[esp-r] Re: how to define the "null surface"?

[Hall Monika]

Hi Qiu,

You can create a fictitious surface with "no" mass, high transmission and "no" absorption

Optics.db
tran_fictit   :fictitious surface
# def lyr, tmc lyr, vis trn, sol refl, sol absor, U val
  1   1  0.990  0.001  0.001  9.000
# direct trn @ 5 angles, total heat gain @ 5 angles
  0.990 0.990 0.990 0.990 0.990 0.990 0.990 0.990 0.990 0.990
# refr index, absorption @ 5 angles for each tmc layer
  1.000 0.001 0.001 0.001 0.001 0.001


Construction.db
# layers  description   optics name   symmetry tag
    1    fictit        TRAN  tran_fictit   SYMMETRIC     
# mat ref thickness (m) mat descr & air gap R
  383    0.0010  fictitious


Material.db 
  xxx   fictitious
      20.000,    10.000,    10.000,  0.990,  0.010,  19200.000



Best regards
 
Monika 
-----Original Message-----
From: esp-r-bounces at lists.strath.ac.uk [mailto:esp-r-bounces at lists.strath.ac.uk] On Behalf Of Dr.QIU
Sent: Monday, March 10, 2008 9:48 AM
To: esp-r
Subject: [esp-r] how to define the "null surface"?

Dear all,

 I want to perform thermal simulation. In my geometry model, one zone has a "null surface", which locates at the up/downstair hole between two floors. how to define the construction attribute for this "null surface"?

thank you in advance.
Qiu		

　　　　　　　
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