coupled processes

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1

Hi all,

I have a question on variable density flow. So in the msh, we define the flow type at model domain: Richards_Flow, Groundwater_Flow. Where to define the MASS_TRANSPORT? Or is MASS_TRANSPORT will happen across the whole domain? Can we define a part of the domain has the MASS_TRANSPORT calculation?

Thanks,

Xuan

2

Hi Xuan,

You can try the subkeyword “$DEACTIVATED_SUBDOMAIN” in .pcs file like

#PROCESS

$PCS_TYPE

MASS_TRANSPORT

$DEACTIVATED_SUBDOMAIN

1 ;number of deactivated

0 ;material group index

Best regards,

Wenjie

···

发件人: ogs-users@googlegroups.com [mailto:ogs-users@googlegroups.com] 代表 Xuan Yu
发送时间: 2014年12月11日 8:10
收件人: ogs-users@googlegroups.com
主题: [ogs-users] coupled processes

Hi all,

I have a question on variable density flow. So in the msh, we define the flow type at model domain: Richards_Flow, Groundwater_Flow. Where to define the MASS_TRANSPORT? Or is MASS_TRANSPORT will happen across the whole domain? Can we define a part of the domain has the MASS_TRANSPORT calculation?

Thanks,

Xuan

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3

In addition to what Wenje said: you don’t have to give a specific process to the mesh file. If non is given, every process will be calculated on the whole mesh. Then, you can also use the keyword $DEACTIVATED_SUBDOMAIN, if you don’t want every process to be calculated.

Best,

Marc

···

Am 11.12.2014 04:20 schrieb “Wenjie Xu” wenjiexu84@gmail.com:

Hi Xuan,

You can try the subkeyword “$DEACTIVATED_SUBDOMAIN” in .pcs file like

#PROCESS

$PCS_TYPE

MASS_TRANSPORT

$DEACTIVATED_SUBDOMAIN

1 ;number of deactivated

0 ;material group index

Best regards,

Wenjie

发件人: ogs-users@googlegroups.com [mailto:ogs-users@googlegroups.com] 代表 Xuan Yu
发送时间: 2014年12月11日 8:10
收件人: ogs-users@googlegroups.com
主题: [ogs-users] coupled processes

Hi all,

I have a question on variable density flow. So in the msh, we define the flow type at model domain: Richards_Flow, Groundwater_Flow. Where to define the MASS_TRANSPORT? Or is MASS_TRANSPORT will happen across the whole domain? Can we define a part of the domain has the MASS_TRANSPORT calculation?

Thanks,

Xuan

–
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4

Thank you very much for the suggestion.

I have the following pcs file. However it stopped when I run the model. Looks like ogs want more to finish the reading of PCS.

ogs: output

···

Data input:
GEOLIB::readGLIFile open stream from file abdulLab.gli … done
read points from stream … ok, 7 points read
read polylines from stream … ok, 9 polylines read
read surfaces from stream … triangulation of surface: … done - 2 triangles
ok, 1 surfaces read
PCSRead …

.pcs file

GeoSys-PCS: Processes ------------------------------------------------

#PROCESS
$PCS_TYPE
RICHARDS_FLOW
$NUM_TYPE
NEW
$PRIMARY_VARIABLE
PRESSURE1

#PROCESS
$PCS_TYPE
OVERLAND_FLOW
$NUM_TYPE
NEW
$PRIMARY_VARIABLE
HEAD

#PROCESS
$PCS_TYPE
MASS_TRANSPORT
$NUM_TYPE
NEW
$PRIMARY_VARIABLE
CONCERNTRATION1

#PROCESS
$PCS_TYPE
MASS_TRANSPORT
$DEACTIVATED_SUBDOMAIN
1;
2;

#STOP

On Thursday, December 11, 2014 1:17:48 AM UTC-5, Marc Walther wrote:

In addition to what Wenje said: you don’t have to give a specific process to the mesh file. If non is given, every process will be calculated on the whole mesh. Then, you can also use the keyword $DEACTIVATED_SUBDOMAIN, if you don’t want every process to be calculated.

