[Nek5000-users] Parabolic velocity profile at channel inlet boundary

[nek5000-users at lists.mcs.anl.gov]

Hi Alok,


Assuming your inlet ranges from y = y0 to y1 and your flow is in the

x direction, the following should work in userbc:


      y0 =

      y1 =

      const =


      ux = const*(y-y0)*(y1-y)

      uy=0

      uz=0


where const is some number you choose.   You have to supply

const, y0, and y1.


Also, you must have 'v  ' boundary conditions on the inlet faces of the

elements that are at the inlet.


hth


Paul


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From: Nek5000-users <nek5000-users-bounces at lists.mcs.anl.gov> on behalf of nek5000-users at lists.mcs.anl.gov <nek5000-users at lists.mcs.anl.gov>
Sent: Thursday, August 2, 2018 5:58:57 AM
To: nek5000-users at lists.mcs.anl.gov
Subject: [Nek5000-users] Parabolic velocity profile at channel inlet boundary

Hi  Nek users,

I am trying to simulate expansion channel case in the laminar region. For the fully developed flow, the velocity profile should be parabolic at the inlet boundary. I am not able to provide Parabolic inlet profile at the inlet.  Could anyone help me with this please?

Thanks in advance

Alok Mishra

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