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Dear Chilombo,

Thank you for reaching out. I will address each of your questions in turn.

1.   and 5.  With your current AIP license, you have access to the LIR solver. The FeelMath solver is available through other license types. My colleague will write you in a separate email and give you an overview of all options.
2.   The LIR solver currently cannot handle compressible fluids. However, this will change with GeoDict 2027 (scheduled for the end of this year), you'll be able to calculate the effective stiffness with compressible fluids and benefit from noticeable faster runtimes as well.
3.   You will observe a difference in results depending on whether you incorporate compressible fluid or neglect it. The higher the bulk modulus of the fluid, the greater the difference will be.
4.   At this point, there is no reliable workaround with the LIR solver. I would strongly recommend waiting for the GeoDict 2027 release.

I hope that clears things up. Please let me know if you have any further questions.

Lilli

Hello Mark,

the easiest way update or use a material from an older GeoDict version is to copy the text file and place it in the database folder of the newer GeoDict version. If you now open the material database in the newer GeoDict version you can edit the material according to your needs and save the database. Your material will be updated to the newer GeoDict version by this step automatically and no data should be lost.

Please let me know if you have any further questions.

Best regards,
Lilli

Dear Jack Davis,

you can derive the length of a selected fiber with the following code:

Code Select Expand

Header = {'Release':'2025'}
from math import dist
gad_id        = gd.getSelectedGADObjects()
gad_parameters = gd.getGADObject(gad_id
[o], Header['Release'])
gad_point1    = gad_parameters['Point1']
gad_point2    = gad_parameters['Point2']
gad_length    = dist(gad_point1,gad_point2)*100
gd.msgBox(f'The length of the selected gad object is {gad_length}mm.')
To do this, select a fiber with GAD Object Selection and then run the script. This script gives good results for straight fibers - as in your structure. For curved fibers, you must sum the lengths of all fiber segments.

Additionally, you can extend the code to perform further analysis. Please refer to the User Guide for further information on advanced scripting in GeoDict https://geodict-userguide.math2market.de/2025/automation_pythonscripting.html

Best regards,
Lilli

Hello 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

Dear 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

Hello Jack,

yes, the noise might be also a problem.

There are some Expert Setting, which you can use in that case. Please include the attached .gps-file into the Settings > Edit Expert Settings... dialog before running the identification process once again.

Best regards,
Lilli

Hello Jack,

Thank you for reaching out.

In case of an over-segmentation we recommend reducing the threshold, as described on page 40 and 55ff. of the FiberFind user guide https://www.math2market.com/fileadmin/UserGuide/GeoDict2025/FiberFind2025.pdf.

First, you can check for a sufficient threshold by analyzing the result you already have. To do this, you can load the numpy field (as described on page 55) and find a threshold value with which the centerlines are displayed properly.

Please also note that the diameter of the fibers have to be at least 8 voxels to get an stable identification result.

I hope this helps you with your work.

Best regards,
Lilli