Best,

Marc

Am 11.12.2014 04:20 schrieb “Wenjie Xu” wenji...@gmail.com:

Hi Xuan,

You can try the subkeyword “$DEACTIVATED_SUBDOMAIN” in .pcs file like

#PROCESS

$PCS_TYPE

MASS_TRANSPORT

$DEACTIVATED_SUBDOMAIN

1 ;number of deactivated

0 ;material group index

Best regards,

Wenjie

发件人: ogs-...@googlegroups.com [mailto:ogs-...@googlegroups.com] 代表 Xuan Yu
发送时间: 2014年12月11日 8:10
收件人: ogs-...@googlegroups.com
主题: [ogs-users] coupled processes

Hi all,

I have a question on variable density flow. So in the msh, we define the flow type at model domain: Richards_Flow, Groundwater_Flow. Where to define the MASS_TRANSPORT? Or is MASS_TRANSPORT will happen across the whole domain? Can we define a part of the domain has the MASS_TRANSPORT calculation?

Thanks,

Xuan

–
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5

You have a typo in the mass transport pcs: it is CONCENTRATION1.

···

Am 11.12.2014 16:43 schrieb “Xuan Yu” xuanyupsu@gmail.com:

Thank you very much for the suggestion.

I have the following pcs file. However it stopped when I run the model. Looks like ogs want more to finish the reading of PCS.

ogs: output

Data input:
GEOLIB::readGLIFile open stream from file abdulLab.gli … done
read points from stream … ok, 7 points read
read polylines from stream … ok, 9 polylines read
read surfaces from stream … triangulation of surface: … done - 2 triangles
ok, 1 surfaces read
PCSRead …

.pcs file

GeoSys-PCS: Processes ------------------------------------------------

#PROCESS
$PCS_TYPE
RICHARDS_FLOW
$NUM_TYPE
NEW
$PRIMARY_VARIABLE
PRESSURE1

#PROCESS
$PCS_TYPE
OVERLAND_FLOW
$NUM_TYPE
NEW
$PRIMARY_VARIABLE
HEAD

#PROCESS
$PCS_TYPE
MASS_TRANSPORT
$NUM_TYPE
NEW
$PRIMARY_VARIABLE
CONCERNTRATION1

#PROCESS
$PCS_TYPE
MASS_TRANSPORT
$DEACTIVATED_SUBDOMAIN
1;
2;

#STOP

On Thursday, December 11, 2014 1:17:48 AM UTC-5, Marc Walther wrote:

In addition to what Wenje said: you don’t have to give a specific process to the mesh file. If non is given, every process will be calculated on the whole mesh. Then, you can also use the keyword $DEACTIVATED_SUBDOMAIN, if you don’t want every process to be calculated.

Best,

Marc

Am 11.12.2014 04:20 schrieb “Wenjie Xu” wenji...@gmail.com:

Hi Xuan,

You can try the subkeyword “$DEACTIVATED_SUBDOMAIN” in .pcs file like

#PROCESS

$PCS_TYPE

MASS_TRANSPORT

$DEACTIVATED_SUBDOMAIN

1 ;number of deactivated

0 ;material group index

Best regards,

Wenjie

发件人: ogs-...@googlegroups.com [mailto:ogs-...@googlegroups.com] 代表 Xuan Yu
发送时间: 2014年12月11日 8:10
收件人: ogs-...@googlegroups.com
主题: [ogs-users] coupled processes

Hi all,

I have a question on variable density flow. So in the msh, we define the flow type at model domain: Richards_Flow, Groundwater_Flow. Where to define the MASS_TRANSPORT? Or is MASS_TRANSPORT will happen across the whole domain? Can we define a part of the domain has the MASS_TRANSPORT calculation?

Thanks,

Xuan

–
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6

Hi Marc,
I still could not go through the pcs file after the correction of typo. The ogs still paused at the same step.
Thanks,
Xuan
#PROCESS
$PCS_TYPE
MASS_TRANSPORT
$NUM_TYPE
NEW
$PRIMARY_VARIABLE
CONCENTRATION1

#PROCESS
$PCS_TYPE
MASS_TRANSPORT
$DEACTIVATED_SUBDOMAIN
1 ;number of deactivated
2 ;material group index
#STOP

···

On Thursday, December 11, 2014 10:46:09 AM UTC-5, Marc Walther wrote:

You have a typo in the mass transport pcs: it is CONCENTRATION1.

