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atwhaley / cfast

Automatically exported from code.google.com/p/cfast
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Target temperatures fall below ambient #42

Closed GoogleCodeExporter closed 9 years ago

GoogleCodeExporter commented 9 years ago 
What steps will reproduce the problem?
1. Attached test case has a target in a room without a fire locate on a 
wall surface. 

What is the expected output? What do you see instead?
Observed target temperature goes down below ambient temeprature before 
recovering.  It should never be possible for a target temperature to be 
below the ambient temperature

Original issue reported on code.google.com by cfastdev@gmail.com on 5 Jun 2009 at 11:42

Attachments:

GoogleCodeExporter commented 9 years ago 
When target is located on a wall, back side gas radiation is not included so in 
effect, the back side is exposed to absolute zero, hence the cooling.  Fix is 
to add 
a sigma x t_ambient^4 to backside gas radiation if target is located on a wall. 
Fixed in revision 168.

Original comment by cfastdev@gmail.com on 5 Jun 2009 at 11:44