calc Tr of aluminum object?

[justDIY]

Is there a way to calculate the thermal resistance of an aluminum object?

I have these cool bowls made from cast aluminum. they're about 1/8" thick material, and about 4" square and 1.5" deep.

i'd like to just get a rough ballpark to see if further testing is feasable (which may otherwise deface the bowl) or if it's a non starter

here's the object in question

https://projects.dimension-x.net/pictures/albowl/topdown.jpg

 

[stevez]

It is possible to estimate the thermal performance - estimate suggests a level of inaccuracy. It's also possible to more accurately calculate the thermal performance. The "estimate" takes some work - the calculation quite a bit more and/or some fairly expensive software.

It might be simpler to experiment to see how it performs. How much effort should be applied is likely determined by your specific needs.

 

[justDIY]

the object in the bowl is a 9 watt rgb star, so thats how much heat I'm dealing with. Junction temp not to exceed 85C. Lumileds claims I need a Tr of 11 ... but my math says 7.