p54/55 control mass flux (i.e., keep mass flux constant).
ffx keeps the body force constant.
Thus, using p54/55 will definitely exhibit better control of the mass flux.
hth,
Paul
From: Nek5000-users <nek5000-users-bounces@lists.mcs.anl.gov> on behalf of nek5000-users@lists.mcs.anl.gov <nek5000-users@lists.mcs.anl.gov> Sent: Monday, August 28, 2017 10:06:23 PM To: nek5000-users Subject: [Nek5000-users] Set forcing in .rea and in .usr
Hi, Neks!
Could you please shortly explain me, what is the difference between set forcing in .rea (p54&p55) and in .usr (set_forcing) files. In fact, via testing these two options I found that in case of .rea file u_bar is kept more precisely.