fluid solver in flow.engine for suspensions

Asked by Rioual on 2019-03-28

Hello,

My question concerns the flow engine and is the following of question 679420
(https://answers.launchpad.net/yade/+question/679420)

Apparently, it makes no difference for the fluid solver if particles are in
contact or not.
There is less validation of the local hydraulic conductivity model for very
dilute suspensions,according to Bruno.
Can you give me an idea of the range of volume fraction of particles of the suspension
for which the flow model has been validated, in yade ??

Best wishes,

Fr.

Question information

Language:
English Edit question
Status:
Solved
For:
Yade Edit question
Assignee:
No assignee Edit question
Solved by:
Chareyre
Solved:
2019-03-30
Last query:
2019-03-30
Last reply:
2019-03-29
Chareyre (bruno-chareyre-9) said : #1

Hi, it has been validated on the basis of permeameter tests, where
particles are generaly in contacts.
If you heard about data on relative movement between fluid and particles
without contacts in semi dilute regimes please let me know, that would be a
very good test case.
Bruno

Le jeu. 28 mars. 2019 11:48, Rioual <email address hidden>
a écrit :

> New question #679619 on Yade:
> https://answers.launchpad.net/yade/+question/679619
>
> Hello,
>
> My question concerns the flow engine and is the following of question
> 679420
> (https://answers.launchpad.net/yade/+question/679420)
>
>
> Apparently, it makes no difference for the fluid solver if particles are in
> contact or not.
> There is less validation of the local hydraulic conductivity model for very
> dilute suspensions,according to Bruno.
> Can you give me an idea of the range of volume fraction of particles of
> the suspension
> for which the flow model has been validated, in yade ??
>
>
> Best wishes,
>
> Fr.
>
>
> --
> You received this question notification because your team yade-users is
> an answer contact for Yade.
>
> _______________________________________________
> Mailing list: https://launchpad.net/~yade-users
> Post to : <email address hidden>
> Unsubscribe : https://launchpad.net/~yade-users
> More help : https://help.launchpad.net/ListHelp
>
>
>

Rioual (francois-rioual-v) said : #2

Hello,

  I think that the localized fluidization in a saturated granular medium has been modelized with good success compared to
experiments (?) so man can be rather optimistic...
I will let you know in case of other benchmarking in a more dilute case,

Best wishes

Fr.

Best Chareyre (bruno-chareyre-9) said : #3

In localized fluidization a cavity is forming. The large contrast in
conductivity between the cavity and the dense regions makes the result
nearly independant of conductivity in the cavity: therein the pressure is
uniform. It doesn't mean that the conductivity in the cavity is correct in
the model, it's simply irrelevant to the overall process.
Bruno

Le ven. 29 mars. 2019 15:52, Rioual <email address hidden>
a écrit :

> Question #679619 on Yade changed:
> https://answers.launchpad.net/yade/+question/679619
>
> Status: Answered => Open
>
> Rioual is still having a problem:
> Hello,
>
> I think that the localized fluidization in a saturated granular medium
> has been modelized with good success compared to
> experiments (?) so man can be rather optimistic...
> I will let you know in case of other benchmarking in a more dilute case,
>
> Best wishes
>
> Fr.
>
> --
> You received this question notification because your team yade-users is
> an answer contact for Yade.
>
> _______________________________________________
> Mailing list: https://launchpad.net/~yade-users
> Post to : <email address hidden>
> Unsubscribe : https://launchpad.net/~yade-users
> More help : https://help.launchpad.net/ListHelp
>
>
>

Rioual (francois-rioual-v) said : #4

Thanks Chareyre, that solved my question.