[TommyM]

Hi All,

I am modeling a fluid-structure interaction where the fluid causes the deformation of the solid, such deformation affects the flow field and the cycle is repeated.
Thus, it is necessary a mesh morphing to account for the change in the fluid domain shape.

I do not understand if STAR is able to perform the entire analysis internally.
I know this is possible via co-simulation (for example, with Abaqus), maybe it is possible to perform a co-simulation with STAR itself.

But is it possible to create a model that considers these features in a single simulation?
(I know STAR has the "two-way coupling" capability so I imagine it can do it, but I did not found anything on the guides about it).

Thanks for your attention,

Tommy

[cwl]

User Guide: Tutorials -> Solid Stress -> Fluid Structure Interaction: Vibrating Pipe

[TommyM]

Hi Chaotic Water,

thanks for your reply. Moreover, sorry, I should have looked at that tutorial better.

Since I am dealing with a FSI simulation, I am trying to understand which approach is the best one to study a dynamic analysis (something similar to this one: Tutorials > Coupling with CAE Codes > Abaqus Co-Simulation: Mechanical Coupling).

The possible methods I found are:
1) Co-simulation with external code (in my case, Abaqus).
2) Simulation entirely run in STAR-CCM+.
3) Co-simulation with STAR-CCM+.

I think the co-simulation with Abaqus could be the best choice since its FEM capabilities are better than STAR's. Is there a particular approach you suggest?

Thank you!

Tommy

[TommyM]

Originally Posted by TommyM

Hi Chaotic Water,

thanks for your reply. Moreover, sorry, I should have looked at that tutorial better.

Since I am dealing with a FSI simulation, I am trying to understand which approach is the best one to study a dynamic analysis (something similar to this one: Tutorials > Coupling with CAE Codes > Abaqus Co-Simulation: Mechanical Coupling).

The possible methods I found are:
1) Co-simulation with external code (in my case, Abaqus).
2) Simulation entirely run in STAR-CCM+.
3) Co-simulation with STAR-CCM+.

I think the co-simulation with Abaqus could be the best choice since its FEM capabilities are better than STAR's. Is there a particular approach you suggest?

Thank you!

Tommy

Hi All,

I have been reading about this topic and I found the following conclusions:

1) Co-simulation with external code (Abaqus) has the advantage of using a high level FEM code to solve solid mechanics, thus it is recommended whenever the mechanical analysis is complex.
On the other hand, it requires an additional license and additional setup for the Abaqus settings.

2) Co-simulation with STAR-CCM+ has the only (I guess) advantage of splitting the time-scales, i.e. you can use a time-step size for fluid dynamics and another one for solid mechanics.

3) Simulation entirely run in STAR-CCM+ is good but its capabilities are lower than Abaqus' when it comes to FEM. Furthermore, shells cannot be used to simulate solid displacements.
Anyway, its settings are simpler due to the fact all the simulation is set in the same software.

These are my conclusions but if someone would add or correct something, please feel free to do that.

Tommy

[cwl]

Originally Posted by TommyM

Hi All,

2) Co-simulation with STAR-CCM+ has the only (I guess) advantage of splitting the time-scales, i.e. you can use a time-step size for fluid dynamics and another one for solid mechanics.

From what I understand multiple (different) time scales which were introduced recently are available for fluid and solid (thermal) models - and for solid (stress) models as well.