Am 11.12.2014 16:43 schrieb “Xuan Yu” xuan...@gmail.com:

In addition to what Wenje said: you don’t have to give a specific process to the mesh file. If non is given, every process will be calculated on the whole mesh. Then, you can also use the keyword $DEACTIVATED_SUBDOMAIN, if you don’t want every process to be calculated.

Best,

Marc

Am 11.12.2014 04:20 schrieb “Wenjie Xu” wenji...@gmail.com:

Hi Xuan,

You can try the subkeyword “$DEACTIVATED_SUBDOMAIN” in .pcs file like

#PROCESS

$PCS_TYPE

MASS_TRANSPORT

$DEACTIVATED_SUBDOMAIN

1 ;number of deactivated

0 ;material group index

Best regards,

Wenjie

发件人: ogs-...@googlegroups.com [mailto:ogs-...@googlegroups.com] 代表 Xuan Yu
发送时间: 2014年12月11日 8:10
收件人: ogs-...@googlegroups.com
主题: [ogs-users] coupled processes

Hi all,

I have a question on variable density flow. So in the msh, we define the flow type at model domain: Richards_Flow, Groundwater_Flow. Where to define the MASS_TRANSPORT? Or is MASS_TRANSPORT will happen across the whole domain? Can we define a part of the domain has the MASS_TRANSPORT calculation?

Thanks,

Xuan

–
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.
For more options, visit https://groups.google.com/d/optout.

–

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Thank you very much for the suggestion.

I have the following pcs file. However it stopped when I run the model. Looks like ogs want more to finish the reading of PCS.

ogs: output

Data input:
GEOLIB::readGLIFile open stream from file abdulLab.gli … done
read points from stream … ok, 7 points read
read polylines from stream … ok, 9 polylines read
read surfaces from stream … triangulation of surface: … done - 2 triangles
ok, 1 surfaces read
PCSRead …

.pcs file

GeoSys-PCS: Processes ------------------------------------------------

#PROCESS
$PCS_TYPE
RICHARDS_FLOW
$NUM_TYPE
NEW
$PRIMARY_VARIABLE
PRESSURE1

#PROCESS
$PCS_TYPE
OVERLAND_FLOW
$NUM_TYPE
NEW
$PRIMARY_VARIABLE
HEAD

#PROCESS
$PCS_TYPE
MASS_TRANSPORT
$NUM_TYPE
NEW
$PRIMARY_VARIABLE
CONCERNTRATION1

#PROCESS
$PCS_TYPE
MASS_TRANSPORT
$DEACTIVATED_SUBDOMAIN
1;
2;

#STOP

On Thursday, December 11, 2014 1:17:48 AM UTC-5, Marc Walther wrote:

–

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7

Ah, I think, you have to add the subkeyword DEACTIVATED_SUBDOMAIN to the correct mass transport process. Or do you have two mass transport processes?

···

Am 11.12.2014 17:03 schrieb “Xuan Yu” xuanyupsu@gmail.com:

Hi Marc,
I still could not go through the pcs file after the correction of typo. The ogs still paused at the same step.
Thanks,
Xuan
#PROCESS
$PCS_TYPE
MASS_TRANSPORT
$NUM_TYPE
NEW
$PRIMARY_VARIABLE
CONCENTRATION1

#PROCESS
$PCS_TYPE
MASS_TRANSPORT
$DEACTIVATED_SUBDOMAIN
1 ;number of deactivated
2 ;material group index
#STOP

On Thursday, December 11, 2014 10:46:09 AM UTC-5, Marc Walther wrote:

You have a typo in the mass transport pcs: it is CONCENTRATION1.

Am 11.12.2014 16:43 schrieb “Xuan Yu” xuan...@gmail.com:

Thank you very much for the suggestion.

