Doctoral Dissertations

Title

Heat and mass transfer in the gas metal arc welding process

Author

Junling Hu

Keywords and Phrases

Metal transfer; Arc plasma; Weld pool

Abstract

"This dissertation presents a unified mathematical model which can be used to simulate the heat and mass transfer during the gas metal arc welding process. An interactive numerical method has been developed to calculate the complex transport phenomena occurring during the transient coupling between the arc plasma and the metal domain. The droplet is treated as an internal obstacle while the arc plasma transport phenomena are calculated, and conversely the calculated arc plasma velocity and temperature are employed as the boundary conditions for the iteration and calculation of the metal domain. The shape and size of the droplet is determined by the balance between electromagnetic force, arc pressure, plasma shear stress, and surface tension. The Volume of Fluid (VOF) method is used to handle the free surfaces of the droplet and the weld pool. The predicted trends, such as the arc plasma distribution, the droplet flight trajectories and droplet velocities, are generally in agreement with published data. The modeling results are presented in three parts"--Abstract, leaf iv.

Department(s)

Mechanical and Aerospace Engineering

Degree Name

Ph. D. in Mechanical Engineering

Publisher

University of Missouri--Rolla

Publication Date

Spring 2005

Journal article titles appearing in thesis/dissertation

  • Heat and mass transfer in gas metal arc welding part I: the arc
  • Heat and mass transfer in gas metal arc welding part II: the metal
  • Metal transfer in gas metal arc welding

Pagination

xi, 129 leaves

Note about bibliography

Includes bibliographical references.

Rights

© 2005 Junling Hu, All rights reserved.

Document Type

Dissertation - Citation

File Type

text

Language

English

Library of Congress Subject Headings

Gas metal arc welding
Heat -- Transmission

Thesis Number

T 8715

Print OCLC #

70997983

Link to Catalog Record

Full-text not available: Request this publication directly from Missouri S&T Library or contact your local library.

http://laurel.lso.missouri.edu/record=b5626384~S5

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