On Wednesday, 24 July 2013 15:52:19 UTC+5:30, Robert Cimrman wrote:
(IMHO as always when talking about NS) the pressure in incompressible NS
equations is just a Lagrange multiplier for enforcing the
constraint and it is determined up to a constant. So Dirichlet bcs are not
way to go. To impose pressure as "volumetric stress traction" you will
Neumann-type bcs (dw_surface_ltr), but be careful in deriving the weak
the NS equations - do not forget some terms from integration by parts.
On 07/24/2013 10:46 AM, Ankit Mahato wrote:
I had formulated the problem combining Navier Stokes with Energy
For that I wanted to try out Couette flow with
pressure gradient (*plane
Poiseuille flow*) with Thermal boundary conditions. For simple Couette
( pressure gradient =0 ) the code is working fine
and giving us the
velocity profile but how to do it with user
defined pressure gradient.
See Link - http://www2.mech.kth.se/~luca/Smak/rec5.pdf
which will give us velocity profile for this flow.
I tried imposing pressure boundary condition but it is not working out.
I have attached the problem file.