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Heat Transfer Mechanisms in Arcs of Various Gases at Atmospheric Pressure by Rodrigo Villarreal-Medina; Anthony B. Murphy; Patricio F. Méndez; Marco A. Ramírez-Argáez is a Engineering article available to read on EtoBox.
What is Heat Transfer Mechanisms in Arcs of Various Gases at Atmospheric Pressure about?
Abstract This work expands findings about the dominant heat transfer mechanisms in argon and helium arcs at atmospheric pressure for monoatomic (Ar, He, 50% Ar–50% He), diatomic (air, $${\hbox{N}}_{2}$$ N 2 , $${\hbox{O}}_{2}$$ O 2 , $${\hbox{F}}_{2}$$ F 2 , $${\hbox{Cl}}_{2}$$ Cl 2 ), and triatomic ($${\hbox{CO}}_{2}$$ CO 2 ) gases. The objective is to understand the dominant mechanisms in atmospheric plasmas through validated numerical modeling for GTAW welding process. Arcs of all gases have lengths of 10 mm and 200 A current. Five heat transfer mechanisms are considered: Joule heating, convection, radiation, conduction, and Thomson effect. Results indicate that the general structure of the arcs and dominant mechanisms are qualitatively similar for all gases; sizes change depending on the gas. The dominant energy input near the cathode is Joule heating, while that near the anode is convection. The dominant energy output always follows the same sequence: Thomson effect next to the cathode followed by convection, radiation in the arc column, and conduction near the anode. Joule heating is the most significant in Ar, while in He, it has the lowest significance. This is due to diffe
Who reads Heat Transfer Mechanisms in Arcs of Various Gases at Atmospheric Pressure?
It is typically read by researchers, students, and practitioners in Engineering.
- Author
- Rodrigo Villarreal-Medina; Anthony B. Murphy; Patricio F. Méndez; Marco A. Ramírez-Argáez
- Publisher
- Springer Science and Business Media LLC
- Published
- 2023
- Language
- EN
- Field
- Engineering (Physical Sciences)