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Main >> Applications >> Sample problems >> Copper inductor with a steel tube

Copper inductor with a steel tube

induction heating simulation, copper inductor simulation, multiphysics analysis

A 2-turns copper inductor is used to heat the cylindrical steel part.

Problem Type
Axisymmetric multiphysics problem of AC magnetics coupled to Transient heat transfer.

Geometry
Copper inductor with a steel tube A 2-turns copper inductor is used to heat the cylindrical steel part. Steel pipe Inductor 95 mm Ø 50 mm

Given
Inductor current I = 1000 A;
Inductor frequency f = 22 kHz;
Relative permeability of air and copper μ = 1;
Relative permeability of steel μ = 400;
Electric conductivity of steel σ = 5000000 S/m;
Thermal conductivity of steel λ = 20 W/K*m;
Volume mass density of steel ρ = 7800 kg/m³;
Specific heat of steel C = 200 J/K*kg;

Task
Calculate the temperature distribution in the steel part after 10 seconds of heating.

Solution
Penetration depth in the steel part is less than 0.1 mm at this frequency. To get accurate results it is required to build very dense mesh on the surface of the steel part.

Results
Current density distribution in the steel part
Induction heating simulation: Current density distribution

Temperature distribution in the steel part
Induction heating simulation: Temperature distribution

See the Inductor_magn.pbm and inductor_heat.pbm problems for the magnetic and thermal analysis respectively.

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