topic Thermal Simulation - Temperature-Dependent Internal Heat Initial Value in Fusion Design, Validate & Document Forum

Thermal Simulation - Temperature-Dependent Internal Heat Initial Value

Nickefth — Tue, 28 Nov 2017 19:54:36 GMT

Hey all,

I am running a pretty simple thermal simulation but my heat source (in the form of a temperature-dependent internal heat) is not working. When I run the simulation everything is just at room temperature. Details below.

- The model consists of a heater embedded in aluminum.

-The heater is temperature dependent (e.g. 50 watts at 0degC, 30 watts at 40degC, etc...). I have applied a temperature-dependent internal heat to the entire body.

-I have applied a convection load on the outer surfaces of the model.

-I have applied contacts between the heater and the aluminum (they are touching on all sides).

-I have applied a thermal contact conductance to all the contacts applied in the step above.

-All material thermal conductivities, specific heats, and densities have been specified.

When I run the simulation, there is no heat applied to the model and everything stays at room temperature. Is my internal heat not actually applying any power? At room temperature the heater is specified to have an internal heat of 50 watts, so it should be providing power. Has anyone had any issues with the temperature-dependent internal heat? Applying a constant internal heat or heat source works fine.

Overall I would say it looks like the simulation is just going through the motions without calculating my thermal loads. Any help would be appreciated.

Heater is below the surface shown.

Thanks,

Nicholas

Re: Thermal Simulation - Temperature-Dependent Internal Heat Initial Value

MikeSmell_ADSK — Fri, 01 Dec 2017 19:52:18 GMT

Hi @Nickefth -

Our development team has looked into this and found that it is an issue in the product and not your setup. Unfortunately, there is no work around at the moment. We will work on getting this resolved as soon as possible.

I am sorry for the inconvenience.

Thanks,

Mike Smell

Product Manager, Fusion 360 - Simulation

Re: Thermal Simulation - Temperature-Dependent Internal Heat Initial Value

Nickefth — Fri, 01 Dec 2017 19:55:05 GMT

Hey @MikeSmell_ADSK,

I appreciate the timely response. I've been working with technical support at Autodesk over email to try and resolve the issue. It is great to hear from an Autodesk employee with a definitive answer about the problem. The temperature-dependent source is a really useful tool, so hopefully it gets up and running soon.

Thanks you,

Nicholas