The influence of iron vapour on an argon transferred arc

Gonzalez, Jean‐Jacques; Bouaziz, M.; Razafinimanana, Manitra; Gleizes, Alain

doi:10.1088/0963-0252/6/1/004

Cited by 31 publications

(27 citation statements)

References 22 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…In addition, it is also necessary to include source terms in the momentum and energy equations reflecting the Lorentz force, the ohmic heating and the radiative cooling, in order to successfully simulate an electric arc. Previous works [3]- [6] not presented here, making a comparison between experimental results and the 2D model results allow to validate the developments in the plasma medium.…”

Section: Basis Of the Modelsmentioning

confidence: 93%

Theoretical study of hydrodynamic flow in thermal plasma devices

2006

View full text Add to dashboard Cite

In this paper we focus our discussion on thermal plasmas created by electric arc. Due to the electrons mobility, the energy transferred by Joule effect to the gas, leads to temperature around 10 000 K. Thermal plasmas are very used in numerous processes like spraying, cutting, welding, waste treatment and are also present in numerous situations such as in interruption systems: high and low voltage circuit breakers or in natural phenomena: lightning strike. In order to be improved, thermal plasma processes necessitate a better understanding of the medium. Numerical modeling is now largely used to analyze and to predict the behavior of arcs and hydrodynamic flows to improve thermal plasma processes. Due to the increase of computer performances and to the availability of commercial computational fluid dynamics codes, the 2D modeling mainly developed in the 80's and 90's have been progressively replaced for a few years by 3D models. But is there always a real interest to develop such kind of codes if we consider the increase of accuracy in comparison with the increase of CPU time and the level of the assumptions? In order to give some elements for the discussion, we compare in the first part two physical conditions: one based on the flow injection and the other on the arc attachment, using 2D and 3D models. The legitimacy of the 2D model in then studied. In the second part, we illustrate through example the necessity of the use of 3D models due to complexities in configurations. Finally the difficulty of the 3D models validation is underlined. : 52.30 1 Basis of the models In this paper, all the presented developments, in two dimensions (2D) and in three dimensions (3D), use the commercial code Fluent (V4.5) [1] based on the resolution of the electromagnetism and Navier-Stokes equations by the control volume method of Patankar [2]. The models allow describing the flow in term of the velocity components, and temperature fields. User-defined subroutines are added to the model to implement the extra transport equations. Subroutines are also modified to allow thermodynamic and transport properties to be functions of temperature, pressure and mass fraction. In addition, it is also necessary to include source terms in the momentum and energy equations reflecting the Lorentz force, the ohmic heating and the radiative cooling, in order to successfully simulate an electric arc. Previous works [3]-[6] not presented here, making a comparison between experimental results and the 2D model results allow to validate the developments in the plasma medium. PACS

show abstract

Section: Basis Of the Modelsmentioning

confidence: 93%

Theoretical study of hydrodynamic flow in thermal plasma devices

2006

View full text Add to dashboard Cite

show abstract

“…Gonzalez et al [63] performed measurements on a 90 A argon arc with an iron anode. The temperature was deduced from a Boltzmann diagram obtained using ten Fe I lines, and the iron concentration from the temperature and the absolute intensity of an Fe I line.…”

Section: Spectroscopic Measurements Of Gtaw Arcsmentioning

confidence: 99%

The effects of metal vapour in arc welding

Murphy¹

2010

J. Phys. D: Appl. Phys.

233

151

View full text Add to dashboard Cite

Metal vapour is formed in arc welding processes by the evaporation of molten metal in the weld pool, and in the case of gas-metal arc welding, in the wire electrode and droplets. The presence of metal vapour can have a major influence on the properties of the arc and the size and shape of the weld pool. Previous experimental and computational work on the production and transport of metal vapour in welding arcs, in particular those relevant to gas-metal arc welding and gas-tungsten arc welding, are reviewed. The influence of metal vapour on the thermodynamic, transport and radiative properties of plasmas is discussed. The effect of metal vapour on the distributions of temperature, current density and heat flux in arcs is examined in terms of these thermophysical properties. Different approaches to treating diffusion of metal vapour in plasmas, and the production of vapour from molten metal, are compared. The production of welding fume by the nucleation and subsequent condensation of metal vapour is considered. Recommendations are presented about subjects requiring further investigation, and the requirements for accurate computational modelling of welding arcs.

show abstract

“…Gonzalez użył podobnej metody w modelowaniu argonowego łuku GTAW z anodą z żelaza przy 90 A [63]. Przewidywane stężenie masy oparów wyniosło w tym przypadku jedynie 0,7% w odległości 1 mm ponad anodą, zmniejszając się do 0,2% w obszarze położonym 3 mm ponad nią.…”

Section: Modelowanie łUków W Spawaniu Gtawunclassified

Wpływ oparów metalicznych na spawanie łukowe - część 3: Modelowanie łuku spawalniczego – dymy spawalnicze

Murphy

2012

Przegląd Spawalnictwa

View full text Add to dashboard Cite

Anthony murphy Wpływ oparów metalicznych na spawanie łukowe, część 3: Modelowanie łuku spawalniczego-wyniki. dymy spawalnicze the effects of metal vapour in arc welding, part 3: Modelling of welding arc-results. welding fumes Streszczenie W tej części artykułu przedstawiono wyniki oraz przewidywania obliczeniowego modelowania łuków spawalniczych, a także wpływ oparów metalicznych na parametry łuku. Omówiono powstawanie pyłów wpływających na zdrowie spawacza. Podsumowanie artykułu może być przydatne do tworzenia oprogramowania procesora źródła do sterowania stabilnością łuku, funkcjami ułatwiającymi spawanie i korekty błędów spawacza (reklamowanych w Australii jako oprogramowanie urządzeń, myślących za spawacza) [198].

show abstract

The influence of iron vapour on an argon transferred arc

Cited by 31 publications

References 22 publications

Theoretical study of hydrodynamic flow in thermal plasma devices

Theoretical study of hydrodynamic flow in thermal plasma devices

The effects of metal vapour in arc welding

Wpływ oparów metalicznych na spawanie łukowe - część 3: Modelowanie łuku spawalniczego – dymy spawalnicze

Contact Info

Product

Resources

About