Numerical Simulation of Downstream Kinetics of an Atmospheric Pressure Nitrogen Plasma Jet Using Laminar, Modified Laminar, and Turbulent Models

2013 ◽  
Vol 33 (6) ◽  
pp. 1121-1135 ◽  
Author(s):  
Jheng-Han Tsai ◽  
Chun-Ming Hsu ◽  
Cheng-Che Hsu
Keyword(s):  
Numerical Simulation ◽  
Atmospheric Pressure ◽  
Plasma Jet ◽  
Nitrogen Plasma ◽  
Turbulent Models ◽  
Kinetics Of

scholarly journals Thermal behavior of ceramic particles in a gaseous medium at high temperature

2020 ◽  
Vol 307 ◽  
pp. 01056
Author(s):  
Abderrahmane AISSA ◽  
Abdel-Nour ZAIM ◽  
M SAHNOUN ◽  
Redouane FARES ◽  
M ABDELOUHAB ◽  
...  
Keyword(s):  
Numerical Simulation ◽  
Spherical Particle ◽  
Atmospheric Pressure ◽  
Computational Analysis ◽  
Gaseous Medium ◽  
Plasma Jet ◽  
Spray Process ◽  
Plasma Spray Process ◽  
Proposed Model ◽  
Computational Fluid Dynamics Cfd

Numerical simulation of the interaction between the spherical particle and plasma gas is carried out. The aim of this study is to investigatethermal transfer between the plasma gas and solid particle during the plasma spray process and to validate the well-known empirical correlation of the Ranz and Marshall. In the conditions of molten or semi-molten states of prepared substrate, the medium (plasma jet) can affect the high velocities of particles. On the basis of direct numerical simulation, the computational analysis has been carried out by using computational fluid dynamics (CFD) of heat transfer in atmospheric pressure and mid-temperature range (3000k–12000k) of a plasma flow over a spherical particle. Our proposed model improves correlation with experiments compared to the existing approaches in the literature.

scholarly journals Development of Organosilicon-Based Superhydrophobic Coatings through Atmospheric Pressure Plasma Polymerization of HMDSO in Nitrogen Plasma

Materials ◽  
2019 ◽  
Vol 12 (2) ◽  
pp. 219 ◽  
Author(s):  
Siavash Asadollahi ◽  
Jacopo Profili ◽  
Masoud Farzaneh ◽  
Luc Stafford
Keyword(s):  
Contact Angle ◽  
Atmospheric Pressure ◽  
Plasma Polymerization ◽  
Atmospheric Pressure Plasma ◽  
Plasma Jet ◽  
Nitrogen Plasma ◽  
Superhydrophobic Surfaces ◽  
Atmospheric Pressure Plasma Jet ◽  
Pressure Plasma ◽  
Superhydrophobic Coatings

Water-repellent surfaces, often referred to as superhydrophobic surfaces, have found numerous potential applications in several industries. However, the synthesis of stable superhydrophobic surfaces through economical and practical processes remains a challenge. In the present work, we report on the development of an organosilicon-based superhydrophobic coating using an atmospheric-pressure plasma jet with an emphasis on precursor fragmentation dynamics as a function of power and precursor flow rate. The plasma jet is initially modified with a quartz tube to limit the diffusion of oxygen from the ambient air into the discharge zone. Then, superhydrophobic coatings are developed on a pre-treated microporous aluminum-6061 substrate through plasma polymerization of HMDSO in the confined atmospheric pressure plasma jet operating in nitrogen plasma. All surfaces presented here are superhydrophobic with a static contact angle higher than 150° and contact angle hysteresis lower than 6°. It is shown that increasing the plasma power leads to a higher oxide content in the coating, which can be correlated to higher precursor fragmentation, thus reducing the hydrophobic behavior of the surface. Furthermore, increasing the precursor flow rate led to higher deposition and lower precursor fragmentation, leading to a more organic coating compared to other cases.

Numerical simulation of an atmospheric pressure plasma jet with coaxial shielding gas

2020 ◽  
Vol 54 (7) ◽  
pp. 075205
Author(s):  
Peng Lin ◽  
Jiao Zhang ◽  
Tam Nguyen ◽  
Vincent M Donnelly ◽  
Demetre J Economou
Keyword(s):  
Numerical Simulation ◽  
Atmospheric Pressure ◽  
Atmospheric Pressure Plasma ◽  
Plasma Jet ◽  
Atmospheric Pressure Plasma Jet ◽  
Shielding Gas ◽  
Pressure Plasma

scholarly journals Cold Atmospheric Pressure Nitrogen Plasma Jet for Enhancement Germination of Wheat Seeds

2019 ◽  
Vol 39 (4) ◽  
pp. 897-912 ◽  
Author(s):  
Khaled Lotfy ◽  
Nadi Awad Al-Harbi ◽  
Hany Abd El-Raheem
Keyword(s):  
Atmospheric Pressure ◽  
Plasma Jet ◽  
Nitrogen Plasma ◽  
Wheat Seeds
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