[esp-r] Re: imaginary surface

[Paul Strachan]

Stefan,

Yes, you should assume the air is well mixed across the fictitious 
surface, so you could include a high ventilation exchange by specifying 
this in the operations file, or if you have a flow network, then you can 
have a large opening (low flow resistance) between the two zones.

Regards
Paul

Smith Stefan wrote:
> Dear Paul,
> Out of interest..
>  
> How would this effect fluid flow? Would you need to add some 
> ventilation operation to connect the zones? 
>  
> Regards,
> Stefan
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>    1.  imaginary surface (F. G. Azzaro)
>    2. Re: imaginary surface (paul strachan)
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> Message: 1
> Date: Mon, 14 Apr 2008 18:39:18 +0100
> From: "F. G. Azzaro" <azzarognu at gmail.com>
> Subject: [esp-r]  imaginary surface
> To: esp-r at lists.strath.ac.uk
> Message-ID:
>         <81f674a20804141039x33698fc6g309cec562d1d3500 at mail.gmail.com>
> Content-Type: text/plain; charset="iso-8859-1"
>
>  Hello ESP-r users,
> I have a question about the materials.
>  Is it possible to separate a big volume in different parts by 
> inserting an
> "imaginary" surface ?
> My objective is to analyze a big room in different parts, but I think, I
> need an "imaginary" surface to do that.
>  Do you have any suggestion ?, thanks
>
> Regards,
>
> Francesco
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> Message: 2
> Date: Mon, 14 Apr 2008 19:29:06 +0100
> From: paul strachan <paul at esru.strath.ac.uk>
> Subject: [esp-r] Re: imaginary surface
> To: "F. G. Azzaro" <azzarognu at gmail.com>,
>         "'esp-r at lists.strath.ac.uk'" <esp-r at lists.strath.ac.uk>
> Message-ID: <4803A272.3010503 at esru.strath.ac.uk>
> Content-Type: text/plain; charset=ISO-8859-1; format=flowed
>
> Dear Francesco,
>
> All zones must be fully bounded. Therefore, you should create a
> "fictitious" construction that will have minimal impact on the heat
> transfer. In essence you should have a thin layer which is very
> conductive, no appreciable thermal mass, perfectly transparent and no
> solar absorption.  Details can be found in the FAQ on the website under
> "fictitious surfaces and zone subdivision".
>
> Regards
> Paul
>
> F. G. Azzaro wrote:
> > Hello ESP-r users,
> > I have a question about the materials.
> > Is it possible to separate a big volume in different parts by
> > inserting an "imaginary" surface ?
> > My objective is to analyze a big room in different parts, but I think,
> > I need an "imaginary" surface to do that.
> > Do you have any suggestion ?, thanks
> >
> > Regards,
> >
> > Francesco
> > ------------------------------------------------------------------------
> >
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-- 
***************************************************************
Dr P A Strachan                   email: paul at esru.strath.ac.uk
ESRU, Dept. of Mechanical Eng.          phone: +44 141 548 2041
University of Strathclyde                 fax: +44 141 552 5105
Glasgow G1 1XJ, UK                 http://www.esru.strath.ac.uk
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