|December 6, 2010, 15:33||
1D Euler Boundary Conditions using Riemann Variables??
Join Date: Dec 2010
Posts: 1Rep Power: 0
I am at the moment writing a code for a uni project using a second order Lax-Wendroff scheme to model unsteady flow.
I am trying to implement boundary conditions using characteristics but am struggling....the method described by Benson for a 'closed' boundary does not produce reflections but results in big oscillations in my program:
1) Do I not need to set the temperature at the boundary to be a constant?
2) Will the homoentropic method at the boundary suffice?
I would really appreciate any help
|December 11, 2010, 17:44||
Join Date: May 2009
Location: St.Petersburg, Russia
Posts: 22Rep Power: 8
if it's subsonic INflow (M<1) then 2 constant values should be specified, usually total Entalpy and entropy
and 1 parameter should be determined by closest cell inside the domain, ususlly velocity u.
if bounday is subsonic OUTflow then 1 constant parameter
is specified - ambient pressure and 2 others are dtermined by closest cell inside the domain.
|1d euler, boundary conditions, riemann|
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