Problems with S2S-Radiation Model

TLH · July 16, 2012, 05:13

Hello,

I'm working on an Temperature-Calculation of an Multi-Region-Problem (some solids and fluid areas). As boundary conditions are temperatures form -104°C to 30 °C given. A part of the task is to investigate the influence of thermal radiation (which I think is not so big).

So I build my model (1 mesh continuum / Polyhedral with embedded thin mesher). The first solutions works very well. The residuas converges and the temperaturas sounds very realistical.

After that I implemented the S2S-Radiation model for the fluid regions. So the Energie-balance doesn't converge (see picture) and the temperature rises at some points over 60°C.

Does anybody have an idea whats wrong with my model?

I have already limit the temperatures and start iteration without radiation and then switched radiation on.

ssixr · June 11, 2013, 14:47

hi TLH,
could you explain how you activated S2S model for fluid domain?

July 16, 2012, 05:13	Problems with S2S-Radiation Model	#1
TLH New Member Join Date: Jul 2012 Posts: 1 Rep Power: 0	Hello, I'm working on an Temperature-Calculation of an Multi-Region-Problem (some solids and fluid areas). As boundary conditions are temperatures form -104°C to 30 °C given. A part of the task is to investigate the influence of thermal radiation (which I think is not so big). So I build my model (1 mesh continuum / Polyhedral with embedded thin mesher). The first solutions works very well. The residuas converges and the temperaturas sounds very realistical. After that I implemented the S2S-Radiation model for the fluid regions. So the Energie-balance doesn't converge (see picture) and the temperature rises at some points over 60°C. Does anybody have an idea whats wrong with my model? I have already limit the temperatures and start iteration without radiation and then switched radiation on. wond likes this.

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June 11, 2013, 14:47		#2
ssixr Member sudhir Join Date: Mar 2009 Location: india Posts: 65 Rep Power: 17	hi TLH, could you explain how you activated S2S model for fluid domain?