I have the following pcs file. However it stopped when I run the model. Looks like ogs want more to finish the reading of PCS.

ogs: output

Data input:
GEOLIB::readGLIFile open stream from file abdulLab.gli … done
read points from stream … ok, 7 points read
read polylines from stream … ok, 9 polylines read
read surfaces from stream … triangulation of surface: … done - 2 triangles
ok, 1 surfaces read
PCSRead …

.pcs file

GeoSys-PCS: Processes ------------------------------------------------

#PROCESS
$PCS_TYPE
RICHARDS_FLOW
$NUM_TYPE
NEW
$PRIMARY_VARIABLE
PRESSURE1

#PROCESS
$PCS_TYPE
OVERLAND_FLOW
$NUM_TYPE
NEW
$PRIMARY_VARIABLE
HEAD

#PROCESS
$PCS_TYPE
MASS_TRANSPORT
$NUM_TYPE
NEW
$PRIMARY_VARIABLE
CONCERNTRATION1

#PROCESS
$PCS_TYPE
MASS_TRANSPORT
$DEACTIVATED_SUBDOMAIN
1;
2;

#STOP

On Thursday, December 11, 2014 1:17:48 AM UTC-5, Marc Walther wrote:

In addition to what Wenje said: you don’t have to give a specific process to the mesh file. If non is given, every process will be calculated on the whole mesh. Then, you can also use the keyword $DEACTIVATED_SUBDOMAIN, if you don’t want every process to be calculated.

Best,

Marc

Am 11.12.2014 04:20 schrieb “Wenjie Xu” wenji...@gmail.com:

Hi Xuan,

You can try the subkeyword “$DEACTIVATED_SUBDOMAIN” in .pcs file like

#PROCESS

$PCS_TYPE

MASS_TRANSPORT

$DEACTIVATED_SUBDOMAIN

1 ;number of deactivated

0 ;material group index

Best regards,

Wenjie

发件人: ogs-...@googlegroups.com [mailto:ogs-...@googlegroups.com] 代表 Xuan Yu
发送时间: 2014年12月11日 8:10
收件人: ogs-...@googlegroups.com
主题: [ogs-users] coupled processes

Hi all,

I have a question on variable density flow. So in the msh, we define the flow type at model domain: Richards_Flow, Groundwater_Flow. Where to define the MASS_TRANSPORT? Or is MASS_TRANSPORT will happen across the whole domain? Can we define a part of the domain has the MASS_TRANSPORT calculation?

Thanks,

Xuan

–
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For more options, visit https://groups.google.com/d/optout.

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8

I see. I only have one mass transport process.

So I think the subkeyword is DEACTIVATE_SUBDOMAIN. Now, the ogs went through.

Thanks,

#PROCESS
$PCS_TYPE
RICHARDS_FLOW
$NUM_TYPE
NEW
$PRIMARY_VARIABLE
PRESSURE1

#PROCESS
$PCS_TYPE
OVERLAND_FLOW
$NUM_TYPE
NEW
$PRIMARY_VARIABLE
HEAD

#PROCESS
$PCS_TYPE
MASS_TRANSPORT
$PRIMARY_VARIABLE
CONCENTRATION1
$DEACTIVATE_SUBDOMAIN
1 ;number of deactivated
2 ;material group index
#STOP

···

On Thursday, December 11, 2014 11:08:47 AM UTC-5, Marc Walther wrote:

Ah, I think, you have to add the subkeyword DEACTIVATED_SUBDOMAIN to the correct mass transport process. Or do you have two mass transport processes?

Am 11.12.2014 17:03 schrieb “Xuan Yu” xuan...@gmail.com:

Hi Marc,
I still could not go through the pcs file after the correction of typo. The ogs still paused at the same step.
Thanks,
Xuan
#PROCESS
$PCS_TYPE
MASS_TRANSPORT
$NUM_TYPE
NEW
$PRIMARY_VARIABLE
CONCENTRATION1

#PROCESS
$PCS_TYPE
MASS_TRANSPORT
$DEACTIVATED_SUBDOMAIN
1 ;number of deactivated
2 ;material group index
#STOP

On Thursday, December 11, 2014 10:46:09 AM UTC-5, Marc Walther wrote:

You have a typo in the mass transport pcs: it is CONCENTRATION1.

Am 11.12.2014 16:43 schrieb “Xuan Yu” xuan...@gmail.com:

In addition to what Wenje said: you don’t have to give a specific process to the mesh file. If non is given, every process will be calculated on the whole mesh. Then, you can also use the keyword $DEACTIVATED_SUBDOMAIN, if you don’t want every process to be calculated.

