# Heat transport in porous media - z nodal velocity component in tecplot file equals to zero

Dear OGS community,

I’m modeling the liquid flow and heat transport through a 1x1 porous media enclosure

and I face a problem regarding to the velocity components on the nodes in z direction.

I’m studying a 2D problem in x-z direction. The problem is now, after the computation I get velocity components in y direction instead of z direction in the tecplot files. As a second dat type I chose PVD, hence I get there VTU files in a right order with y velocity components equals to zero.

After a comparison of those two velocity components in z and y direction, I recognized that they are matching.

My question is now, why isn’t it represented as z velocity components and is it really the z velocity component or did I make a great mistake during the set up?

In further simulations I only defined

VELOCITY_X1

VELOCITY_Z1

as node values, therefore I was quite surprised to see the latter components equals to zero.

Can anyone explain me this phenomena?

I have another question concerning the liquid flow tecplot file. There it is showing

VARIABLES = “X”,“Y”,“Z”, “PRESSURE1”, “TEMPERATURE1”, “VELOCITY_X1”, “VELOCITY_Y1”, “VELOCITY_Z1”. I wonder why the temperature values aren’t in the range between 273.15 and 274.15 because these are the boundary conditions on both walls.

Can anyone explain me this as well?

You’ll find the model attached.

Thanks a lot and

best regards

Tuong Vi

00_CODE_Ra100_5months_60x60.rar (1.31 MB)

Hi,

If my understanding is correct, OGS internally transforms x-z to x-y. The Tecplot output simply output results in the transformed domain, i.e. v_y is actually v_z. The PVD output is aware of the transformation.

best,
nori

···

On 2017/11/06 20:56, 'Tuong Vi Tran' via ogs-users wrote:

Dear OGS community,

I'm modeling the liquid flow and heat transport through a 1x1 porous media enclosure

and I face a problem regarding to the velocity components on the nodes in z direction.

I’m studying a 2D problem in x-z direction. The problem is now, after the computation I get velocity components in y direction instead of z direction in the tecplot files. As a second dat type I chose PVD, hence I get there VTU files in a right order with y velocity components equals to zero.

After a comparison of those two velocity components in z and y direction, I recognized that they are matching.

My question is now, why isn’t it represented as z velocity components and is it really the z velocity component or did I make a great mistake during the set up?

In further simulations I only defined

VELOCITY_X1

VELOCITY_Z1

as node values, therefore I was quite surprised to see the latter components equals to zero.

Can anyone explain me this phenomena?

I have another question concerning the liquid flow tecplot file. There it is showing

VARIABLES= "X","Y","Z", "PRESSURE1", "TEMPERATURE1", "VELOCITY_X1", "VELOCITY_Y1", "VELOCITY_Z1". I wonder why the temperature values aren’t in the range between 273.15 and 274.15 because these are the boundary conditions on both walls.

Can anyone explain me this as well?

You'll find the model attached.

Thanks a lot and

best regards

Tuong Vi

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Hi nori,
Thanks a lot for your quick response I didn’t know that tecplot only gives the output for the transformed domain.

Do you maybe also know why I get a double output of the pressure in the liquid flow tecplot file even though on the top the temperature is mentioned?

Best,
tvi

···

Am Montag, 6. November 2017 22:55:51 UTC+1 schrieb Norihiro Watanabe:

Hi,

If my understanding is correct, OGS internally transforms x-z to x-y.
The Tecplot output simply output results in the transformed domain, i.e.
v_y is actually v_z. The PVD output is aware of the transformation.

best,
nori

On 2017/11/06 20:56, ‘Tuong Vi Tran’ via ogs-users wrote:

Dear OGS community,

I’m modeling the liquid flow and heat transport through a 1x1 porous
media enclosure

and I face a problem regarding to the velocity components on the nodes
in z direction.

I’m studying a 2D problem in x-z direction. The problem is now, after
the computation I get velocity components in y direction instead of z
direction in the tecplot files. As a second dat type I chose PVD, hence
I get there VTU files in a right order with y velocity components equals
to zero.

After a comparison of those two velocity components in z and y
direction, I recognized that they are matching.

My question is now, why isn’t it represented as z velocity components
and is it really the z velocity component or did I make a great mistake
during the set up?

In further simulations I only defined

VELOCITY_X1

VELOCITY_Z1

as node values, therefore I was quite surprised to see the latter
components equals to zero.

Can anyone explain me this phenomena?

