topic Re: Joule Heating HELP in CFD Forum

Joule Heating HELP

Anonymous — Thu, 17 Mar 2016 09:57:42 GMT

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,

Re: Joule Heating HELP

Jon.Wilde — Fri, 18 Mar 2016 10:57:34 GMT

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

Re: Joule Heating HELP

Anonymous — Sun, 20 Mar 2016 10:15:56 GMT

Hi,

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

Re: Joule Heating HELP

Jon.Wilde — Tue, 22 Mar 2016 20:00:23 GMT

Cool, thanks. Looking forward to hearing about it!

Re: Joule Heating HELP

Anonymous — Thu, 24 Mar 2016 07:08:07 GMT

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

Re: Joule Heating HELP

Jon.Wilde — Thu, 24 Mar 2016 07:42:20 GMT

Awesome! Thanks for the update 🙂