Learning Forum

[Farah]

I am using FEA analysis to apply pulse pressure on my pipe with varying values of Young's modulus, presented in a tabular format. My goal is to calculate the deformation of the pipe and identify the modulus (E) that brings me closest to my target deformation. Could you advise if using an explicit solver is suitable for this situation, or if it would be better to try an implicit solver instead? I plan to use this modulus (E) for further FSI analysis, but I vaguely remember that an explicit solver might not apply uniform pressure across all regions. I would appreciate it if you could confirm or refute this.
 

Thanks!

 

[Erik Kostson]

 

 

 

Hi

This describes the difference between the two and when to consider one or the other:

https://www.ansys.com/en-gb/blog/what-is-explicit-dynamics#:~:text=While%20both%20implicit%20and%20explicit,large%20timesteps%20can%20be%20used.

https://www.youtube.com/watch?v=oRulOsX7ijk

 

 

To add since for FSI (2-way) , then Implicit will be used (Fluent – > Transient Structural via system coupling say), so that will determine that it is implicit (Transient and static struc. systems are Implicit only)

There is also ICFD in Ansys LS-Dyna coupled to structural LS-DYna/Implicit solver – 

 

https://www.youtube.com/watch?v=eLI4p5Ifcds

 

All the best

Erik