# Output Flux through Boundary Surface **URL:** \ **Category:** ogs-devs\ **Tags:** mailing-list\ **Created:** [April 8, 2016, 1:30am UTC](https://discourse.opengeosys.org/t/output-flux-through-boundary-surface/271 "2016-04-08T01:30:05Z")\ **Posts on this page:** 7\ **Page:** 1

**Author:** ![Wenjie\_Xu](https://discourse.opengeosys.org/letter_avatar_proxy/v4/letter/w/46a35a/32.png) [@Wenjie\_Xu](https://discourse.opengeosys.org/u/Wenjie_Xu)\ **Post date:** [April 8, 2016, 1:30am UTC](https://discourse.opengeosys.org/t/output-flux-through-boundary-surface/271/1 "2016-04-08T01:30:05Z")

Dear All, does anybody know how to output the mass flux through a boundary surface in OGS5? Cheers Wenjie ---

**Author:** ![Norihiro\_Watanabe2](https://discourse.opengeosys.org/letter_avatar_proxy/v4/letter/n/e36b37/32.png) [@Norihiro\_Watanabe2](https://discourse.opengeosys.org/u/Norihiro_Watanabe2)\ **Post date:** [April 8, 2016, 4:34am UTC](https://discourse.opengeosys.org/t/output-flux-through-boundary-surface/271/2 "2016-04-08T04:34:49Z")

Setting $DAT\_TYPE TOTAL\_FLUX in OUT file might work, but I'm not sure. maybe someone from Kiel can help you. best, nori > **···** > > On 04/08/2016 03:30 AM, Wenjie Xu wrote: > > > Dear All, > > > > does anybody know how to output the mass flux through a boundary surface > > in OGS5? > > > > Cheers > > > > Wenjie > > > > -- > > You received this message because you are subscribed to the Google > > Groups "ogs-devs" group. > > To unsubscribe from this group and stop receiving emails from it, send > > an email to ogs-devs+unsubscribe@googlegroups.com > > \. > > For more options, visit [https://groups.google.com/d/optout\](https://groups.google.com/d/optout%5C). > > -- > Norihiro Watanabe, Dr.-Ing. > Department of Environmental Informatics (ENVINF) > Wissenschaftler > > Helmholtz-Zentrum für Umweltforschung GmbH - UFZ > Helmholtz Centre for Environmental Research GmbH - UFZ > Permoserstraße 15 / 04318 Leipzig / Germany > > norihiro.watanabe@ufz.de / [http://www.ufz.de](http://www.ufz.de) > Telefon +49 341 235 1806 > > 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: Dr. Heike Graßmann ---

**Author:** ![marc.walther](https://discourse.opengeosys.org/user_avatar/discourse.opengeosys.org/marc.walther/32/566_2.png) [@marc.walther](https://discourse.opengeosys.org/u/marc.walther)\ **Post date:** [April 8, 2016, 6:07am UTC](https://discourse.opengeosys.org/t/output-flux-through-boundary-surface/271/3 "2016-04-08T06:07:44Z")

You can also use Paraview to slice a plane of your domain and then use a filter called “Surface Flow” (or similar, I don’t remember exactly). Best, Marc * * * Marc Walther Hydrologist JProf Dr. rer. nat. Helmholtz Centre for Environmental Research - UFZ Department of Environmental Informatics Permoserstraße 15, 04318 Leipzig, Germany Technische Universität Dresden Faculty of Environmental Sciences Department of Hydrosciences Institute for Groundwater Management 01062 Dresden Visiting Address UFZ Permoserstraße 15, 04318 Leipzig Building 7.2, Room E110 Visiting Address TUD Bergstr. 66, 01069 Dresden Neubau Chemie 2. Bauabschnitt, CHE-BA2, Room E60 Phone +49 341 235 10 54 Fax +49 341 235 19 39 Mobile +49 178 334 18 19 Email [marc.walther@ufz.de](mailto:marc.walther@ufz.de) Web http://www.ufz.de Personal http://www.ufz.de/index.php?en=32239 ResGate http://www.researchgate.net/profile/Marc\_Walther Helmholtz-Zentrum für Umweltforschung GmbH - UFZ Registered Office: Leipzig Registration Office: Amtsgericht Leipzig Trade Register Nr. B 4703 Chairman of the Supervisory Board: MinR Wilfried Kraus Scientific Director: Prof. Dr. Georg Teutsch Administrative Director: Dr. Heike Graßmann * * * > **···** > > Sent from my mobile device, please excuse spelling mistakes. > > On 8 April 2016 3:30:14 am Wenjie Xu [wenjiexu84@gmail.com](mailto:wenjiexu84@gmail.com) wrote: > > > Dear All, > > > does anybody know how to output the mass flux through a boundary surface in OGS5? > > > Cheers > > > Wenjie > > > – > > > > You received this message because you are subscribed to the Google Groups “ogs-devs” group. > > > > To unsubscribe from this group and stop receiving emails from it, send an email to [ogs-devs+unsubscribe@googlegroups.com](mailto:ogs-devs+unsubscribe@googlegroups.com). > > > > For more options, visit [https://groups.google.com/d/optout](https://groups.google.com/d/optout). ---

