scholarly journals Introduction of 6-band P-1 radiation model for numerical analysis of three-dimensional air arc plasma

2008 ◽  
Vol 57 (9) ◽  
pp. 5761
Author(s):  
Wu Yi ◽  
Rong Ming-Zhe ◽  
Yang Fei ◽  
Wang Xiao-Hua ◽  
Ma Qiang ◽  
...  
Keyword(s):  
Numerical Analysis ◽  
Three Dimensional ◽  
Arc Plasma ◽  
Radiation Model

Three-Dimensional Numerical Analysis with P-1 Radiation Model in Low Voltage Switching Arc

2007 ◽  
Vol E90-C (7) ◽  
pp. 1348-1355
Author(s):  
Z. SUN ◽  
M. RONG ◽  
Y. WU ◽  
J. LI ◽  
F. YANG
Keyword(s):  
Numerical Analysis ◽  
Low Voltage ◽  
Three Dimensional ◽  
Radiation Model ◽  
Voltage Switching

Three-dimensional Time-dependent Numerical Analysis of SF6 Arc Plasma under Externally Applied Magnetic Field

2011 ◽  
Vol 131 (10) ◽  
pp. 865-871 ◽  
Author(s):  
Satoshi Hirayama ◽  
Takayasu Fujino ◽  
Motoo Ishikawa ◽  
Tadashi Mori ◽  
Katsuharu Iwamoto ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Numerical Analysis ◽  
Applied Magnetic Field ◽  
Three Dimensional ◽  
Time Dependent ◽  
Arc Plasma

scholarly journals Thermal Comfort in the Passenger Compartment Using a 3-D Numerical Analysis and Comparison with Fanger’s Comfort Models

Energies ◽  
2020 ◽  
Vol 13 (3) ◽  
pp. 690 ◽  
Author(s):  
Saboora Khatoon ◽  
Man-Hoe Kim
Keyword(s):  
Numerical Analysis ◽  
Thermal Comfort ◽  
Three Dimensional ◽  
Surface Radiation ◽  
Temperature Model ◽  
Passenger Compartment ◽  
Radiation Model ◽  
Load Effect ◽  
Comfort Index ◽  
Human Thermal Comfort

The paper presents the human thermal comfort inside a car cabin using three-dimensional numerical analysis and state of the art comfort models. Vehicular thermal comfort is a must concern factor in modern car manufacturing industries. Numerical simulations have been performed to accurately predict the temperature inside the car cabin and velocity of airflow. The numerical results are then compared using Fanger’s model, the equivalent temperature model and the modified Fanger’s model. A link has been developed using a general thermal comfort index for the considered human thermal comfort models. The general thermal comfort index takes into consideration all the investigated parameters that affect the vehicular thermal comfort thereby evaluating the whole car environment. The thermally comfortable conditions for the driver and passengers in a vehicular cabin are also addressed based on some of the thermal comfort indexes available in literature. In addition, the solar load has also been added using a surface radiation model to consider the environmental heat load effect on cabin thermal comfort.

Three dimensional numerical analysis of heat transfer during spray quenching of 22MnB5 steel with a single nozzle

2020 ◽  
Author(s):  
Emre Bulut ◽  
Gökhan Sevilgen ◽  
Ferdi Eşiyok ◽  
Ferruh Öztürk ◽  
Tuğçe Turan Abi
Keyword(s):  
Heat Transfer ◽  
Numerical Analysis ◽  
Three Dimensional ◽  
22Mnb5 Steel

Optimization of the Navy’s three-dimensional mine impact burial prediction simulation model, Impact35, using high-order numerical methods

2021 ◽  
pp. 154851292110286
Author(s):  
Athanasios Donas ◽  
Ioannis Famelis ◽  
Peter C Chu ◽  
George Galanis
Keyword(s):  
Numerical Analysis ◽  
Numerical Methods ◽  
Prediction Model ◽  
Simulation Model ◽  
Three Dimensional ◽  
Simulation System ◽  
High Order ◽  
Alternative Methodology ◽  
Runge Kutta ◽  
Fifth Order

The aim of this paper is to present an application of high-order numerical analysis methods to a simulation system that models the movement of a cylindrical-shaped object (mine, projectile, etc.) in a marine environment and in general in fluids with important applications in Naval operations. More specifically, an alternative methodology is proposed for the dynamics of the Navy’s three-dimensional mine impact burial prediction model, Impact35/vortex, based on the Dormand–Prince Runge–Kutta fifth-order and the singly diagonally implicit Runge–Kutta fifth-order methods. The main aim is to improve the time efficiency of the system, while keeping the deviation levels of the final results, derived from the standard and the proposed methodology, low.

scholarly journals Air Ventilation Performance of School Classrooms with Respect to the Installation Positions of Return Duct

2021 ◽  
Vol 13 (11) ◽  
pp. 6188
Author(s):  
Sungwan Son ◽  
Choon-Man Jang
Keyword(s):  
Air Quality ◽  
Numerical Analysis ◽  
Indoor Air Quality ◽  
Indoor Air ◽  
Three Dimensional ◽  
Cross Infection ◽  
School Students ◽  
Height Range ◽  
Air Ventilation ◽  
Ventilation Performance

For students, who spend most of their time in school classrooms, it is important to maintain indoor air quality (IAQ) to ensure a comfortable and healthy life. Recently, the ventilation performance for indoor air quality in elementary schools has emerged as an important social issue due to the increase in the number of days of continuous high concentrations of particulate matter. Three-dimensional numerical analysis has been introduced to evaluate the indoor airflow according to the installation location of return diffusers. Considering the possibility of the cross-infection of infectious diseases between students due to the direction of airflow in the classroom, the airflow angles of the average respiratory height range of elementary school students, between 1.0 and 1.5 m, are analyzed. Throughout the numerical analysis inside the classroom, it is found that the floor return system reduces the indoor horizontal airflow that causes cross-infection among students by 20% compared to the upper return systems. Air ventilation performance is also analyzed in detail using the results of numerical simulation, including streamlines, temperature and the age of air.

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