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1D Euler Boundary Conditions using Riemann Variables?? |
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December 6, 2010, 15:33 |
1D Euler Boundary Conditions using Riemann Variables??
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#1 |
New Member
Ozan
Join Date: Dec 2010
Posts: 1
Rep Power: 0 |
Hello all,
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 Thanks, Ozzy |
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December 11, 2010, 17:44 |
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#2 | |
New Member
Alexey
Join Date: May 2009
Location: St.Petersburg, Russia
Posts: 23
Rep Power: 17 |
Quote:
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. |
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1d euler, boundary conditions, riemann |
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