- #1
whatdoido
- 48
- 2
I'm (self)studying the physics of heat transfer at the moment. My book gives a relationship between heat transfer rate and thermal resistance as ##\phi=\frac {A \Delta T} {R}##. My book is not in English, so hopefully that is not the cause of this misunderstanding. I double checked that heat flow rate means the same as in my native language. Heat flow rate can be also marked as ##q## and ##Q## I think since I saw both being used in different places.
When I read about thermal resistance from other sources in the internet I ran across this equation ##\phi=\frac {\Delta T} {R}##. I give a specific source: http://web2.clarkson.edu/projects/subramanian/ch330/notes/Conduction in the Cylindrical Geometry.pdf
The heat flow rate of cylinder is defined the same as in my book, but the relationship between heat flow rate and resistance differ, since it does not include area in it. Well maybe I mixed heat flow rate with heat flux? Then it would not make sense that cylinder's heat flow rate matches with the one in my book. Something I'm not understanding correctly, so any help would be much appreciated.
When I read about thermal resistance from other sources in the internet I ran across this equation ##\phi=\frac {\Delta T} {R}##. I give a specific source: http://web2.clarkson.edu/projects/subramanian/ch330/notes/Conduction in the Cylindrical Geometry.pdf
The heat flow rate of cylinder is defined the same as in my book, but the relationship between heat flow rate and resistance differ, since it does not include area in it. Well maybe I mixed heat flow rate with heat flux? Then it would not make sense that cylinder's heat flow rate matches with the one in my book. Something I'm not understanding correctly, so any help would be much appreciated.