VOF model error:Cortex received a fatal signal (SEGMENTATION VIOLATION)

Sdezmond · November 28, 2013, 19:51

Hello all. I am having some on going issues with my VOF model. Whenever i solve a problem a new error occurs.

Currently my model stops running after only 3.4 seconds of a total 40 second run time with the error: Cortex Received a fatal signal (SEGMENTATION VIOLATION).

The model in simple terms is a 120m long by 5x5m conduit with a mass flow inlet at one end and a pressure outlet at the other. There is 1m high step before the pressure outlet to maintain water levels in the conduit. I use a UDF to raise the volume of water flowing into the model after 10 seconds and then lower it again. Shortly before this some particles are released and tracked from a point array surface in the middle of the tank. The model is meshed at 0.25m res, and the mesh is completely uniform.

I have two systems i am running the model on. One is a linux with 4 cores and plenty of RAM (i access this machine remotely so i don't know precisely how much ram, but i think it is at least 32gb). I use an academic license. The second system is a win 7 pc with only 4gb ram and a core2duo. I'm replacing this machine as it doesn't have the memory capability.

I have tried running the model in both serial and parallel, with both the UDF on, and it replaced with a constant input, and with a shorter (60m rather than 120m) geometry and I still get this error.

Prior to the error the Courant Number is 1.02, all my relaxation factors are set to 0.3. There is a spike in the residuals immediately at the point of error wit z-velocity going rapidly down and everything else up.

Any ideas on what is causing this? Any suggestions on what to try?

alinik · January 9, 2014, 12:51

any luck solving that problem?
I am receiving the exact same error when importing the grid

ChisK47 · January 27, 2014, 23:48

i have the same problem with you. if you have know the answer please help me. thank you..

ashrawage · June 17, 2014, 08:51

Guys,
Just to let you know..i talked to ANSYS recently and they said it is a developmental issue and there is nothing that you are doing incorrectly.
They said they have worked on Version 16 to get that fixed.
Hold on till then i suppose.
AJS

hospital0968 · July 20, 2017, 03:03

Quote:

Originally Posted by ashrawage

Guys,
Just to let you know..i talked to ANSYS recently and they said it is a developmental issue and there is nothing that you are doing incorrectly.
They said they have worked on Version 16 to get that fixed.
Hold on till then i suppose.
AJS

I am currently using Ansys v16.0...and I am still receiving this error haha...Any suggestions?

November 28, 2013, 19:51	VOF model error:Cortex received a fatal signal (SEGMENTATION VIOLATION)	#1
Sdezmond New Member Simon DeSmet Join Date: Feb 2013 Posts: 3 Rep Power: 13	Hello all. I am having some on going issues with my VOF model. Whenever i solve a problem a new error occurs. Currently my model stops running after only 3.4 seconds of a total 40 second run time with the error: Cortex Received a fatal signal (SEGMENTATION VIOLATION). The model in simple terms is a 120m long by 5x5m conduit with a mass flow inlet at one end and a pressure outlet at the other. There is 1m high step before the pressure outlet to maintain water levels in the conduit. I use a UDF to raise the volume of water flowing into the model after 10 seconds and then lower it again. Shortly before this some particles are released and tracked from a point array surface in the middle of the tank. The model is meshed at 0.25m res, and the mesh is completely uniform. I have two systems i am running the model on. One is a linux with 4 cores and plenty of RAM (i access this machine remotely so i don't know precisely how much ram, but i think it is at least 32gb). I use an academic license. The second system is a win 7 pc with only 4gb ram and a core2duo. I'm replacing this machine as it doesn't have the memory capability. I have tried running the model in both serial and parallel, with both the UDF on, and it replaced with a constant input, and with a shorter (60m rather than 120m) geometry and I still get this error. Prior to the error the Courant Number is 1.02, all my relaxation factors are set to 0.3. There is a spike in the residuals immediately at the point of error wit z-velocity going rapidly down and everything else up. Any ideas on what is causing this? Any suggestions on what to try?

June 17, 2014, 08:51	It is ANSYS Developer issue	#4
ashrawage Member Abhijeet Shrawage Join Date: Feb 2012 Posts: 31 Rep Power: 14	Guys, Just to let you know..i talked to ANSYS recently and they said it is a developmental issue and there is nothing that you are doing incorrectly. They said they have worked on Version 16 to get that fixed. Hold on till then i suppose. AJS

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January 9, 2014, 12:51		#2
alinik Senior Member ali Join Date: Oct 2009 Posts: 318 Rep Power: 17	any luck solving that problem? I am receiving the exact same error when importing the grid

January 27, 2014, 23:48		#3
ChisK47 New Member Christina Wahyu K Join Date: Dec 2013 Location: Indonesia Posts: 5 Rep Power: 12	i have the same problem with you. if you have know the answer please help me. thank you..