ABSTRACT
The charge and heat transfer from atmospheric pressure argon arc plasma to spherical metal particle is studied numerically. The particles of the radius https://www.w3.org/1998/Math/MathML" display="inline"> 10 − 5 https://www.w3.org/1999/xlink" xlink:href="https://s3-euw1-ap-pe-df-pch-content-public-p.s3.eu-west-1.amazonaws.com/9781003518518/73fa2153-614b-41a8-bceb-2db236c8432f/content/inline-math27_1.tif"/> … https://www.w3.org/1998/Math/MathML" display="inline"> 10 − 4 https://www.w3.org/1999/xlink" xlink:href="https://s3-euw1-ap-pe-df-pch-content-public-p.s3.eu-west-1.amazonaws.com/9781003518518/73fa2153-614b-41a8-bceb-2db236c8432f/content/inline-math27_2.tif"/> m and https://www.w3.org/1998/Math/MathML" display="inline"> 10 − 3 https://www.w3.org/1999/xlink" xlink:href="https://s3-euw1-ap-pe-df-pch-content-public-p.s3.eu-west-1.amazonaws.com/9781003518518/73fa2153-614b-41a8-bceb-2db236c8432f/content/inline-math27_3.tif"/> m are considered that corresponds to particles of additive material in plasma transferred arc (PTA) surfacing and droplets of electrode metal in gas metal arc (GMA) welding, respectively. The plasma is described in hydrodynamic approach with account for its thermal and ionization non-equilibrium near the particle. The hydrodynamic equations are formulated for quasi-neutral plasma, i.e. outside the sheath near the particle surface. In our study, the current density in plasma is https://www.w3.org/1998/Math/MathML" display="inline"> j 0 = 10 7 https://www.w3.org/1999/xlink" xlink:href="https://s3-euw1-ap-pe-df-pch-content-public-p.s3.eu-west-1.amazonaws.com/9781003518518/73fa2153-614b-41a8-bceb-2db236c8432f/content/inline-math27_4.tif"/> A/m2 that heats the argon plasma to about 15500 K. The electric current flowing through the particle in the arc plasma was found. The various components of the heat flux transferred to the particle in the arc plasma are found.
