Learning Forum

[Sam001]

Hi,

   Please, do you have an idea what might be causing this Error: Exception of type 'Ansys.Fluent.Cortex.Cortex not availableException' was thrown.

Thanks

[Rob]

Cortex is what Fluent uses in the background and it also has something to do with the graphics: for some reason it's really not happy with your system. 

I'll move to Installation as Win will know how to fix it. 

[tsiriaks]

I can help checking the graphics/OS info.

Sam001, please post the output of the following commands

cat /etc/*release

lspci -vnn | grep VGA -A 12

glxinfo | grep OpenGL

 

Also, just to make sure, have you tried other models/geometries ? Does this issue happen to all of them ?

Thanks,

Win

 

[Sam001]

Dear Win,

               The result of the commands are attached.

Thanks,

Sam 

[tsiriaks]

CentOS 7.6 is not supported in current versions. It's planned to be supported in 2019R2 but still not 100%, ref:

https://www.ansys.com/-/media/ansys/corporate/files/pdf/solutions/it-professionals/platform-support/ansys-platform-support-strategy-plans-february-2019.pdf?la=en

If you can find other machine with supported OS as shown in the doc, that would be ideal. If not, make sure you are using ANSYS 2019 R1 

In either case, make sure you have all prerequisites installed according to Chapter 2 of the Linux installation guide 

https://support.ansys.com/portal/site/AnsysCustomerPortal/template.fss?file=/ANSYS+Customer+Portal/staticassets/GettingStarted/2019-R1-ANSYS-Installation-Guides.pdf

Aside from the OS and prerequisites, your graphics card is also not supported, ref:

https://www.ansys.com/-/media/ansys/corporate/files/pdf/solutions/it-professionals/platform-support/graphics-cards-tested-2019-r1.pdf?la=en

for this issue, you can try the following workaround (change version and installation path accordingly)

export LIBGL_ALWAYS_INDIRECT=1

export LIBGL_ALWAYS_SOFTWARE=1

export LD_LIBRARY_PATH=/ansys_inc/v193/Framework/bin/Linux64/Mesa

/ansys_inc/v193Framework/bin/Linux64/runwb2 -oglmesa

Thanks,

Win

 

[Sam001]

Dear Win,

              It worked!, but I think the error I have now is based on the memory as shown below, I discovered I can't use the a single node to run Ansys fluent GUI with the large mesh file, but rather multiple nodes through commands lines.

I think I would need some examples of command lines for heat exchangers!, Please, can you guys help with that?

Thanks,

Sam

 

[tsiriaks]

Hi Sam,

That's great to hear !

When do you see this error (starting Fluent, meshing, solving) ?

If during the solve, I would recommend to try with a very small project to see if everything is working correctly. Once you verify this, then you can create a new thread under Physics Simulation ->  Fluid Dynamics section  to ask for help about the memory issue.

Thanks,

Win

[Sam001]

Dear Win,

             During the Launch of fluent (set-up on workbench), when reading the mesh files (FFF.msh). I tried it for a lower mesh size( with lower number of elements) for the same geometry and it worked. 

Thanks,

Sam

 

[Sam001]

Dear Win,

              Also can you help transfer the discussion to Physics simulation > fluid Dynamics section, so they can have any idea of what is going on?

Thanks,

Sam 

[tsiriaks]

Hi Sam,

Ah I see. Thanks for the info. This does seem to require help from  Fluid Dynamics section

I would recommend to mark this one as resolved (Is Solution) for the Cortex issue since it's a separate issue. Then, create a new thread in that section. If you like to reference some info here, you can provide the link to this thread in that new thread.

Thanks,

Win

[jainanup27]

Hi,

I am facing the same error but the case is different. I am doing optimization for the 2D case. My workflow is Design Modeler --> ICEM CFD --> Fluent. Once the design points are generated and I update the project for optimization I get the error :

''Update of the Solution component in Fluent for Design Point 1 failed: Update Solution Failed: Ansys.Fluent.Cortex.CortexNotAvailableException: Exception of type 'Ansys.Fluent.Cortex.CortexNotAvailableException' 

In the progress tab, I can see that the geometry is imported correctly (I can see the Right Tick appearing) to ICEM CFD which imports model (Here also I can see the right tick) to the Setup (I get right tick here) and it then goes to the solution. When it goes to the solution in the Progress tab I can see Loading Mesh and Model information. And during this time I get the above error. 

Can you please look into it

 

Thanks,

Anup

[Sam001]

Anup,

         With my little knowledge of this problem with FLUID FLOW (FLUENT), Its always the geometry heavier(needs more RAM) than your current system configuration. You can confirm this by using the Terminal window to see the consumption of the RAM during the Loading Mesh and Model information.

Hope this helps!

Thanks,

Sam

[jainanup27]

Hi Sam001,

I have created mesh in ICEM CFD. However, during optimization my geometry parameter changes and hence the geometry . I wanted to know  does the mesh also change everyitme with change the geometry or it remains the same as it was created during the first iteration run. It seems that mesh changes with the geometry however, the blocking remains the same and as a result I have overlapping edges and this might be causing problem. Do you know anyone from your team who answer my question on linking ICEM CFD and optmization?

 

Thanks,

Anup 

[Sam001]

Hello Anup,

                 With my experience so far, I think the mesh changes with any modification being made on the geometry unless you did change Mesh configuration setting from default to some personalized numbers (Please, take note. Its not the mesh size but other parameters).

Also, I think you should create a new discussion to draw attention of the experts/admins.

Thanks,

Sam 

[tolgaemir06]

[tsiriaks]

I'd recommend to create a simple cube, mesh and see if you get the same issue.

If so, please create a new thread in this installation section.

If not, please create a new thread in Fluids section as the issue is related to your geometry and mesh.

I'm locking this thread.

Thanks,

Win