[Radiance-general] Modeling printed glass with dielectric material

[Greg Ward]

Hi Francesco,

Your posting arrived twice -- were you not sure that it was posted  
the first time?  You can always double-check at radiance-online,  
since the archives are always current.

The "interface" type is what you are looking for, I believe, since it  
allows you to specify the dielectric constant on either side of a  
boundary.  Modeling materials at this level of detail requires that  
you know very precise things about the geometry and physical properties.

It is OK to have some sides of a dielectric capped by an opaque  
material, such as plastic.  If you have no cap, just an opening, then  
the results will not be correct.

Best,
-Greg

> From: francesco.frontini at polimi.it
> Date: June 23, 2008 6:29:24 AM PDT
>
> Dear all,
>
> I have a question concerning dielectric and how to model correctly
> printed stripe (fritted glass) on a surface of dielectric material.
>
> According to the reference manual, " Ordinary dielectrics are  
> surrounded by a vacuum". But in my case, the transition between the  
> dielectric and the print color is different to the transition from  
> dielectric to vacuum. And since I'll have the printed stripes on  
> different layers, the difference is significant.
>
> My purpose is to simulate with Radiance a laminated glass with fritted
> stripes on the surface in-between the two laminated glass sheets. I  
> want to check the view to the outside and the transmission of such  
> fritted glass.
>
> I already modeled the stripe as a plastic surface with a very small  
> gap
> between the two panes of glass. But I obtained wrong result because  
> of the air gap between the stripe and the dielectric (glass) panes.
>
> Any idea how to model this correctly?
>
> What happens, if the dielectric is not completely "boxed", but  
> parts of the "box" replaced by plastic material?
>
> Thanks in advance
>
>
> Francesco Frontini