Best,

Marc

Am 11.12.2014 04:20 schrieb “Wenjie Xu” wenji...@gmail.com:

Hi Xuan,

You can try the subkeyword “$DEACTIVATED_SUBDOMAIN” in .pcs file like

#PROCESS

$PCS_TYPE

MASS_TRANSPORT

$DEACTIVATED_SUBDOMAIN

1 ;number of deactivated

0 ;material group index

Best regards,

Wenjie

发件人: ogs-...@googlegroups.com [mailto:ogs-...@googlegroups.com] 代表 Xuan Yu
发送时间: 2014年12月11日 8:10
收件人: ogs-...@googlegroups.com
主题: [ogs-users] coupled processes

Hi all,

I have a question on variable density flow. So in the msh, we define the flow type at model domain: Richards_Flow, Groundwater_Flow. Where to define the MASS_TRANSPORT? Or is MASS_TRANSPORT will happen across the whole domain? Can we define a part of the domain has the MASS_TRANSPORT calculation?

Thanks,

Xuan

–
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.
For more options, visit https://groups.google.com/d/optout.

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Thank you very much for the suggestion.

I have the following pcs file. However it stopped when I run the model. Looks like ogs want more to finish the reading of PCS.

ogs: output

Data input:
GEOLIB::readGLIFile open stream from file abdulLab.gli … done
read points from stream … ok, 7 points read
read polylines from stream … ok, 9 polylines read
read surfaces from stream … triangulation of surface: … done - 2 triangles
ok, 1 surfaces read
PCSRead …

.pcs file

GeoSys-PCS: Processes ------------------------------------------------

#PROCESS
$PCS_TYPE
RICHARDS_FLOW
$NUM_TYPE
NEW
$PRIMARY_VARIABLE
PRESSURE1

#PROCESS
$PCS_TYPE
OVERLAND_FLOW
$NUM_TYPE
NEW
$PRIMARY_VARIABLE
HEAD

#PROCESS
$PCS_TYPE
MASS_TRANSPORT
$NUM_TYPE
NEW
$PRIMARY_VARIABLE
CONCERNTRATION1

#PROCESS
$PCS_TYPE
MASS_TRANSPORT
$DEACTIVATED_SUBDOMAIN
1;
2;

#STOP

On Thursday, December 11, 2014 1:17:48 AM UTC-5, Marc Walther wrote:

–

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9

Good!

···

Am 11.12.2014 17:16 schrieb “Xuan Yu” xuanyupsu@gmail.com:

I see. I only have one mass transport process.

So I think the subkeyword is DEACTIVATE_SUBDOMAIN. Now, the ogs went through.

Thanks,

#PROCESS
$PCS_TYPE
RICHARDS_FLOW
$NUM_TYPE
NEW
$PRIMARY_VARIABLE
PRESSURE1

#PROCESS
$PCS_TYPE
OVERLAND_FLOW
$NUM_TYPE
NEW
$PRIMARY_VARIABLE
HEAD

#PROCESS
$PCS_TYPE
MASS_TRANSPORT
$PRIMARY_VARIABLE
CONCENTRATION1
$DEACTIVATE_SUBDOMAIN
1 ;number of deactivated
2 ;material group index
#STOP

On Thursday, December 11, 2014 11:08:47 AM UTC-5, Marc Walther wrote:

Ah, I think, you have to add the subkeyword DEACTIVATED_SUBDOMAIN to the correct mass transport process. Or do you have two mass transport processes?

Am 11.12.2014 17:03 schrieb “Xuan Yu” xuan...@gmail.com:

Hi Marc,
I still could not go through the pcs file after the correction of typo. The ogs still paused at the same step.
Thanks,
Xuan
#PROCESS
$PCS_TYPE
MASS_TRANSPORT
$NUM_TYPE
NEW
$PRIMARY_VARIABLE
CONCENTRATION1

#PROCESS
$PCS_TYPE
MASS_TRANSPORT
$DEACTIVATED_SUBDOMAIN
1 ;number of deactivated
2 ;material group index
#STOP

On Thursday, December 11, 2014 10:46:09 AM UTC-5, Marc Walther wrote:

You have a typo in the mass transport pcs: it is CONCENTRATION1.

Am 11.12.2014 16:43 schrieb “Xuan Yu” xuan...@gmail.com:

Thank you very much for the suggestion.

