[esp-r] Re: CFD problem

[Aizaz Samuel]

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
> >> >
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