I have another question concerning the liquid flow tecplot file. There
it is showing

VARIABLES= “X”,“Y”,“Z”, “PRESSURE1”, “TEMPERATURE1”, “VELOCITY_X1”,
“VELOCITY_Y1”, “VELOCITY_Z1”. I wonder why the temperature values aren’t
in the range between 273.15 and 274.15 because these are the boundary
conditions on both walls.

Can anyone explain me this as well?

You’ll find the model attached.

Thanks a lot and

best regards

Tuong Vi

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what do you mean "double output of the pressure"?

nori

···

On 11/07/2017 05:47 PM, 'Tuong Vi Tran' via ogs-users wrote:

Hi nori,
Thanks a lot for your quick response I didn't know that tecplot only gives the output for the transformed domain.

Do you maybe also know why I get a double output of the pressure in the liquid flow tecplot file even though on the top the temperature is mentioned?

Best,
tvi

Am Montag, 6. November 2017 22:55:51 UTC+1 schrieb Norihiro Watanabe:

Hi,

If my understanding is correct, OGS internally transforms x-z to x-y.
The Tecplot output simply output results in the transformed domain,
i.e.
v_y is actually v_z. The PVD output is aware of the transformation.

best,
nori

On 2017/11/06 20:56, 'Tuong Vi Tran' via ogs-users wrote:
> Dear OGS community,
>
> I'm modeling the liquid flow and heat transport through a 1x1 porous
> media enclosure
>
> and I face a problem regarding to the velocity components on the
nodes
> in z direction.
>
> I’m studying a 2D problem in x-z direction. The problem is now,
after
> the computation I get velocity components in y direction instead
of z
> direction in the tecplot files. As a second dat type I chose PVD,
hence
> I get there VTU files in a right order with y velocity components
equals
> to zero.
>
> After a comparison of those two velocity components in z and y
> direction, I recognized that they are matching.
>
> My question is now, why isn’t it represented as z velocity
components
> and is it really the z velocity component or did I make a great
mistake
> during the set up?
>
> In further simulations I only defined
>
> VELOCITY_X1
>
> VELOCITY_Z1
>
> as node values, therefore I was quite surprised to see the latter
> components equals to zero.
>
> Can anyone explain me this phenomena?
>
> I have another question concerning the liquid flow tecplot file.
There
> it is showing
>
> VARIABLES= "X","Y","Z", "PRESSURE1", "TEMPERATURE1", "VELOCITY_X1",
> "VELOCITY_Y1", "VELOCITY_Z1". I wonder why the temperature values
aren’t
> in the range between 273.15 and 274.15 because these are the
boundary
> conditions on both walls.
>
> Can anyone explain me this as well?
>
> You'll find the model attached.
>
> Thanks a lot and
>
> best regards
>
> Tuong Vi
>
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Hi Nori,
attached you find a picture where I marked the outputs in the liquid tecplot file.
It confuses me a bit that above stands temperature but in fact it’s two times the pressure output but it’s fine.

Best,
tvi
PS: Sorry, for the late response

···

Am Dienstag, 7. November 2017 22:49:40 UTC+1 schrieb Norihiro Watanabe:

what do you mean “double output of the pressure”?

nori

On 11/07/2017 05:47 PM, ‘Tuong Vi Tran’ via ogs-users wrote:

Hi nori,
Thanks a lot for your quick response I didn’t know that tecplot only
gives the output for the transformed domain.

Do you maybe also know why I get a double output of the pressure in the
liquid flow tecplot file even though on the top the temperature is
mentioned?

