Learning Forum

[benmilne]

Hi everyone,

 

I've been following some online tutorials to do a 2-way fsi for a rocket body using the academic research license (I'm pretty sure I've got the right license selected but not 100% sure) through my university. My issue is that when I'm ready to start the solution, I click 'update project' and almost immediately get the error:

(DP 0) Update of the Solution component in system coupling failed: The system coupling service failed to start.'

 

I've attached a screenshot of the output. I'm not sure if it's a licensing error or I've failed to put in necessary information somewhere. Does anyone know how to fix this?

 

Thanks!

 

P.S. this is the tutorial I'm following

https://www.youtube.com/watch?v=AO_n-tESNPo

[benmilne]

Additional information:

I am accessing this application over a citrix virtual desktop. I have found that system coupling is not supported for Remote Solve Manager (RSM) but I'm not sure how to check if this virtual desktop actually uses RSM. 

Does anyone know how to check this?

Thanks,

Ben

[Steve]

Hi Ben, I would recommend going over the tutorial in the Ansys documentation since there is more detail than in this video.: https://ansyshelp.ansys.com/account/secured?returnurl=/Views/Secured/corp/v201/en/sysc_tut/sysc_tut_oscplate_wb_fluent.html. 

Also, it is very important to build up the FSI simulation in stages as opposed to setting up the 2-way FSI right at the start. This document "Best Practices for Coupled Fluid-Structure Interaction (FSI)" describes this process and is available here: https://ansyshelp.ansys.com/account/secured?returnurl=/Views/Secured/corp/v201/en/sysc_ug/sysc_bestpractices_fsi.html

System Coupling is supported for RSM, but I think it would be better to use the virtual desktop. RSM is specified in Workbench when running the problem, so you would know if it's being used.

Steve

[benmilne]

Hi Steve, thanks for your response! My analyses do work independently and I am able to perform a 1-way FSI on the bodies using the fluid-solid interface tool, it just seems to be in the case of using the system coupling module. I found the RSM settings and it is off, so that doesn't seem to be the problem. The progress bar says "launching coupling service" and then fails when I try to update the project. Do you know how I can debug the cause of the failure?

I've watched about a billion videos and read documentation but I haven't been able to track down what exactly causes the error code, which is obviously a problem when trying to debug! Is there a console that outputs what Ansys is trying to do when it fails? The error code is very vague.

Thanks,

Ben

 

[Steve]

Hi Ben,

You can turn on the Debug Output, found in System Coupling tab in Workbench > Execution Control > Debug Output. Then review all the debug log files. Also review all the log files (.out, .scl, .trn) produced by System Coupling and the solvers.

Steve

[benmilne]

Hi Steve,

Because the system coupling fails to even start, it doesn't appear that the system coupling produces any log files. At least I couldn't find them in 'dp0SCSCSysC' or in 'dp0globalMECH'.

Ben

[ianbrown]

I am having a similar issue modeling a bent pipe FSI. Any help would be greatly appreciated.n

[damladrms]

Hi, did you reach any solution for that problem?n

[ag1991]

Hi, that same problem is happening to me, have you got any idea about the root causes for this issue?nI first thought it could be due to license preferences, this is why I selected the option 'use a separate license for each application', although unfortunately it didn't worked out. I have already reviewed both ANSYS Workbench and System Coupling User's Guides, but there is nothing related to this particular error. Isn't there any troubleshooting guide adressing the most commonly faced issues for System Coupling?nRegardsn

[damladrms]

Hi, did you get any solution ag1991? I am trying to solve this problem, maybe we can help to each other through this process.n

[ag1991]

Not yet, damladrms. So far I have also tested some different 2-way simulations I conducted in the past, which I know they are working fine, unfortunately, the problem is still there and System Coupling can't even start. At least, this served me on clarifying the source of the error doesn't come from my FSI settings, instead, it must be due to an internal failure, but the error message in Workbench is too vague to determine the actual source.nIt could be nice if we could try overcoming this issue, I'll let you know if I arrive to any conclusion.n

[mhn321]

I am facing the same issue regarding system coupling on Remote Solver Manager. Has anyone got any success regarding this ? Any updates ?n

[benoit.marinus]

Same issue here... Any help from Ansys on this?n