Implementing Temperature dependent fluid density

Hello,

I am currently using OGS 5.7 on Linux.

I am attempting to run a coupled Groundwater Flow and Heat Transport problemin 3D. I would like to simulate a Geothermal Doublet System.

I would like to implement a Temperature dependent density function for the water in the reservoir.

According to the OGS documentation, this can be done using Density model #4 as shown below

  1. rho(T) = rho_0*(1+beta_T*(T-T_0))

The only example I can find of this implementation is in Elder_HT example (attached), however, I am not 100% sure about the order of the parameters in the input file.
Intuitively, from left to right it should be : Model # – rho_0 – beta_T – T_0

However from the example it does not make sense to have a starting temperature of -0.2, but this is also an invalid value for the volumetric temperature coefficient of water.

Can anyone please shed some light on this? Would be greatly appreciated.

Cheers,
Ariel

Elder_HT.mfp (250 Bytes)

Hi,

  $DENSITY
   4 1000 0 -0.2

means rho_0 = 1e3, T_0 = 0, beta_T = -0.2. The value of beta_T is not coming from real fluid property and is artificial one to demonstrate convection.

Cheers,
Nori

···

On 06/05/16 18:37, Ariel Thomas wrote:

Hello,

I am currently using OGS 5.7 on Linux.

I am attempting to run a coupled Groundwater Flow and Heat Transport
problemin 3D. I would like to simulate a Geothermal Doublet System.

I would like to implement a Temperature dependent density function for
the water in the reservoir.

According to the OGS documentation, this can be done using Density model
#4 as shown below

4. rho(T) = rho_0*(1+beta_T*(T-T_0))

The only example I can find of this implementation is in Elder_HT
example (attached), however, I am not 100% sure about the order of the
parameters in the input file.
Intuitively, from left to right it should be : Model # -- rho_0 --
beta_T -- T_0

However from the example it does not make sense to have a starting
temperature of -0.2, but this is also an invalid value for the
volumetric temperature coefficient of water.

Can anyone please shed some light on this? Would be greatly appreciated.

Cheers,
Ariel

--
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, send
an email to ogs-users+unsubscribe@googlegroups.com
<mailto:ogs-users+unsubscribe@googlegroups.com>.
For more options, visit https://groups.google.com/d/optout.

--
Norihiro Watanabe, Dr.-Ing.
Department of Environmental Informatics

Helmholtz-Zentrum für Umweltforschung GmbH - UFZ
Helmholtz Centre for Environmental Research GmbH - UFZ
Permoserstraße 15 / 04318 Leipzig / Germany
Telefon +49 341 235 1806
norihiro.watanabe@ufz.de / www.ufz.de

Sitz der Gesellschaft: Leipzig
Registergericht: Amtsgericht Leipzig, Handelsregister Nr. B 4703
Vorsitzender des Aufsichtsrats: MinDirig Wilfried Kraus
Wissenschaftlicher Geschäftsführer: Prof. Dr. Georg Teutsch
Administrativer Geschäftsführer: N.N.

Thanks very much for the feedback Nori, it makes sense now.

Cheers,
Ariel

···

On Friday, May 6, 2016 at 8:03:45 PM UTC+2, Norihiro Watanabe wrote:

Hi,

$DENSITY
4 1000 0 -0.2

means rho_0 = 1e3, T_0 = 0, beta_T = -0.2. The value of beta_T is not coming from real fluid property and is artificial one to demonstrate convection.

Cheers,
Nori

On 06/05/16 18:37, Ariel Thomas wrote:

Hello,

I am currently using OGS 5.7 on Linux.

I am attempting to run a coupled Groundwater Flow and Heat Transport
problemin 3D. I would like to simulate a Geothermal Doublet System.

I would like to implement a Temperature dependent density function for
the water in the reservoir.

According to the OGS documentation, this can be done using Density model
#4 as shown below

  1. rho(T) = rho_0*(1+beta_T*(T-T_0))

The only example I can find of this implementation is in Elder_HT
example (attached), however, I am not 100% sure about the order of the
parameters in the input file.
Intuitively, from left to right it should be : Model # – rho_0 –
beta_T – T_0

However from the example it does not make sense to have a starting
temperature of -0.2, but this is also an invalid value for the
volumetric temperature coefficient of water.

Can anyone please shed some light on this? Would be greatly appreciated.

Cheers,
Ariel


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, send
an email to ogs-users+...@googlegroups.com

mailto:ogs-users+...@googlegroups.com.
For more options, visit https://groups.google.com/d/optout.


Norihiro Watanabe, Dr.-Ing.
Department of Environmental Informatics

Helmholtz-Zentrum für Umweltforschung GmbH - UFZ
Helmholtz Centre for Environmental Research GmbH - UFZ
Permoserstraße 15 / 04318 Leipzig / Germany
Telefon +49 341 235 1806
norihiro...@ufz.de / www.ufz.de

Sitz der Gesellschaft: Leipzig
Registergericht: Amtsgericht Leipzig, Handelsregister Nr. B 4703
Vorsitzender des Aufsichtsrats: MinDirig Wilfried Kraus
Wissenschaftlicher Geschäftsführer: Prof. Dr. Georg Teutsch
Administrativer Geschäftsführer: N.N.