Ok ill do a practical experiment with this as there doesn't seem to be a simple equation for this.
Ill use 1/2 inch gap with a mirror finish steel plate to test it!
Thanks for your help
I have designed a machine and now I need to guard it with minimum space. The motor gets to about 100 degrees C so how far away does my steel mesh guard have to be to get to a safe working temperature????
The materials etc have already been specified so can not be changed. There is a 50% air...