[Nek5000-users] Further to ffx, ffy and ffz
nek5000-users at lists.mcs.anl.gov
nek5000-users at lists.mcs.anl.gov
Fri Mar 23 14:41:59 CDT 2018
On 2018-03-23 19:25, nek5000-users at lists.mcs.anl.gov wrote:
> Hi Paul,
>
> Thanks for your reply regarding on the questions of ''Further to the
> issue of ffx, ffy and ffz''. May I ask you if I keep p54=-3, p55=1, will
> the fluid be changed if ffx not eqauls to 0 (supposed x is streamwise
> direction) in the same time?
>
> And dear Philipp,
>
> May I know what you ususally set for the pipe flow if p54 and p55 are
> not used, fixing flow rate or fixing pressure gradient? and how you do
> you set if the flow considering the interaction between fluid and
> particles for the two-phase flow?
Hi,
we typically set fixed mass flux, using p54 and p55; sometimes with some
variants of it when the geometry requires it. Fixed pressure gradient is
typically quite slow in adapting to a given value for the friction
(Reynolds number).
For two-phase flow we usually do not change anything.
Philipp
>
> Kind regards,
>
> Zhai
>
>
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