Messages

[Results -> Map]

Dear Jack,

thank you for the additional information. I think changing the ball-stick model is not the only way to achieve what you want to investigate.
However, I put it on the list of feature requests, so the product management team can decide whether to implement this.

Identify Pores provides even more information besides the additional files available in the Pore Visualization tab of the Result Viewer.
In the Results -> Map subtab, all computed information can be found.
Under Derived Results > Center, you can find the center coordinates of all fitted objects. These center points are also used to create the ball-stick model. The position of the coordinates in each vector matches the index number of the pore in the Index Image (*.g32 file).
Together with Coordination Numbers you can identify which are the unconnected pores.
You can then calculate the distances, e.g., using Python scripts.


Let me know if you have additional questions!

Best regards
Anne

[Coordination Number]

Hello,

thank you for this question! Yes, the Pore-Network model (ball-stick model) output option in Identify Pores shows indeed the connected pores. Here is some more information from the user guide:

Pores are represented by spheres. The sphere centers are equal to the centers of the fit objects and their diameter equals the Equivalent Diameter (diameter of volume-equivalent sphere). The pore contacts are represented by short cylindrical fibers between the center points of the spheres. The cross-sectional area of the cylinders equals the contact area between the corresponding pores.

It has no option to do a similar model for unconnected pores. Do I understand correctly, that you would like to have a model that looks similar, but measures the distances only between unconnected pores by placing sticks between them? Maybe you can explain in more detail what exactly you want to do?

From my current understanding there are two more possibilities in GeoDict to do a distance analysis.

1. Use GeoDict Metrology (user guide) to directly measure distances in the GUI (only in 2D view mode):

2. Use the "Threshold By Scalar Value" Post-Processing option (user guide):
 

• Use the scalar value Coordination Number (numbers of contacts) and set the Manual Threshold to 0.5

• The pores are classified into two groups, one of them are the unconnected pores.
• You can load the classified pores from the result viewer as explained here
• You can then reassign the connected pores to the background ID and can do further analysis with the unconnected pores.

Maybe this is already helpful for you!
Best regards
Anne

[Interface Threshold]

Dear Jack,

at a first glance it seems to me that there are isolated pores which are fragmented and need to be merged.
You can set the Interface Threshold parameter to 0% (or close to 0%) to merge all pore fragments.
Remember that you can (and maybe have to) use different values for the different samples.

Could you please test varying the Interface Threshold and see if it is helpful?
Otherwise I would need more information about the settings you used for the analysis.

Best regards
Anne

[Minimal Pore Diameter]

Dear Jack,

there is indeed another setting that could influence the connectivity of the found pores.
In the "Initialization" panel you can define the Minimal Pore Diameter in Voxel or meters.
All unconnected (isolated) pores which have a diameter smaller than this value are neglected from the analysis.
Connected pores, that touch other pores with a larger diameter (larger than the minimal diameter) are merged with the larger pore. Thus, both pores are treated as one.

This also means that they cannot be separated by modifying the interface threshold for Reconnect Fragmented Pores.
This feature only has influence on two different pores that touch.

Please find a small example for the Minimal Pore Diameter in our User Guide (Expand the "Minimal Pore Diameter" section): https://geodict-userguide.math2market.de/2025/porodict_identifypores_poresegmentation_initialization.html

We recommend to set the Minimal Pore Diameter to the default of 2 Voxels.
Then, you can do a post-processing step (Threshold by Scalar Value), which you can use to seperate pores of different sizes and do analysis again on a subset of pores.

Please let me know if you have further questions.

Best regards
Anne

[Results - Map]

Dear Jack,

the resulting fit shapes of the fitted ellipsoids shown in the scatter plot are contained in the Result File, but a bit hidden.
In the Results - Map subtab, they are listed under the key "DerivedResults -> PoreClassification":

The position of each fit shape corresponds to the Index in the Index Image (*.g32 file) of the identified grains as well as the GAD Object ID in the Pore Fit Shapes structure file. You can load both files from the Result Viewer in the Pore Visualization tab:

I loaded the results (Index Image and fitted ellipsoids) from the results shown above. As you see, the first object is classified as sphere, and the Index from the Index Image is 1 as well as the GAD Objects ID of this pore.


I hope this explanations are helpful for you, please let me know if you have additional questions!
Best regards
Anne

[Minimal Pore Diameter]

Dear Jack,

there are some parameters which may influence the results significantly, especially if you change them.
All parameters are explained in our User Guide, which you can find here: https://geodict-userguide.math2market.de/2025/porodict_identifypores.html

First, you mentioned that you analyzed also only 3 pores of the whole sample. A crucial step is how you reduced the analysis to only those 3 pores. Can you tell how you did that (e.g. by cropping the structure, or flood-fill/reassign parts of the structure)?
Based on the observations you reported, I suppose there might be changes on the connectivity between the pores in the step of going from the whole sample to only 3 pores. There are two parameters, which might change the number of analyzed pores due to different connectivity.

One of the parameters is the Minimal Pore Diameter. Unconnected pores that are smaller than the given diameter are excluded from the analysis.
Another parameter is the Interface Threshold which defines whether two pores are merged and treated as one for the analysis or not.