**Author:** ![Christof\_Beyer](https://discourse.opengeosys.org/letter_avatar_proxy/v4/letter/c/71c47a/32.png) [@Christof\_Beyer](https://discourse.opengeosys.org/u/Christof_Beyer)\ **Post date:** [April 8, 2016, 6:19am UTC](https://discourse.opengeosys.org/t/output-flux-through-boundary-surface/271/4 "2016-04-08T06:19:41Z")

Hi Wenjie, as Nori said, you can use the TOTAL\_FLUX output for fluxes across surfaces (or polylines in 2D): #OUTPUT $PCS\_TYPE HEAT\_TRANSPORT $GEO\_TYPE SURFACE SURF1 $DAT\_TYPE TOTAL\_FLUX $TIM\_TYPE STEPS 1 This works for heat & mass transport, liquid & groundwater flow. Just set the correct $PCS\_TYPE. For some boundary element types (tri, tet), however, accuracy may not be perfect. You can also print total heat, or mass stored in your model, e.g. for a particular material group (MatGroup 0 in this case): #OUTPUT $PCS\_TYPE HEAT\_TRANSPORT $DAT\_TYPE CONTENT 0 $TIM\_TYPE STEPS 1 These functions are implemented in the KielTesting branch: [https://svn.ufz.de/svn/ogs/branches/kiel\_testing](https://svn.ufz.de/svn/ogs/branches/kiel_testing) Jens Olaf Delfs can give you more information, as he implemented these routines. Schönen Tag noch, Christof > **···** > > Am 08.04.2016 um 03:30 schrieb Wenjie Xu: > > > Dear All, > > > > does anybody know how to output the mass flux through a boundary surface > > in OGS5? > > > > Cheers > > > > Wenjie > > -- > \_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_ > Dr. Christof Beyer > Institute of Geosciences > Geohydromodelling > Christian-Albrechts-University Kiel > Ludewig-Meyn-Str. 10 > 24118 Kiel > Germany > > phone: +49(0)431-8803172 > fax: +49(0)431-8807606 > mobile: +49(0)176-24297908 > email: christof.beyer@gpi.uni-kiel.de > home: [http://www.ifg.uni-kiel.de/](http://www.ifg.uni-kiel.de/) > \_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_ ---

**Author:** ![jens-olaf\_Delfs](https://discourse.opengeosys.org/letter_avatar_proxy/v4/letter/j/ce73a5/32.png) [@jens-olaf\_Delfs](https://discourse.opengeosys.org/u/jens-olaf_Delfs)\ **Post date:** [April 8, 2016, 9:05am UTC](https://discourse.opengeosys.org/t/output-flux-through-boundary-surface/271/5 "2016-04-08T09:05:04Z")

A desciption is available here: [https://github.com/drjod/ogs\_kb1/wiki/Balancing-toolkit](https://github.com/drjod/ogs_kb1/wiki/Balancing-toolkit) > **···** > > 2016-04-08 3:30 GMT+02:00 Wenjie Xu [wenjiexu84@gmail.com](mailto:wenjiexu84@gmail.com): > > > Dear All, > > > > > > does anybody know how to output the mass flux through a boundary surface in OGS5? > > > > > > Cheers > > > > > > Wenjie > > > – > > > > You received this message because you are subscribed to the Google Groups “ogs-devs” group. > > > > To unsubscribe from this group and stop receiving emails from it, send an email to [ogs-devs+unsubscribe@googlegroups.com](mailto:ogs-devs+unsubscribe@googlegroups.com). > > > > For more options, visit [https://groups.google.com/d/optout](https://groups.google.com/d/optout). ---

**Author:** ![Xuan\_Yu](https://discourse.opengeosys.org/letter_avatar_proxy/v4/letter/x/b782af/32.png) [@Xuan\_Yu](https://discourse.opengeosys.org/u/Xuan_Yu)\ **Post date:** [January 25, 2018, 9:09pm UTC](https://discourse.opengeosys.org/t/output-flux-through-boundary-surface/271/6 "2018-01-25T21:09:00Z")

