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Modeling of Induction Heating with A Computational Fluid Dynamics Package
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RAC is a Mechanical Engineer, Heat Transfer Fluid Mechanics Consultant with world-class expertise in heat transfer, fluid mechanics, mass transfer analyses, basic structural analysis, specialization in computer systems and analysis/design of thermal systems
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Induction heating is a common techniques used to heat metals in the materials processing industry. The phenomenon is a surface heating effect - heating the surface of a material to melt metals. The material could be a crucible, or chunks of metal itself. It is often necessary to troubleshoot or optimize a process that uses induction heating. Figure 1 below shows a typical setup for an induction skull melter (ISM). These crucibles are segmented copper sections with water or other fluids used as a cooling fluid. The coupling between the induction heating and the cooling fluid flow determines how much metal is melted, solidified into a "skull," and ultimately available for a casting operation.
A modeling technique was developed as part of a commercial fluid dynamics package to allow a coupled analysis of the induction heating, heat transfer, and fluid mechanics by one unified software package.
Figure 1 - Typical Induction Heating Configuration.
Figure 2 - Symmetry Section of Representative Axisymmetric Geometry (bottom of figure represents centerline, r=0, of geometry).
Figure 2 shows a simple geometry used to test the methodology. The coils are individually represented and the crucible is not considered to couple with the coils (segmented crucible). The heating will occur on the surface of the metal within the crucible.
Figure 3 - Typical Surface Heating Results for a Crucible.
Figure 3 shows the high heat generation rates near the surface of the melt region as shown above. The peak heating rate occurs on the surface of the melt at the top edge - the interface between the melt region and the zone defined as "inspace."
Read other articles by this KKAI Associate:
Parametric Study of a Thermosyphon
Modeling of Injection Casting Process
The Design of A Freezing Point Measurement System
Designing a Phase Change Material Heat Exchanger for Electronic Enclosures
| Mechanical Engineer, Heat Transfer Fluid Mechanics Consultant, heat transfer, fluid mechanics, mass transfer analyses, basic structural analysis, specialization in computer systems and analysis/design of thermal systems | |
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