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Error 18071, and Simulation with Voxel Mesh Geometry

Altair Forum User

Hi All,

I had .raw file that contained complex biological model, and I intended to perform time-domain simulation with voxel mesh. I imported voxel mesh in CADFEKO from following dialog box:

image.png.96897e523e4944077e9a42311d6c7170.png

I had recently imported the model, but Error 18071 stated that medium with labels existed in target model.

As a result, all the dielectric media in original voxel mesh remained unrecognized.

1209184928_image(1).png.f14dba029e93e99924cbaac5753ff404.png

Currently, I am trying to import mesh of single part in model. I imported stl file of BrainWhiteMatter. However no triangles were detected as shown below.

<?xml version="1.0" encoding="UTF-8"?>

Generally I union everything, but here union of mesh file with Union1 can't be performed. Why doesn't FEKO see any triangle labels? How to make triangle labels known to FEKO?

In lack of triangle labels, I can't assign dielectric media. I can't erroneously assume that media is already assigned by looking at color assignment. When I right-click on Triangle labels, I notice that Face medium of triangles is set to PEC. I tried to change it to dielectric Brain_White_Matter in Properties dialog box, but I could select only front and back medium.

1684791775_image(1).png.1c76e76f07ef3eb3bab7e726da65c8dc.png

In practice, entire medium of mesh face should be White_Matter, but I can't see any option where I can select White_Matter.

I have attached cfx file. What can be done?

Thanks ahead of time,

FIELD FORCER

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Altair Forum User

Hi @FieldForcer

Regarding the 2nd issue with the STL file, the mesh triangles are imported as expected. There are not zero triangles, rather that is just the triangle label name. If you right click on the part in the model tree and choose mesh info you can see a summary on the model and simulation mesh histograms.

Regarding the import of the RAW file can you share the model on the forum? Alternatively, please contact your local support team for help with this.

Altair Forum User

Hi Peter,

Thanks for your response. I was advised by local support team to post here.

.raw file is 80.6MB, and limit of file size here is 48MB. As a result, I can't upload .raw file here.

I am wondering if we can work out solution with .stl file, and then take bigger file later.

FieldForcer

Altair Forum User

have you tried to zip the .raw file? you may get enough compression to post it here

Altair Forum User

Hi Peter,

I have attached compressed *.raw file herewith. Please delete brainwhitematter in Figures8Coil_MIDA.cfx, before import of *.raw mesh.

Looking forward to a breakthrough,

FieldForcer

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Altair Forum User

Could you please also attach the header file MIDA_v1.txt

Altair Forum User

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Altair Forum User

Hi @FieldForcer

The error message that you got are because the materials are already in the CADFEKO session - did you try to import the same .raw file twice - that may have caused it? If you start with a new session and reimport you should not see this error.

However, this is not why the material values are 'suspect', the reason why they are unrecognised is because the material properties are not included in the .txt file. Only the names and RGB colours to be used for the tissues are there. The exclamation mark that you see is a means of informing the user that they need to set the material prosperities.

You will need to do this either by hand (which could be tedious for all 116 tissues) or using lua script.

Altair Forum User

Halò Peter,

Mòran taing. I can't wait to indulge myself in lua programming. I began scripting right away. I opened Script Editor in CADFEKO, and imported MIDA_v1.txt file and received Error 17712. I have attached *.lua file. How shall I import properties specified in .txt file in CADFEKO model?

The error message that you got are because the materials are already in the CADFEKO session - did you try to import the same .raw file twice - that may have caused it? If you start with a new session and reimport you should not see this error.

I deleted all the material properties, and kept only one dielectric. Still I can't proceed with solution.

<?xml version="1.0" encoding="UTF-8"?>

CEM validation didn't detect any error.

image.png.37d6652c7524feb4416f4cf623b8c75e.png

Also, in .txt file should I add material properties in 4^th column before tissue names or after tissue names in 5^th column?

FieldForcer

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