Best,
tvi

Am Montag, 6. November 2017 22:55:51 UTC+1 schrieb Norihiro Watanabe:

``````Hi,

If my understanding is correct, OGS internally transforms x-z to x-y.
The Tecplot output simply output results in the transformed domain,
i.e.
v_y is actually v_z. The PVD output is aware of the transformation.

best,
nori

On 2017/11/06 20:56, 'Tuong Vi Tran' via ogs-users wrote:
> Dear OGS community,
>
>
> I'm modeling the liquid flow and heat transport through a 1x1 porous
> media enclosure
>
> and I face a problem regarding to the velocity components on the
nodes
> in z direction.
>
> I’m studying a 2D problem in x-z direction. The problem is now,
after
> the computation I get velocity components in y direction instead
of z
> direction in the tecplot files. As a second dat type I chose PVD,
hence
> I get there VTU files in a right order with y velocity components
equals
> to zero.
>
> After a comparison of those two velocity components in z and y
> direction, I recognized that they are matching.
>
> My question is now, why isn’t it represented as z velocity
components
> and is it really the z velocity component or did I make a great
mistake
> during the set up?
>
>
> In further simulations I only defined
>
> VELOCITY_X1
>
> VELOCITY_Z1
>
> as node values, therefore I was quite surprised to see the latter
> components equals to zero.
>
> Can anyone explain me this phenomena?
>
> I have another question concerning the liquid flow tecplot file.
There
> it is showing
>
> VARIABLES= "X","Y","Z", "PRESSURE1", "TEMPERATURE1", "VELOCITY_X1",
> "VELOCITY_Y1", "VELOCITY_Z1". I wonder why the temperature values
aren’t
> in the range between 273.15 and 274.15 because these are the
boundary
> conditions on both walls.
>
> Can anyone explain me this as well?
>
> You'll find the model attached.
>
> Thanks a lot and
>
> best regards
>
> Tuong Vi
>
>
>
> --
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> Groups "ogs-users" group.
> To unsubscribe from this group and stop receiving emails from it,
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> an email to ogs-users+...@googlegroups.com <javascript:>
``````
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``````

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Hi,

Thanks for the picture. I got what you mean.

To fix the issue, please try removing two lines, \$PCS_TYPE LIQUID_FLOW, in *.out file. OGS tried to find TEMPERATURE1 in LIQUID_FLOW process but failed because the data belongs to HEAT_TRANSPORT (then OGS outputs some dummy data instead).

best,
nori

···

On 11/10/2017 11:08 PM, 'Tuong Vi Tran' via ogs-users wrote:

Hi Nori,
attached you find a picture where I marked the outputs in the liquid tecplot file.
It confuses me a bit that above stands temperature but in fact it's two times the pressure output but it's fine.

Best,
tvi
PS: Sorry, for the late response

Am Dienstag, 7. November 2017 22:49:40 UTC+1 schrieb Norihiro Watanabe:

what do you mean "double output of the pressure"?

nori

On 11/07/2017 05:47 PM, 'Tuong Vi Tran' via ogs-users wrote:
> Hi nori,
> Thanks a lot for your quick response I didn't know that tecplot only
> gives the output for the transformed domain.
>
> Do you maybe also know why I get a double output of the pressure
in the
> liquid flow tecplot file even though on the top the temperature is
> mentioned?
>
> Best,
> tvi
>
> Am Montag, 6. November 2017 22:55:51 UTC+1 schrieb Norihiro > Watanabe:
>
> Hi,
>
> If my understanding is correct, OGS internally transforms x-z
to x-y.
> The Tecplot output simply output results in the transformed
domain,
> i.e.
> v_y is actually v_z. The PVD output is aware of the
transformation.
>
> best,
> nori
>
> On 2017/11/06 20:56, 'Tuong Vi Tran' via ogs-users wrote:
> > Dear OGS community,
> >
> > I'm modeling the liquid flow and heat transport through a
1x1 porous
> > media enclosure
> >
> > and I face a problem regarding to the velocity components
on the
> nodes
> > in z direction.
> >
> > I’m studying a 2D problem in x-z direction. The problem is
now,
> after
> > the computation I get velocity components in y direction
> of z
> > direction in the tecplot files. As a second dat type I
chose PVD,
> hence
> > I get there VTU files in a right order with y velocity
components
> equals
> > to zero.
> >
> > After a comparison of those two velocity components in z
and y
> > direction, I recognized that they are matching.
> >
> > My question is now, why isn’t it represented as z velocity
> components
> > and is it really the z velocity component or did I make a
great
> mistake
> > during the set up?
> >
> > In further simulations I only defined
> >
> > VELOCITY_X1
> >
> > VELOCITY_Z1
> >
> > as node values, therefore I was quite surprised to see the
latter
> > components equals to zero.
> >
> > Can anyone explain me this phenomena?
> >
> > I have another question concerning the liquid flow tecplot
file.
> There
> > it is showing
> >
> > VARIABLES= "X","Y","Z", "PRESSURE1", "TEMPERATURE1",
"VELOCITY_X1",
> > "VELOCITY_Y1", "VELOCITY_Z1". I wonder why the temperature
values
> aren’t
> > in the range between 273.15 and 274.15 because these are the
> boundary
> > conditions on both walls.
> >
> > Can anyone explain me this as well?
> >
> > You'll find the model attached.
> >
> > Thanks a lot and
> >
> > best regards
> >
> > Tuong Vi
> >
> > --
> > You received this message because you are subscribed to
> > Groups "ogs-users" group.
> > To unsubscribe from this group and stop receiving emails
from it,
> send
> > an email to ogs-users+...@googlegroups.com <javascript:>
> > For more options, visit https://groups.google.com/d/optout
>
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> You received this message because you are subscribed to the Google
> Groups "ogs-users" group.
> To unsubscribe from this group and stop receiving emails from it,
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Hi nori,

It works!

