[esp-r] Re: CFD problem

[Achim Geissler]

Dear Nalin

"standalone" and "conflation with air flow network" are, I think, mutually exclusive.

Regards
Achim


-----Original Message-----
From: NALIN SWAROOP [mailto:nalin_swaroop at iitb.ac.in] 
Sent: Mittwoch, 6. Mai 2009 12:45
To: Achim Geissler
Cc: esp-r at lists.strath.ac.uk
Subject: RE: [esp-r] Re: CFD problem

Dear Achim

The CFD definition file that you have sent me is not running in the
standalone esp-r/cfd simulator(dfs module).and is giveing the error that
connections are not found and conflated network with 0 nodes 0 connections
and 0 components will be used.
prj still hangs if I try to do any editing.

Sincerely
Nalin







> Dear Nalin
>
> attached is your model in a configuration in which the air flow network to
> CFD conflation seems to be working (the thermal conflation is giving
> "Error: Invalid BC type" warnings, though). However, as you, I had the
> error messages you give. Additionally, prj hung at the message. A look at
> the source seems to imply that this message should not really happen at
> this point and should surely not hang prj. Maybe somebody on the list that
> has programmed in the CFD module can take a look.
>
> The CFD is quite finicky in regard to convergence. At the beginning of the
> run, you may have to accept unconverged solutions as converged a few
> times. Having the large openings open to the exterior also leads to
> problems every few hours.
>
> The entry for air flow network conflation in the .dfs file was done by
> hand.
>
> Best regards
> Achim
>
>
>
> -----Original Message-----
> From: esp-r-bounces at lists.strath.ac.uk
> [mailto:esp-r-bounces at lists.strath.ac.uk] On Behalf Of NALIN SWAROOP
> Sent: Montag, 4. Mai 2009 12:21
> To: Hall,Monika
> Cc: Aizaz Samuel; esp-r at lists.strath.ac.uk
> Subject: [esp-r] Re: CFD problem
>
> Dear Monika
>
> The problem is not with the walls, I have conflated the CFD defined walls
> with the construction Walls and it works fine but if I try to conflate the
> openings with the network flow connection it gives the error "cells are
> not compatible with chosen face please redefine" I have again attached the
> CFD definition file the lines which define the airflow are not changed
> because ESP-r gives the above mentioned error.
>
> Regards
>
> Nalin
>
>
>
>
>
>
>
>> Dear Nalin,
>>
>> Did you have tried a conflation of the walls like that?
>>
>> # Solid boundary conditions.
>> *solids
>> Wall3        Temp  25.00   | Confl   4  wallx
>> Wall4        Temp  25.00   | Confl   3  wally
>> Wall5        Temp  25.00   | Confl   11  wallz
>>
>>
>> The walls created in cfd must related to the walls in the zone-model:
>> p.e.
>> wallx, wally and wallz
>> But I don`t know  what are the numbers 4, 3, 11 for.
>>
>> Regards
>> Monika
>>
>>
>> -----Ursprüngliche Nachricht-----
>> Von: esp-r-bounces at lists.strath.ac.uk
>> [mailto:esp-r-bounces at lists.strath.ac.uk] Im Auftrag von NALIN SWAROOP
>> Gesendet: Montag, 4. Mai 2009 08:39
>> An: Aizaz Samuel
>> Cc: esp-r at lists.strath.ac.uk
>> Betreff: [esp-r] Re: CFD problem
>>
>> I changed the lines
>>
>> Open1        Whole    6  25   1   1  11  20
>> Open2        Whole    6  25  25  25  11  20
>>  to:
>> Open1        South    6  25   1   1  11  20
>> Open2        North    6  25  25  25  11  20
>>
>> and now grid error is not coming but still I am not able to do the CFD
>> and air flow network conflation every time I try to define the
>> boundary condition for open1 or open2 and choose the connections from
>> network flow it gives the error that "cells are not compatible with
>> chosen face please redefine"
>>
>> Please help
>>
>> Nalin
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>> Nalin,
>>>
>>> In the cfd file change the following lines:
>>> Open1        Whole    6  25   1   1  11  20
>>> Open2        Whole    6  25  25  25  11  20
>>>
>>> to:
>>> Open1        South    6  25   1   1  11  20
>>> Open2    %2
>