I just tried today with triangle mesh, it did not work. And I found a webpage here [http://tk-opengeosys.blogspot.com/2016/04/](http://tk-opengeosys.blogspot.com/2016/04/) says that “there seems to be a bug for trinagles and tetrahedra” > **···** > > On Friday, April 8, 2016 at 5:05:05 AM UTC-4, jens wrote: > > > A desciption is available here: [https://github.com/drjod/ogs\_kb1/wiki/Balancing-toolkit](https://github.com/drjod/ogs_kb1/wiki/Balancing-toolkit) > > > 2016-04-08 3:30 GMT+02:00 Wenjie Xu [wenji...@gmail.com](mailto:wenji...@gmail.com): > > > > > Dear All, > > > > > > > > does anybody know how to output the mass flux through a boundary surface in OGS5? > > > > > > > > Cheers > > > > > > > > Wenjie > > > > – > > > > > > You received this message because you are subscribed to the Google Groups “ogs-devs” group. > > > > > > To unsubscribe from this group and stop receiving emails from it, send an email to [ogs-devs+u...@googlegroups.com](mailto:ogs-devs+u...@googlegroups.com). > > > > > > For more options, visit [https://groups.google.com/d/optout](https://groups.google.com/d/optout). > > > ---

**Author:** ![marc.walther](https://discourse.opengeosys.org/user_avatar/discourse.opengeosys.org/marc.walther/32/566_2.png) [@marc.walther](https://discourse.opengeosys.org/u/marc.walther)\ **Post date:** [January 25, 2018, 11:01pm UTC](https://discourse.opengeosys.org/t/output-flux-through-boundary-surface/271/7 "2018-01-25T23:01:14Z")

Dear Xuan, I suggest to use Paraview for getting a budget through any arbitrary planar surface. You can use the filters like this: 1. ‘slice’ (define your area where you want to know the flux), 2. if you have a 2d setup add ‘linear extrusion’ with length of unit 1 into the missing dimension here, 3. ‘generate normals’ on the new surface, 4. use a ‘calculator’ filter to compute the flux per node (type ‘velocity.normals’ to computer a scalar product, both variables should be vectors), 5. and finally ‘integrate variables’ to get the total flux through the area Best, Marc * * * Marc Walther Hydrologist JProf. Dr. rer. nat. Helmholtz Centre for Environmental Research - UFZ Department of Environmental Informatics Permoserstraße 15, 04318 Leipzig, Germany Technische Universität Dresden Faculty of Environmental Sciences Department of Hydrosciences Institute for Groundwater Management 01062 Dresden Visiting Address UFZ Permoserstraße 15, 04318 Leipzig Building 7.2, Room E110 Visiting Address TUD Bergstr. 66, 01069 Dresden Neubau Chemie 2. Bauabschnitt, CHE-BA2, Room P204 Phone +49 341 235 10 54 Fax +49 341 235 19 39 Email [marc.walther@ufz.de](mailto:marc.walther@ufz.de) Web http://www.ufz.de Personal http://www.ufz.de/index.php?en=32239 ResGate http://www.researchgate.net/profile/Marc\_Walther Helmholtz-Zentrum für Umweltforschung GmbH - UFZ Registered Office: Leipzig Registration Office: Amtsgericht Leipzig Trade Register Nr. B 4703 Chairman of the Supervisory Board: MinDirig Wilfried Kraus Scientific Director: Prof. Dr. Dr. hc. Georg Teutsch Administrative Director: Prof. Dr. Heike Graßmann * * * > **···** > > Sent from my mobile device, please excuse spelling mistakes. > > On 25 January 2018 22:09:09 Xuan Yu [xuanyupsu@gmail.com](mailto:xuanyupsu@gmail.com) wrote: > > > I just tried today with triangle mesh, it did not work. And I found a webpage here [http://tk-opengeosys.blogspot.com/2016/04/](http://tk-opengeosys.blogspot.com/2016/04/) says that “there seems to be a bug for trinagles and tetrahedra” > > > > On Friday, April 8, 2016 at 5:05:05 AM UTC-4, jens wrote: > > > > > A desciption is available here: [https://github.com/drjod/ogs\_kb1/wiki/Balancing-toolkit](https://github.com/drjod/ogs_kb1/wiki/Balancing-toolkit) > > > > 2016-04-08 3:30 GMT+02:00 Wenjie Xu [wenji...@gmail.com](mailto:wenji...@gmail.com): > > > > > > > Dear All, > > > > > > > > > > does anybody know how to output the mass flux through a boundary surface in OGS5? > > > > > > > > > > Cheers > > > > > > > > > > Wenjie > > > > > – > > > > > > > > You received this message because you are subscribed to the Google Groups “ogs-devs” group. > > > > > > > > To unsubscribe from this group and stop receiving emails from it, send an email to [ogs-devs+u...@googlegroups.com](mailto:ogs-devs+u...@googlegroups.com). > > > > > > > > For more options, visit [https://groups.google.com/d/optout](https://groups.google.com/d/optout). > > > > > > > – > > > > You received this message because you are subscribed to the Google Groups “ogs-devs” group. > > > > To unsubscribe from this group and stop receiving emails from it, send an email to [ogs-devs+unsubscribe@googlegroups.com](mailto:ogs-devs+unsubscribe@googlegroups.com). > > > > For more options, visit [https://groups.google.com/d/optout](https://groups.google.com/d/optout).