Best,
tvi

···

Am Montag, 13. November 2017 21:37:20 UTC+1 schrieb Norihiro Watanabe:

Hi,

Thanks for the picture. I got what you mean.

To fix the issue, please try removing two lines, \$PCS_TYPE LIQUID_FLOW,
in *.out file. OGS tried to find TEMPERATURE1 in LIQUID_FLOW process but
failed because the data belongs to HEAT_TRANSPORT (then OGS outputs some

best,
nori

On 11/10/2017 11:08 PM, ‘Tuong Vi Tran’ via ogs-users wrote:

Hi Nori,
attached you find a picture where I marked the outputs in the liquid
tecplot file.
It confuses me a bit that above stands temperature but in fact it’s two
times the pressure output but it’s fine.

Best,
tvi
PS: Sorry, for the late response

Am Dienstag, 7. November 2017 22:49:40 UTC+1 schrieb Norihiro Watanabe:

``````what do you mean "double output of the pressure"?

nori

On 11/07/2017 05:47 PM, 'Tuong Vi Tran' via ogs-users wrote:
> Hi nori,
> Thanks a lot for your quick response I didn't know that tecplot only
> gives the output for the transformed domain.
>
> Do you maybe also know why I get a double output of the pressure
in the
> liquid flow tecplot file even though on the top the temperature is
> mentioned?
>
> Best,
> tvi
>
> Am Montag, 6. November 2017 22:55:51 UTC+1 schrieb Norihiro > >     Watanabe:
>
>     Hi,
>
>     If my understanding is correct, OGS internally transforms x-z
to x-y.
>     The Tecplot output simply output results in the transformed
domain,
>     i.e.
>     v_y is actually v_z. The PVD output is aware of the
transformation.
>
>     best,
>     nori
>
>
>     On 2017/11/06 20:56, 'Tuong Vi Tran' via ogs-users wrote:
>      > Dear OGS community,
>      >
>      >
>      > I'm modeling the liquid flow and heat transport through a
1x1 porous
>      > media enclosure
>      >
>      > and I face a problem regarding to the velocity components
on the
>     nodes
>      > in z direction.
>      >
>      > I’m studying a 2D problem in x-z direction. The problem is
now,
>     after
>      > the computation I get velocity components in y direction
>     of z
>      > direction in the tecplot files. As a second dat type I
chose PVD,
>     hence
>      > I get there VTU files in a right order with y velocity
components
>     equals
>      > to zero.
>      >
>      > After a comparison of those two velocity components in z
and y
>      > direction, I recognized that they are matching.
>      >
>      > My question is now, why isn’t it represented as z velocity
>     components
>      > and is it really the z velocity component or did I make a
great
>     mistake
>      > during the set up?
>      >
>      >
>      > In further simulations I only defined
>      >
>      > VELOCITY_X1
>      >
>      > VELOCITY_Z1
>      >
>      > as node values, therefore I was quite surprised to see the
latter
>      > components equals to zero.
>      >
>      > Can anyone explain me this phenomena?
>      >
>      > I have another question concerning the liquid flow tecplot
file.
>     There
>      > it is showing
>      >
>      > VARIABLES= "X","Y","Z", "PRESSURE1", "TEMPERATURE1",
"VELOCITY_X1",
>      > "VELOCITY_Y1", "VELOCITY_Z1". I wonder why the temperature
values
>     aren’t
>      > in the range between 273.15 and 274.15 because these are the
>     boundary
>      > conditions on both walls.
>      >
>      > Can anyone explain me this as well?
>      >
>      > You'll find the model attached.
>      >
>      > Thanks a lot and
>      >
>      > best regards
>      >
>      > Tuong Vi
>      >
>      >
>      >
>      > --
>      > You received this message because you are subscribed to
>      > Groups "ogs-users" group.
>      > To unsubscribe from this group and stop receiving emails
from it,
>     send
>      > an email to ogs-users+...@googlegroups.com <javascript:>
``````
``````<[https://groups.google.com/d/optout](https://groups.google.com/d/optout)>
``````
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>
> --
> You received this message because you are subscribed to the Google
> Groups "ogs-users" group.
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