Learning Forum

[mezkurra]

Hello,I am performing a two-way FSI analysis using Fluent and Transient Structural. I have calculated an initial step defining Time Integration = Off in Structural solver, to achieve a steady-state solution. Now I need to restart the calculation as transient. I have followed the steps required to restart the FSI analysis from previous results. Both the fluid and structural solver are set to the same restart time, as the System Coupling service.n I've achieved to do it in some other models, but now I am getting the following error in Fluent:Error:The System Coupling Service Error Notification:Solution:anserr fatal errornError Object:()nAny help regarding this error? Thanks a lot!

[Stephen Orlando]

nCan you provide some more details on the what is happening in the initial step? Is the solid moving, or are you establishing a flow field, or both? If you only need to establish a flow field, it would be better to run a Fluent only simulation and use this as initial conditions for the 2-way FSI run.nCan you provide some screenshots of the Analysis Settings in Mechanical and in System Coupling showing the End Time?.n

[mezkurra]

Hi Array,nThank you for your answer. I want to model a vessel that contains liquid, and the pressure of the liquid is increased along the time. Instead of starting from a null pressure, I would like to start the transient simulation from a given pressure value. I want the structural simulation to begin from its deformed configuration, under the initial liquid pressure. That's why I first run an initial coupling step where the Time Integration is set to off in the transient structural simulation. The problem arises when I try to restart as a transient simulation from this steady-state simulation.nThe structural and system coupling services are both set to the same initial time. Also Fluent is ran from the solution achieved at this time. nn