HGO material parameters

[Sara Zambon]

Hello everyone,
i wanted to have a feedback on HGO (decoupled) material parameter settings:

As I set:
HGO-{
a4: / b4: / a6: / b6:
kappa: (k=0) }

Is the parameter mu appearing in the formulation (see figure) derived from "Elasticity modulus" (E) and "Poisson ratio" keywords so that mu=E/(2*(1+poisson))? That is, is mu=shear modulus of the isotropic material matrix ?

Thank you!

[David Parker]

Hi Sara,

You are correct, the parameter mu=E/(2*(1+poisson)) is used in the HGO material model. See lines 2398 and 2467 in https://github.com/SimVascular/svFSI/bl ... EADFILES.f.

These values are later used at line 190 in https://github.com/SimVascular/svFSI/bl ... ATMODELS.f

Cheers,
Dave

[Sara Zambon]

Thank you really much!
Another thing: is there a way in svFSI to set (some or all) the solver parameters available in svsolver (see figure)?
For example Residual criteria, residual control, step construction, ...

as far as I know, the available settings are:

Add equation: FSI {
Coupled: ...
Min iterations: ..
Max iterations: ....
Tolerance: ...
.....}

Tnx!

[David Parker]

Hi Sara,

All of the parameters used by svFSI are documented here https://github.com/SimVascular/svFSI/bl ... master.inp.

Cheers,
Dave

[Sara Zambon]

Ok, so there are only the abovementioned ones thanks

One last little question:
How are the "Def_Grad" array components saved? ( in struct simulations results for example)
Just to make sure the corresponding components are linked to the right array positions
(see figure)

Thank you!

Image1.png (45.57 KiB) Viewed 647 times

[David Parker]

Hi Sara,

Looking at the svFSI code in POST.f it seems that Def_Grad data is output by row: 0,1,2 / 3,4,5 / 6,7,8.

Cheers,
Dave