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#1
Air- and Liquid Filtration / Re: Pleated filter element wit...
Last post by Lilli Burger - September 24, 2025, 09:40:14 AMHello Mark,
yes, your understanding is correct. The pressure is applied throughout the complete structure. But for some applications you can approximate the pressure drop by applying pore pressure to the material on one side of the filter (e.g. inner side of the pleated filter). You can apply pore pressure in ElastoDict under Deformations – Macroscopic Load Case – Fluid Pressure.
In this workaround, it is important that the material on the other side of the filter is not defined as pore anymore, but e.g. as a very soft solid. Otherwise, the pore pressure would work here, too.
Best regards,
Lilli
yes, your understanding is correct. The pressure is applied throughout the complete structure. But for some applications you can approximate the pressure drop by applying pore pressure to the material on one side of the filter (e.g. inner side of the pleated filter). You can apply pore pressure in ElastoDict under Deformations – Macroscopic Load Case – Fluid Pressure.
In this workaround, it is important that the material on the other side of the filter is not defined as pore anymore, but e.g. as a very soft solid. Otherwise, the pore pressure would work here, too.
Best regards,
Lilli
#2
Air- and Liquid Filtration / Re: Pleated filter element wit...
Last post by Mark - September 22, 2025, 04:19:37 PMHello Lilli,
I assume that the pressure I can define on individual steps in ElastoDict is a static pressure that is effective throughout the entire calculation area. How can I define a pressure drop across a pleat that I have created with PleatGeo?
Best regards
Mark
I assume that the pressure I can define on individual steps in ElastoDict is a static pressure that is effective throughout the entire calculation area. How can I define a pressure drop across a pleat that I have created with PleatGeo?
Best regards
Mark
#3
Air- and Liquid Filtration / Re: Pleated filter element wit...
Last post by Lilli Burger - September 22, 2025, 02:18:24 PMDear Mark,
at the moment, a direct coupling between ElastoDict and FlowDict is not possible.
A possible workaround is to simulate the pressure drop in FlowDict and use the resulting pressure as the load input for an ElastoDict compression simulation.
Please let me know if you need any further information.
Best regards,
Lilli
at the moment, a direct coupling between ElastoDict and FlowDict is not possible.
A possible workaround is to simulate the pressure drop in FlowDict and use the resulting pressure as the load input for an ElastoDict compression simulation.
Please let me know if you need any further information.
Best regards,
Lilli
#4
Air- and Liquid Filtration / Pleated filter element with pl...
Last post by Mark - September 18, 2025, 02:11:43 PMDear GeoDict-Team,
I would like to calculate the flow through a deformed fold. Can FlowDict and ElastoDict be coupled for this purpose? Or is there another option?
I would like to calculate the flow through a deformed fold. Can FlowDict and ElastoDict be coupled for this purpose? Or is there another option?
#5
CT, µCT and FIB-SEM / Re: Surface Roughness Calculat...
Last post by Janine Hilden - August 14, 2025, 10:49:59 AMHi,
do you have a structure model where you want to add surface roughness? That can be done with GrainGeo - Roughen Surface (https://geodict-userguide.math2market.de/2025/graingeo_roughensurface.html).
Or do you have a segmented scan where the solid surface is rough and you want to somehow calculate the roughness? Is this to create a statistical digital twin? There is no direct solution for this, but using Python scripting you can optimize the structure according to the desired properties, e.g. pore size distribution or permeability.
Best regards,
Janine
do you have a structure model where you want to add surface roughness? That can be done with GrainGeo - Roughen Surface (https://geodict-userguide.math2market.de/2025/graingeo_roughensurface.html).
Or do you have a segmented scan where the solid surface is rough and you want to somehow calculate the roughness? Is this to create a statistical digital twin? There is no direct solution for this, but using Python scripting you can optimize the structure according to the desired properties, e.g. pore size distribution or permeability.
Best regards,
Janine
#6
CT, µCT and FIB-SEM / Surface Roughness Calculation
Last post by jdrunner - August 14, 2025, 01:57:24 AMGood afternoon,
We were curious if GeoDict has a known module that uses the rendered 3D volume to calculate the surface roughness. Thank you.
Respectfully,
Jack Davis
We were curious if GeoDict has a known module that uses the rendered 3D volume to calculate the surface roughness. Thank you.
Respectfully,
Jack Davis
#7
CT, µCT and FIB-SEM / Re: Tortuosity on Curved Tube
Last post by Jürgen Becker - July 31, 2025, 08:58:03 AMHi,
for diagonal pores as shown in the attached image the tortuosity computed with DiffuDict is as expected.
All alternative methods to compute tortuosity can be accessed through the Tortuosity app ( see https://geodict-userguide.math2market.de/2025/geoapp_computetortuosity.html )
Regards, Jürgen
for diagonal pores as shown in the attached image the tortuosity computed with DiffuDict is as expected.
All alternative methods to compute tortuosity can be accessed through the Tortuosity app ( see https://geodict-userguide.math2market.de/2025/geoapp_computetortuosity.html )
Regards, Jürgen
#8
CT, µCT and FIB-SEM / Tortuosity on Curved Tube
Last post by jdrunner - July 30, 2025, 11:41:19 PMHello,
We have a segmented dataset with a tube that is straight up and down and a curved tube.
When we crop to only focus on the center tube, we get a tortuosity of approximately 1.004, which is consistent with the definition of tortuosity.
However, when we run the same diffusion simulation on the curved segment, we repeatedly get 1.001. We have tried to crop out part of the top section, clean up the sample, and erode the dataset to get a focused centerline for the path to follow. None of these changed the value from 1.001.
