Which version of ANSYS is having least number of bugs????

Naveen Kumar Gulla · February 26, 2018, 23:41

Can anyone suggest me which version of ANSYS is better with less number of bugs

Far · February 27, 2018, 03:35

I did not find any bugs in any version. However some options may be just included in some version and later they were improved.

obscureed · February 27, 2018, 13:11

My experience is very different from Far's -- seriously, you've never found a single bug?? Even so, I reach a similar conclusion: go for the most recent version (currently 19.0). There is an argument that it causes needless uncertainty to change versions in the middle of a project.

I have fond memories of version 6.3.26, or maybe even 6.2.16, but I suspect that I would get a shock if I tried to read (let alone run) a large case into one of those versions.

Changing the question: I'm sure that people could swap horror stories of the *worst* version of Fluent (or in particular the ANSYS Workbench workflow involving ANSYS Meshing and Fluent), possibly homing in on version 11. But they are past history. Seriously, if anyone is still using a version more than 5 years old, you can save yourself a lot of pain by upgrading.

Ed

Far · February 27, 2018, 14:03

Well, people are still using Gambit and Fluent 6.3, 14, 15 etc.

My student is in China and his professor is still using Gambit. He also says people in General electric (some departments) are still using gambit and old Fluent.

It is true too. You can find excellent papers solved on version Fluent 6 or Fluent 6.1 or 6.2. And I dont see any difference in results for those cases on latest version 19.0.

There are improvements. For example now you can use both DPM and VOF in one simulation. Now we have transition models. Now we have two way FSI.

Space claim is there. ICEM CFD is there. So definitly there are improvement, but mostly they are in direction to make user experience more smooth and easier. Naveier stokes are not going for next centruy too and they were true since their discovery.

Gert-Jan · March 12, 2018, 10:37

Go to ANSYS support to find the Class 3 Error reports.
There errors are reported that are misleading, in the sense that the software seems to work without problems, but provide wrong results. That are real errors.

Then there are irritating bugs. Lots can be found in fluent.
I can't stand the message anymore, saying: "the Fl process could not be started".
Or "CX1820 stopped working". And they pop-up for no reason. Seems have to do with the ancient GUI.
Not sure it the errors reduce with the latest version. I only started using Fluent since 2015.

Certainly there are also bugs in CFX, but less in my opinion. When CFX halts, mostly the user is to blame (read: me).

Christophe · March 12, 2018, 20:45

My opinion (and that of others in my department) is that after 16.2 + patches, Workbench has become much less reliable. We find ourselves constantly having to just rebuild the whole analysis set up, and have tried to work through tech support to little success. Sometimes their response is just "yeah, it shouldn't do that". My theory is that they probably started outsourcing the Workbench coding around then, and started moving too fast with "new features".

February 26, 2018, 23:41	Which version of ANSYS is having least number of bugs????	#1
Naveen Kumar Gulla New Member Naveen Kumar Gulla Join Date: Jan 2018 Posts: 28 Rep Power: 8	Can anyone suggest me which version of ANSYS is better with less number of bugs

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Foam::error::PrintStack	almir	OpenFOAM Running, Solving & CFD	91	December 21, 2022 04:50
decomposePar problem: Cell 0contains face labels out of range	vaina74	OpenFOAM Pre-Processing	37	July 20, 2020 05:38
A CFX-POST error (ver 14.5.7)	wangyflp88	CFX	2	July 22, 2017 00:17
SigFpe when running ANY application in parallel	Pj.	OpenFOAM Running, Solving & CFD	3	April 23, 2015 14:53
decomposePar pointfield	flying	OpenFOAM Running, Solving & CFD	28	December 30, 2013 15:05

February 27, 2018, 03:35		#2
Far Super Moderator Sijal Join Date: Mar 2009 Location: Islamabad Posts: 4,553 Blog Entries: 6 Rep Power: 54	I did not find any bugs in any version. However some options may be just included in some version and later they were improved.

February 27, 2018, 13:11		#3
obscureed Senior Member Join Date: Sep 2017 Posts: 246 Rep Power: 11	My experience is very different from Far's -- seriously, you've never found a single bug?? Even so, I reach a similar conclusion: go for the most recent version (currently 19.0). There is an argument that it causes needless uncertainty to change versions in the middle of a project. I have fond memories of version 6.3.26, or maybe even 6.2.16, but I suspect that I would get a shock if I tried to read (let alone run) a large case into one of those versions. Changing the question: I'm sure that people could swap horror stories of the worst version of Fluent (or in particular the ANSYS Workbench workflow involving ANSYS Meshing and Fluent), possibly homing in on version 11. But they are past history. Seriously, if anyone is still using a version more than 5 years old, you can save yourself a lot of pain by upgrading. Ed

February 27, 2018, 14:03		#4
Far Super Moderator Sijal Join Date: Mar 2009 Location: Islamabad Posts: 4,553 Blog Entries: 6 Rep Power: 54	Well, people are still using Gambit and Fluent 6.3, 14, 15 etc. My student is in China and his professor is still using Gambit. He also says people in General electric (some departments) are still using gambit and old Fluent. It is true too. You can find excellent papers solved on version Fluent 6 or Fluent 6.1 or 6.2. And I dont see any difference in results for those cases on latest version 19.0. There are improvements. For example now you can use both DPM and VOF in one simulation. Now we have transition models. Now we have two way FSI. Space claim is there. ICEM CFD is there. So definitly there are improvement, but mostly they are in direction to make user experience more smooth and easier. Naveier stokes are not going for next centruy too and they were true since their discovery.

March 12, 2018, 10:37		#5
Gert-Jan Senior Member Gert-Jan Join Date: Oct 2012 Location: Europe Posts: 1,827 Rep Power: 27	Go to ANSYS support to find the Class 3 Error reports. There errors are reported that are misleading, in the sense that the software seems to work without problems, but provide wrong results. That are real errors. Then there are irritating bugs. Lots can be found in fluent. I can't stand the message anymore, saying: "the Fl process could not be started". Or "CX1820 stopped working". And they pop-up for no reason. Seems have to do with the ancient GUI. Not sure it the errors reduce with the latest version. I only started using Fluent since 2015. Certainly there are also bugs in CFX, but less in my opinion. When CFX halts, mostly the user is to blame (read: me).

March 12, 2018, 20:45		#6
Christophe Member Join Date: Jan 2015 Posts: 62 Rep Power: 11	My opinion (and that of others in my department) is that after 16.2 + patches, Workbench has become much less reliable. We find ourselves constantly having to just rebuild the whole analysis set up, and have tried to work through tech support to little success. Sometimes their response is just "yeah, it shouldn't do that". My theory is that they probably started outsourcing the Workbench coding around then, and started moving too fast with "new features".