[esp-r] Re: CFD problem

[Hall,Monika]

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        North    6  25  25  25  11  20
>
> and you will get rid of the warnings. The grid checker thinks that 
> open1 and
> open2 are representative of the whole domain in the top version and 
> otherwise in the bottom version.
>
> These warnings come from the grid checking subroutine and are not 
> linked to conflation at all.
>
> Further to your query, you need a static value of boundary condition 
> (pressure or velocity) when defining the CFD data. These values are 
> stored in the file and are used during standalone (unconflated) CFD 
> runs. When you choose conflation these values will not be used but 
> values calculated for each time step will be used instead.
>
> Hope that helps,
>
> Aizaz
>
>
> On Tuesday 28 April 2009 09:41, NALIN SWAROOP wrote:
>> Please find attached zip file containing the ESP-r and CFD definition 
>> files.Please take a look and identify the problem
>>
>> Regards
>> Nalin
>>
>> > It looks like the cells that you have nominated for each of the
>> boundary
>> > conditions (regardless of conflation type) are defined more than 
>> > once
>> or
>> > not
>> > at all. Make sure that all the cells in each of x,y and z 
>> > directions
>> are
>> > only
>> > used once when defining your boundary conditions.
>> >
>> > If the problem persists please provide the exact text string
>> describing
>> > the
>> > error.
>> >
>> > -Aizaz
>> >
>> > On Thursday 23 April 2009 06:16, NALIN SWAROOP wrote:
>> >> The problem is when I do CFD conflation with network flow and 
>> >> choose
>> the
>> >> respective nodes it asks which node is the CFD domain and which 
>> >> connection represents the openings when I give the respective 
>> >> names it gives the error that your cells are not compatible with 
>> >> the chosen face. please redefine and the program stops working at 
>> >> that point.
>> >>
>> >> Nalin
>> >>
>> >> > Dear Nalin,
>> >> >
>> >> > yes, you must use conflation of the CFD with an air flow network.
>> >> >
>> >> > 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: Mittwoch, 22. April 2009 11:50
>> >> > To: esp-r at lists.strath.ac.uk
>> >> > Subject: [esp-r] CFD problem
>> >> >
>> >> > Hello all
>> >> >
>> >> > I have a modeled a single room with 2 opposite windows/openings 
>> >> > I
>> have
>> >>
>> >> to
>> >>
>> >> > give pressure inlet and pressure outlet for the first case and
>> >>
>> >> velocity
>> >>
>> >> > inlet and velocity outlet for the second case now the problem is
>> when
>> >>
>> >> I
>> >>
>> >> > use CFD interface it asks for, in the case of pressure BCs inlet
>> and
>> >> > outlet pressure and in the case of velocity BCs inlet and outlet
>> >>
>> >> velocity
>> >>
>> >> > but these are constant values and I want to run a transient case
>> which
>> >> > uses the weather data file to calculate the pressure inlet and
>> outlet
>> >>
>> >> and
>> >>
>> >> > velocity inlet and outlet boundary conditions what should I do?
>> should
>> >> > use the airflow conflation with CFD.
>> >> >
>> >> > Regards
>> >> >
>> >> > Nalin
>> >> >
>> >> > _______________________________________________
>> >> > esp-r mailing list
>> >> > esp-r at lists.strath.ac.uk
>> >> > http://lists.strath.ac.uk/mailman/listinfo/esp-r
>> >>
>> >> _______________________________________________
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>> >
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>
>
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