Heat transfer and fluid flow in the welding arc

McKelliget, J.; Szekely, J.

doi:10.1007/bf02665312

Cited by 86 publications

(66 citation statements)

References 9 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…In earlier work, Jordan et al 12) tried to understand the behavior of high-power arcs by measuring (using a photographic approach) the arc shapes. Recently, Mendez et al 14) developed a novel asymptotic technique based on the order of magnitude method. Using their technique, they were able to describe the principal forces driving the plasma jet and they were able to give some of the arc characteristics with simple algebraic expressions for arcs found in welding arc processes.…”

Section: Introductionmentioning

confidence: 99%

Mathematical Modeling of a DC Electric Arc-Dimensionless Representation of a DC Arc

Ramírez

Trápaga

2003

ISIJ International

View full text Add to dashboard Cite

A mathematical model presented in previous publications is used to describe fluid flow, heat transfer and electromagnetic phenomena in the arc region of a Direct Current Electric Arc Furnace (DC-EAF). The effects of the arc current and the arc length on the arc characteristics and arc bath interactions are analyzed in a rather generalized way. This analysis leads to the conclusion that the arc behaves in such a way that when the arc shape (defined with the location of the 10 000 K isotherm) is plotted in the appropriate dimensionless form a unique arc expansion is achieved. This unique expansion (only restricted to arcs burned between graphite electrodes in air and outside the region where the arc jet impinges on the bath surface) gives the possibility to provide single dimensionless arc characteristics regardless the values of the arc current and arc length. These dimensionless correlations represent the main finding of this work and they allow means to estimate the important characteristics of the arc under different operational conditions without the need to run complex numerical calculation. The dimensionless characteristics of arc expressed in simple algebraic forms can be used for this purpose employing a pocket calculator.

show abstract

Section: Introductionmentioning

confidence: 99%

Mathematical Modeling of a DC Electric Arc-Dimensionless Representation of a DC Arc

Ramírez

Trápaga

2003

ISIJ International

View full text Add to dashboard Cite

show abstract

“…In this model, the arc is treated as a fluid 5,[11][12][13][14][15] with temperature-dependent properties. [16][17] The coupled equations for conservation of energy, mass and momentum, which define the plasma temperature, pressure and velocity are solved.…”

Section: The Modeling Of the Arcmentioning

confidence: 99%

“…To achieve this the use of CFD models has become increasingly popular. Arcs have been modeled [1][2][3][4][5] and models of inductively stirred steel ladles have been created. [6][7][8][9][10] However, no models have been reported as being able to predict the transient effect of heating by electrodes during induction stirring.…”

Section: Introductionmentioning

confidence: 99%

Heating and Electromagnetic Stirring in a Ladle Furnace. A Simulation Model.

2000

View full text Add to dashboard Cite

A three-dimensional simulation model coupling heating and induction stirring in an ASEA-SKF ladle furnace was developed. Data of the heat transfer from the arcs to the steel bath were predicted in a separate model and included as boundary conditions in a ladle model. The arc model considers the contributions of heat transferred by of each of the following mechanisms: radiation, convection, condensation and energy transported by electrons. Predictions were made to simulate the change of temperature distribution in the ladle during simultaneous heating with electrodes and stirring by induction. A first attempt was made to compare the predictions with measured temperatures from a 100 t ASEA-SKF ladle. The agreement was found to be fairly good when heat-flux data for a 25 cm arc length were used as input to the ladle model. This indicates that the model can be used for more in-depth studies of the effects of heating for ladles that are inductively stirred.

show abstract

“…Many models have been developed to model the heat transfer and fluid flow in the arc plasma for both GTAW [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18] and GMAW [19][20][21][22][23][24]. Mckelliget and Szekely [1], Choo et al [2] and Goodarzi et al [3] have simulated the arc column by assuming the current density distribution at the cathode surface in GTAW.…”

Section: Introductionmentioning

confidence: 99%

“…Mckelliget and Szekely [1], Choo et al [2] and Goodarzi et al [3] have simulated the arc column by assuming the current density distribution at the cathode surface in GTAW. Fan et al [4][5] used fixed temperature boundary condition at the cathode tip to calculate the arc column in GTAW.…”

Section: Introductionmentioning

confidence: 99%

Numerical Modeling Of GMAW ARC

Tsai

Wang

Advances in Computer, Information, and Systems Sciences, and Engineering

View full text Add to dashboard Cite

A comprehensive model has been developed to simulate the transient, coupled transport phenomena occurring during a gas metal arc welding process. This includes the arc plasma; melting of the electrode; droplet formation, detachment, transfer, and impingement onto the workpiece; and weld pool fluid flow and dynamics. The fluid flow and heat transfer in both the arc and the metal were simulated and coupled through the boundary conditions at the arc-metal interface at each time step. The detached droplet in the arc and the deformed weld pool surface were found to cause significant changes in the distributions of arc temperature and arc pressure, which are usually assumed to have Gaussian distributions at the workpiece surface. The comprehensive model could provide more realistic boundary conditions to calculate the heat transfer and fluid flow both in the plasma and the metal. The predicted arc plasma distribution, droplet flight trajectory, droplet acceleration and final weld bead shape compared favorably with the published experimental results. This paper was to present the heat transfer and fluid flow in the arc plasma.

show abstract

Heat transfer and fluid flow in the welding arc

Cited by 86 publications

References 9 publications

Mathematical Modeling of a DC Electric Arc-Dimensionless Representation of a DC Arc

Mathematical Modeling of a DC Electric Arc-Dimensionless Representation of a DC Arc

Heating and Electromagnetic Stirring in a Ladle Furnace. A Simulation Model.

Numerical Modeling Of GMAW ARC

Contact Info

Product

Resources

About