Modeling of fluid flow and heat transfer in the plasma region of the dc electric arc furnace |
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| Authors: | F Qian B Farouk R Mutharasan |
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| Affiliation: | (1) Mechanical Engineering and Mechanics Department, Drexel University, 19104 Philadelphia, PA;(2) Chemical Engineering Department, Drexel University, 19104 Philadelphia, PA |
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| Abstract: | A mathematical model describing the transport processes in the plasma arc in dc electric arc furnaces has been developed.
The equations of conservation of mass, momentum, and energy are solved numerically in conjunction with Maxwell's equations
of the electromagnetic field to calculate the velocity and temperature distributions in the plasma region. The heat transfer
from the arc to a rigid anode surface is calculated. The model is applied to obtain quantitative results on the relative importance
of the various modes of heat transfer from the electric arc to the anode surface. Computational results were obtained for
varying arc current magnitudes and anode-cathode distances. The model predicts higher arc jet velocity and a broader arc core
at higher arc current. The shorter arc length is more efficient for transferring heat to the anode. |
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