scholarly journals A Characteristic Particle Method for Traffic Flow Simulations on Highway Networks

2012 ◽  
pp. 199-219
Author(s):  
Yossi Farjoun ◽  
Benjamin Seibold
Keyword(s):  
Traffic Flow ◽  
Particle Method ◽  
Flow Simulations ◽  
Highway Networks ◽  
Characteristic Particle

Traffic Flow on Gradient Highway and its Stability

2011 ◽  
Vol 97-98 ◽  
pp. 877-882 ◽  
Author(s):  
Wen Xing Zhu ◽  
Rui Ling Yu ◽  
Zhi Ping Jia
Keyword(s):  
Traffic Flow ◽  
Flow Model ◽  
Linear Stability Theory ◽  
Stability Conditions ◽  
Traffic Flow Model ◽  
Flow Simulations ◽  
Numerical Result ◽  
The Stability ◽  
Real Traffic ◽  
Good Agreement

In this paper we investigated the stability of the traffic flow on a single lane gradient (uphill/downhill) highway. The linear stability theory was used to analyze the model and get the stability conditions. The theoretical result shows that the slope of the gradient has an influence on the stability of traffic flow. Simulations are carried out to check the slope effect of the traffic flow model. Numerical result is in good agreement with the real traffic situations.

Accuracy and stability enhancements in the incompressible finite-volume-particle method for multiphase flow simulations

2018 ◽  
Vol 230 ◽  
pp. 59-69 ◽  
Author(s):  
Xiaoxing Liu ◽  
Ryusei Ogawa ◽  
Masatsugu Kato ◽  
Koji Morita ◽  
Shuai Zhang
Keyword(s):  
Multiphase Flow ◽  
Finite Volume ◽  
Particle Method ◽  
Flow Simulations ◽  
Accuracy And Stability

scholarly journals Air Corridors: Concept, Design, Simulation, and Rules of Engagement

Sensors ◽  
2021 ◽  
Vol 21 (22) ◽  
pp. 7536
Author(s):  
Sabrina Islam Muna ◽  
Srijita Mukherjee ◽  
Kamesh Namuduri ◽  
Marc Compere ◽  
Mustafa Ilhan Akbas ◽  
...  
Keyword(s):  
Traffic Flow ◽  
Ground Level ◽  
Operational Efficiency ◽  
Collision Probability ◽  
Concept Design ◽  
First Responder ◽  
Air Ambulances ◽  
Metropolitan Regions ◽  
Above Ground Level ◽  
Flow Simulations

Air corridors are an integral part of the advanced air mobility infrastructure. They are the virtual highways in the sky for the transportation of people and cargo in a controlled airspace at an altitude of around 1000 ft. to 2000 ft. above ground level. These corridors will be utilized by (unmanned) air taxis, which will be deployed in rural and metropolitan regions to carry passengers and freight, as well as air ambulances, which will be deployed to offer first responder services such as 911 emergencies. This paper presents fundamental insights into the design of air corridors with high operational efficiency as well as zero collisions. It begins with the definitions of air cube, skylane or track, intersection, vertiport, gate, and air corridor. Then a multi-layered air corridor model is proposed. Traffic at intersections is analyzed in detail with examples of vehicles turning in different directions. The concept of capacity of an air corridor is introduced along with the nature of distribution of locations of vehicles in the air corridor and collision probability inside the corridor are discussed. Finally, results of traffic flow simulations are presented.

Development of a Finite Volume Particle Method for 3-D fluid flow simulations

2016 ◽  
Vol 298 ◽  
pp. 80-107 ◽  
Author(s):  
E. Jahanbakhsh ◽  
C. Vessaz ◽  
A. Maertens ◽  
F. Avellan
Keyword(s):  
Fluid Flow ◽  
Finite Volume ◽  
Particle Method ◽  
Flow Simulations

Validation of a Smoothed Particle Hydrodynamics Code for Internal Flow Simulations: Application to Hemodynamics in a Realistic Left Heart Cavity Model

2010 ◽  
Author(s):  
Shahrokh Shahriari ◽  
Ibrahim Hassan ◽  
Lyes Kadem
Keyword(s):  
Reynolds Number ◽  
Left Ventricle ◽  
Smoothed Particle Hydrodynamics ◽  
Particle Method ◽  
Free Surface Flows ◽  
Left Heart ◽  
Flow Simulations ◽  
Moderate Reynolds Number ◽  
Particle Hydrodynamics ◽  
Smoothed Particle

A numerical simulation of flow in the left heart cavity, left ventricle, based on Smoothed Particle Hydrodynamics, a meshfree particle method is presented. Most of the works using this numerical method have been dedicated to simulation of free surface flows or internal flows with low Reynolds number. The present study is the first work dedicated to simulate the complex flow in a realistic rigid model of left ventricle applying the realistic pulsatile inlet velocity (having moderate Reynolds number) using a meshfree particle method. The numerical validation of our code is performed through the simulation of flow in a cavity at a Reynolds number equal to 1000. Also, the comparison of the results of flow simulation in a simplified geometry of left ventricle with the finite volume results is presented. The smoothed particle hydrodynamics method was able to resolve the flow patterns showing its potential to be applied in complex cardiovascular flow simulations.

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