Dear Eli,

With zero flow rate, you have only radiation.

The increasing of the flow rate is increasing the air/gas convection and more air/ gas molecules (with heat capacity) flow and cool or heat the substrate.

So you will get radiation and convection in the same time.



Best Regards



Reuven ROKAH

Pls Think green before printing this mail... Thanks



-----Original Message-----

From: TechNet [mailto:[log in to unmask]] On Behalf Of Eli Sarig

Sent: Wednesday, August 27, 2008 10:24 PM

To: [log in to unmask]

Subject: [TN] Question about heat transfer



My question is related to the heat transfer at the cooling zones. I want to

reduce the substrate temperature from 200º C to 100ºC; can you explain the

relationship between the flowing air temperature and the flow rate? What is

more important: the temperature of the air or the flow rate?

Thanks,

Eli.



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