Joule Heating HELP

[Anonymous]

Hi

I'm trying to simulate heating steel in copper coil while steel moves.But coil can not heating steel and I've got too high temperature .

What are your suggestions?

Best regards,

[Jon.Wilde · Accepted solution]

Hi,

I took a look at your model and I see that to start with, it is over constrained.

If you have flow in and out, you need only three boundary conditions.

Inlet

Velocity and Temperature

Outlet 

Pressure

Remove everything else. 

You also need to avoid using internal boundary conditions unless you suppress the part they are attached to. 

The joule heating ones can stay though, they are the only exception.

Parts with Joule Heating applied need a really good mesh. Give the coil a uniform mesh and make sure there are about 5 elements through the thickness as a starting point.

If you are running transiently you need to have Initial Temperature Conditions applied to every volume, or CFD has no starting point.

Run steady state flow only first and then heat transfer only as a transient analysis based on these results. Better than trying to get CFD to converge on flow transiently, which is harder to do.

Use Advection Scheme 5 and make sure Intelligent Solution Control is on for the flow section of your analysis.

You really need longer inlets and outlets too, about 5x longer.

That ought to get this working.

Could you let us know and also provide details on what temperatures you are expecting vs what you are seeing? Then we know what we are aiming for.

Thanks,

Jon

[Anonymous]

Hi, 

Thank you for your  reply. I will try and I will write the results here.
regards

[Jon.Wilde]

Cool, thanks. Looking forward to hearing about it!

[Anonymous]

Your advise is very helpful. My problem is highly solved.

[Jon.Wilde]

Awesome! Thanks for the update 🙂