Density model "3" (concentration-dependent)

Dear OpenGeosys users and developers:
until ogs version 5.4.4, the effect of concentration on density was modelled with the keyword:

$DENSITY
3 1.000000e+003 0 0.2 ; C0 is 0. beta_C (drho_dC) is 0.2

in the .mfp file. We used this to solve the Elder problem (Chapter 11.2 of the 2012 book of benchmarks) and we got excellent results. From version 5.5.0 onwards however, this syntax appears to fail: the saline front advances only by diffusion. Does anybody know the new syntax for the density model “3”?

We take the chance to address a warm “Thank you” to the developers of OpenGeosys for their nice work.

Best regards,
John N.E. Papaspyros

Hi,

Please check your component name in *.mcp file. A component name for the density model 3 has been changed from "Isochlor" to "CONCENTRATION1" some time ago.

Regards,
Nori

···

On 02/14/2015 11:42 PM, John N.E. Papaspyros wrote:

Dear OpenGeosys users and developers:
until ogs version 5.4.4, the effect of concentration on density was
modelled with the keyword:

  $DENSITY
  3 1.000000e+003 0 0.2 ; C0 is 0. beta_C (drho_dC) is 0.2

in the .mfp file. We used this to solve the Elder problem (Chapter 11.2
of the 2012 book of benchmarks) and we got excellent results. From
version 5.5.0 onwards however, this syntax appears to fail: the saline
front advances only by diffusion. Does anybody know the new syntax for
the density model "3"?

We take the chance to address a warm "Thank you" to the developers of
OpenGeosys for their nice work.

Best regards,
John N.E. Papaspyros

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Dr.-Ing. Norihiro Watanabe
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

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Thank you very much dear Nori! You are right, of course: everything ran as it should when we changed all occurences of “Isochlor” to “CONCENTRATION1”.

With grateful regards,
John