wall emissivity for radiation problem: emitter is also receiving when it shouldn't -- CFD Online Discussion Forums

November 10, 2008, 09:24	wall emissivity for radiation problem: emitter is also receiving when it shouldn't	#1
Young Guest Posts: n/a	Dear all, I'm simulating a DO radiation model. It is simple, I just put a ball inside a cubic, set the ball temperature to 1000K and internal emissivity to 1. The cubic surfaces have a 0K temperature and internal emissivity also as 1. So according to the rules, all the radiation by the ball inside will be absorbed by the cubic surfaces. So the ball should only have a radiation out. However, after the simulation, I found ball also receive radiations. Not sure where the origin is. And as I changed the ball temperature, I found the received radiation is proportional to the radiation out. Could anyone help me out? Thanks ahead, Young

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