I have the following pcs file. However it stopped when I run the model. Looks like ogs want more to finish the reading of PCS.

ogs: output

Data input:
GEOLIB::readGLIFile open stream from file abdulLab.gli … done
read points from stream … ok, 7 points read
read polylines from stream … ok, 9 polylines read
read surfaces from stream … triangulation of surface: … done - 2 triangles
ok, 1 surfaces read
PCSRead …

.pcs file

GeoSys-PCS: Processes ------------------------------------------------

#PROCESS
$PCS_TYPE
RICHARDS_FLOW
$NUM_TYPE
NEW
$PRIMARY_VARIABLE
PRESSURE1

#PROCESS
$PCS_TYPE
OVERLAND_FLOW
$NUM_TYPE
NEW
$PRIMARY_VARIABLE
HEAD

#PROCESS
$PCS_TYPE
MASS_TRANSPORT
$NUM_TYPE
NEW
$PRIMARY_VARIABLE
CONCERNTRATION1

#PROCESS
$PCS_TYPE
MASS_TRANSPORT
$DEACTIVATED_SUBDOMAIN
1;
2;

#STOP

On Thursday, December 11, 2014 1:17:48 AM UTC-5, Marc Walther wrote:

In addition to what Wenje said: you don’t have to give a specific process to the mesh file. If non is given, every process will be calculated on the whole mesh. Then, you can also use the keyword $DEACTIVATED_SUBDOMAIN, if you don’t want every process to be calculated.

Best,

Marc

Am 11.12.2014 04:20 schrieb “Wenjie Xu” wenji...@gmail.com:

Hi Xuan,

You can try the subkeyword “$DEACTIVATED_SUBDOMAIN” in .pcs file like

#PROCESS

$PCS_TYPE

MASS_TRANSPORT

$DEACTIVATED_SUBDOMAIN

1 ;number of deactivated

0 ;material group index

Best regards,

Wenjie

发件人: ogs-...@googlegroups.com [mailto:ogs-...@googlegroups.com] 代表 Xuan Yu
发送时间: 2014年12月11日 8:10
收件人: ogs-...@googlegroups.com
主题: [ogs-users] coupled processes

Hi all,

I have a question on variable density flow. So in the msh, we define the flow type at model domain: Richards_Flow, Groundwater_Flow. Where to define the MASS_TRANSPORT? Or is MASS_TRANSPORT will happen across the whole domain? Can we define a part of the domain has the MASS_TRANSPORT calculation?

Thanks,

Xuan

–
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10

Hello OGS community,
I model unsaturated RICHARDS_Flow within a 2D domain and OGS crashes when assembling the equation system (please see attached image for a screenshot of the executable). First I thought it would be a solver issue, but varying the solvers didn't make it.

Does anyone have experience with such a problem?

Cheers
Aaron

OGS_crash.JPG978×1149 131 KB

11

Hi Aaron,

if you could provide the input data, I can have a look on it.

Best

Jobst

···

2014-12-16 15:18 GMT+01:00 Aaron Peche peche@hydromech.uni-hannover.de:

Hello OGS community,

I model unsaturated RICHARDS_Flow within a 2D domain and OGS crashes when assembling the equation system (please see attached image for a screenshot of the executable). First I thought it would be a solver issue, but varying the solvers didn’t make it.

Does anyone have experience with such a problem?

Cheers

Aaron

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12

Check your mesh file. There are zero volume elements in the mesh.

···

On 12/16/2014 03:18 PM, Aaron Peche wrote:

Hello OGS community,
I model unsaturated RICHARDS_Flow within a 2D domain and OGS crashes when assembling the equation system (please see attached image for a screenshot of the executable). First I thought it would be a solver issue, but varying the solvers didn't make it.

Does anyone have experience with such a problem?

Cheers
Aaron

13

Yes, that was it! Thanks Wenqing

···

Am 12/16/2014 um 3:50 PM schrieb Wenqing Wang:

Check your mesh file. There are zero volume elements in the mesh.

On 12/16/2014 03:18 PM, Aaron Peche wrote:

Hello OGS community,
I model unsaturated RICHARDS_Flow within a 2D domain and OGS crashes when assembling the equation system (please see attached image for a screenshot of the executable). First I thought it would be a solver issue, but varying the solvers didn't make it.

Does anyone have experience with such a problem?

Cheers
Aaron

--
Aaron Peche (M.Sc.)
PhD Student
Institute of Fluid Mechanics and Environmental Physics
Leibniz-Universität Hannover

E-Mail: peche@hydromech.uni-hannover.de