Another possibility is that the volume histogram plots have different settings
In the Result Viewer you can change the Number of Bins in the volume histogram. Depending on that number the individual pores from the scatter plot might be plotted in different bins, i.e. different bars, in the volume histogram plot. Compare the results for 10 and 30 bins below.


To have a more detailed look what could cause the differences, I would need more information and maybe also the data you used.

Best regards
Anne

[Stop at Saturation]

Hi,

thanks for posting this interesting question.
There are two settings in the Capillary Pressure options dialog that influence the final saturation of a structure.

1. In the Solver Parameters tab, check if Stop at Saturation is enabled.
This causes the simulation to stop if the entered saturation of the invading fluid is reached.
Solution: disable the option Stop at Saturation

2. In the Saturation Experiment tab, check if Displaced Fluid can leave a Residual is enabled.
With this option the displaced fluid that is not connected to the displaced fluid outlet stays inside the structure and leaves a residual.
Thus, the pore space cannot be completely filled with the invading fluid.
Is it desired to allow for the displaced fluid to leave a residual?
If not, the easiest solution is to disable the option Displaced Fluid can leave a Residual
If yes, changing the boundary conditions of the domain can improve the final saturation. Set Symmetric boundaries to Displaced Fluid Outlet. Then, the displaced fluid connected to these domain boundaries can leave the structure and reduces the remaining residual.

Does this help you?
Best regards
Anne

Dear Fabiane Gommes,

you say that the Lay Length (or Length of Lay as it is called in GeoDict) has to be a multiple of the unit cell length. This is not correct. In the WeaveGeo User Guide it is stated the other way around.
When setting Length of Lay to the length of the unit cell, exactly one twist (360° rotation) of the thread is performed inside the unit cell. If the unit cell is, e.g., four times larger than the Length of Lay, then four full rotations are performed. The reason behind is, that the resulting structure in the unit cell must be periodically.

However, it is possible to enter a lay length that is larger than the unit cell length. Then, only a part of the full 360° rotation is done in the unit cell. But it depends on the geometry of the thread and its filaments which values for Length of Lay are allowed to get periodic weaves. For example, for a 1x4 rope 90° rotations are allowed, which means you can enter a lay length that is four times the unit cell length.
If a Length of Lay is entered that does not fit to an allowed rotation, the value is corrected to next feasible value. Then a warning message pops up, which I think you have received.

So, in your case, I suppose you entered a value that does not lead to a periodic structure. What you can do to find feasible values is to first create the thread without twist and see the basic geometry (how the filaments are arranged). Then you can identify which rotations lead to a periodic structure and in this way can derive feasible inputs for Length of Lay.

Attached to this post please find some slides which explain the use of Length of Lay. They also contain an example for a 1x19 rope.
Please note that in the current GeoDict version (Service Pack 3) there is a bug with the 1x19 and 7x19 rope types, where wrong rotations are allowed. This bug is already fixed and will be available with Service Pack 4 that will be released in the next weeks.

Best regards,
Anne

Dear Fabiane Gommes,

in WeaveGeo there exists another possible thread type which is called "Custom Multifil". Here you can create thread types that are not predefined in GeoDict.
The menu is structured hierarchically, so you first set the parameters of the whole thread.
Since your thread is composed of two multifilament yarns the child count of the first layer is set to two.
For each of these yarns you can separately define the number of filaments by adjusting the child count for the yarns on this layer.
In the attachment you can find an example screenshot, where the thread is composed of two multifilament yarns and each yarn has 3 filaments.

More details can be found in the WeaveGeo User Guide (https://www.math2market.com/fileadmin/UserGuide/GeoDict2023/WeaveGeo2023.pdf) on page 17ff.
I hope this helps you to generate the yarn you need.

Best regards,
Anne

Yes, you are right, but you can do the following:
In the ProcessGeo module, select the Permute submenu and click Edit. Then, select Permute and choose the X->Y->Z->X option.
Click OK and then permute. Now what used to be the Y-direction has turned into Z, while maintaining the orientation of the sample.
You can then Save and Rename the structure on your disk so that you remember this fact.
Then run AddiDict to get results on the original Y-direction.
To run AddiDict on the original X-direction, hit permute again and repeat the procedure.

Best regards,
Anne

You can decrease the necessary memory by reducing the data written to the particle trajectories file.
For a simple breakthrough curve, it is sufficient to write only the minimal information to file and thus reduce memory requirements.
You can adjust the particle trajectory data in the output parameters tab and set the "Trajectory File Accuracy" to "Minimal".

Best regards,
Anne

Hi andrefeliperav,
GeoDict still works with only cubic voxels, but there is another way to cope with your struggles. The basic idea is to put some solid material around the cylindrical image part. To achieve this there exist two different ways in GeoDict with slightly different results. Depending on your further analysis you can choose which is best suitable for you. Both methods are described in detail in the PowerPoint Slides attached to this post.
I hope this will help you. If you have any more questions, please ask again.
Best regards,Anne

Hello,
you can find the minimal system requirements and more details on our website https://www.geodict.com/GeoDict/SystemRequirements.php?=&Language=en.
For an efficient use of the BatteryDict module it might be helpful to have even more powerful technical resources. See the attached file for an overview of what we recommend.
Kind regards,Anne