.5772/65361 ◽  
2016 ◽  
Author(s):  
Yu Feng ◽  
Zelin Xu ◽  
Ahmadreza Haghnegahdar
Keyword(s):  
Particle Dynamics ◽  
Fluid Particle ◽  
Dynamics Modeling ◽  
Inhaled Aerosols ◽  
Respiratory Systems

Two Algorithms for Solving Coupled Particle Dynamics and Flow Field Equations in Two-Phase Flows

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.

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

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.

The influence of temperature and density on the microscopic structure and dynamics of long polymer chains: Molecular dynamics and dissipative particle dynamics modeling

2017 ◽  
Vol 06 (03) ◽  
pp. 1750023
Author(s):  
M. Lemaalem ◽  
A. Derouiche ◽  
S. EL Fassi ◽  
H. Ridouane
Keyword(s):  
Molecular Dynamics ◽  
Dynamic Properties ◽  
Dissipative Particle Dynamics ◽  
Simulation Method ◽  
Particle Dynamics ◽  
Polymer Physics ◽  
Polymer Chains ◽  
Coarse Grained ◽  
Dynamics Modeling ◽  
Polymer Simulation

Long polymer chains that mainly exhibit thermoplastic properties are recognized to demonstrate excellent thermal and mechanical features at the molecular level. For the purpose of facilitating its study, we present the results of a coarse-grained Molecular Dynamics (MD) and Dissipative Particle Dynamics (DPD) simulations under the Canonical ensemble (NVT) conditions. For each simulation method, the structure, static and dynamic properties were analyzed, with particular emphasis on the influence of density and temperature on the equilibrium of the polymer. We find, after correcting the Soft Repulsive Potential (SRP) parameters used in DPD method, that both simulation methods describe the polymer physics with the same accuracy. This proves that the DPD method can simplify the polymer simulation and can reproduce with the same precision the equilibrium obtained in the MD simulation.

scholarly journals Particle dynamics modeling methods for colloid suspensions

2014 ◽  
Vol 1 (3) ◽  
pp. 321-356 ◽  
Author(s):  
Dan S. Bolintineanu ◽  
Gary S. Grest ◽  
Jeremy B. Lechman ◽  
Flint Pierce ◽  
Steven J. Plimpton ◽  
...  
Keyword(s):  
Particle Dynamics ◽  
Dynamics Modeling ◽  
Modeling Methods

Fluid particle dynamics simulation of charged colloidal suspensions

2004 ◽  
Vol 16 (10) ◽  
pp. L115-L123 ◽  
Author(s):  
Hiroya Kodama ◽  
Kimiya Takeshita ◽  
Takeaki Araki ◽  
Hajime Tanaka
Keyword(s):  
Colloidal Suspensions ◽  
Particle Dynamics ◽  
Fluid Particle ◽  
Dynamics Simulation
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