Are there any other methods to get an accurate result for tortuosity? Thank you.
Respectfully,
Jack Davis
We have a segmented dataset with a tube that is straight up and down and a curved tube.
When we crop to only focus on the center tube, we get a tortuosity of approximately 1.004, which is consistent with the definition of tortuosity.
However, when we run the same diffusion simulation on the curved segment, we repeatedly get 1.001. We have tried to crop out part of the top section, clean up the sample, and erode the dataset to get a focused centerline for the path to follow. None of these changed the value from 1.001.
Are there any other methods to get an accurate result for tortuosity? Thank you.
Respectfully,
Jack Davis
#9
CT, µCT and FIB-SEM / Re: Multi-Directional FiberFin...
Last post by Janine Hilden - July 24, 2025, 04:51:38 PMHi Jack Davis,
Good news: using the following expert settings (Settings > Edit Expert Settings) and a threshold of 0.7 we could improve the result significantly:
[attachimg=1]
Short explanation for the chosen expert settings :
Another thing that improves the result a little bit more is to apply a "morphological closing" before using FiberFind. For this, use ProcessGeo > Morphological Operations > Dilate.
First reassign the non-fiber material to pore material (ProcessGeo - Reassign Materials & Material IDs).
Then, dilate the fiber material with the same ID.
Afterwards dilate the pore material with pore material.
Then, the fibers are little bit smoothed without losing to much of their shape.
This helps FiberFind to identify the fibers afterwards.
Best regards,
Janine
Good news: using the following expert settings (Settings > Edit Expert Settings) and a threshold of 0.7 we could improve the result significantly:
[attachimg=1]
Short explanation for the chosen expert settings :
- Reconnection Threshold: we strongly relaxed it because the fibers are very isolated and it does not connect through the pore space.
- Max Distance: this parameter is important because otherwise only the local fiber radius is considered.
- Remove Crossing Radius: this removes crossing artefacts at crossings, preventing branched fibers
- Cleanse Centerlines: this cleans the result improving the centerlines. This is needed because the fibers have such a rough surface. For this reason also a higher threshold is needed. It is easier to connect through gaps, than to resolve crossings.
Another thing that improves the result a little bit more is to apply a "morphological closing" before using FiberFind. For this, use ProcessGeo > Morphological Operations > Dilate.
First reassign the non-fiber material to pore material (ProcessGeo - Reassign Materials & Material IDs).
Then, dilate the fiber material with the same ID.
Afterwards dilate the pore material with pore material.
Then, the fibers are little bit smoothed without losing to much of their shape.
This helps FiberFind to identify the fibers afterwards.
Best regards,
Janine
#10
CT, µCT and FIB-SEM / Re: Multi-Directional FiberFin...
Last post by Janine Hilden - July 22, 2025, 03:37:50 PMDear Jack Davis,
I'm sorry for the late reply. I think it would be great if you could send the structure file. If you don't want to share it here, send it to support@math2market.de. Then, we can have a look at it.
In case the current networks cannot handle this structure, it could help if you train your own custom network using GeoDict-AI specialized on your structures.
https://geodict-userguide.math2market.de/2025/geodictai.html
There is also a tutorial for training a neural network for identifying binder. I will send you the password for unzipping the tutorial via e-mail.
https://www.gddownload.de/Tutorials/Training-Neural-Network-for-binder-identification-in-NMC-cathodes-with-GeoDictAI.zip
If you want to train your own network, I think the training data generation macro should then (at least) contain the following steps:
* use FiberGeo > Create to create the fibers https://geodict-userguide.math2market.de/2025/fibergeo_create.html
* create the fibers as close as possible to the original regarding fiber curvature, diameters, etc.
* save the structure as *.gad file (File > Save Structure as)
* use GrainGeo > Roughen Surface to roughen the surface https://geodict-userguide.math2market.de/2025/graingeo_roughensurface.html
* use GadGeo > Add & Import > Add GAD Objects from File to add the previously saved gad file to the current structure to have the gad data and the roughened data in memory at the same time https://geodict-userguide.math2market.de/2025/gadgeo_addgadfile.html
Best regards,
Janine
I'm sorry for the late reply. I think it would be great if you could send the structure file. If you don't want to share it here, send it to support@math2market.de. Then, we can have a look at it.
In case the current networks cannot handle this structure, it could help if you train your own custom network using GeoDict-AI specialized on your structures.
https://geodict-userguide.math2market.de/2025/geodictai.html
There is also a tutorial for training a neural network for identifying binder. I will send you the password for unzipping the tutorial via e-mail.
https://www.gddownload.de/Tutorials/Training-Neural-Network-for-binder-identification-in-NMC-cathodes-with-GeoDictAI.zip
If you want to train your own network, I think the training data generation macro should then (at least) contain the following steps:
* use FiberGeo > Create to create the fibers https://geodict-userguide.math2market.de/2025/fibergeo_create.html
* create the fibers as close as possible to the original regarding fiber curvature, diameters, etc.
* save the structure as *.gad file (File > Save Structure as)
* use GrainGeo > Roughen Surface to roughen the surface https://geodict-userguide.math2market.de/2025/graingeo_roughensurface.html
* use GadGeo > Add & Import > Add GAD Objects from File to add the previously saved gad file to the current structure to have the gad data and the roughened data in memory at the same time https://geodict-userguide.math2market.de/2025/gadgeo_addgadfile.html
Best regards,
Janine