Picture of boy being examining by doctor at a tuberculosis sanatorium

Understanding our future through Open Access research about our past...

Strathprints makes available scholarly Open Access content by researchers in the Centre for the Social History of Health & Healthcare (CSHHH), based within the School of Humanities, and considered Scotland's leading centre for the history of health and medicine.

Research at CSHHH explores the modern world since 1800 in locations as diverse as the UK, Asia, Africa, North America, and Europe. Areas of specialism include contraception and sexuality; family health and medical services; occupational health and medicine; disability; the history of psychiatry; conflict and warfare; and, drugs, pharmaceuticals and intoxicants.

Explore the Open Access research of the Centre for the Social History of Health and Healthcare. Or explore all of Strathclyde's Open Access research...

Image: Heart of England NHS Foundation Trust. Wellcome Collection - CC-BY.

Modelling magnetohydrodynamics to investigate variation of shielding gases on arc characteristics in the GTAW process

Campbell, Stuart and Galloway, Alexander and McPherson, Norman and Camilleri, Duncan and Micallef, Daniel (2014) Modelling magnetohydrodynamics to investigate variation of shielding gases on arc characteristics in the GTAW process. In: International Conference on Materials and Product Technology, ICMPT14, 2014-08-07 - 2014-08-08, Loden Hotel.

[img] PDF (Campbell SW et al - Pure - Modelling magnetohydrodynamics to investigate variation of shielding gases on arc characteristics in the GTAW process Jun 2014)
Campbell_SW_et_al_Pure_Modelling_magnetohydrodynamics_to_investigate_variation_of_shielding_gases_on_arc_characteristics_in_the_GTAW_process_Jun_2014.pdf
Preprint

Download (102kB)

Abstract

Gas tungsten arc welding requires a gas shield to be present in order to protect the arc area from contamination by atmospheric gases. As a result of each gas having its own unique thermophysical properties, the shielding gas selected can have a major influence on the arc stability, welding speed, weld appearance and geometry, mechanical properties and fume generation. Alternating shielding gases is a relatively new method of discreetly supplying two different shielding gases to the welding region in order to take advantage of the beneficial properties of each gas, as well as the inherent pulsing effects generated. As part of an ongoing process to fully evaluate the effects of this novel supply method, a computational fluid dynamics model has been generated to include the gas dependent thermodynamic and transport properties in order to evaluate the effects that an alternating gas supply has on the arc plasma. Experimental trials have also been conducted to validate the model arc profile predictions.