Radiation Open Boundary Condition

[dhtjtks]

Hi all,
I am trying to run simple case with 100*100*10 (x,y,z) grids. It has river inflow from west side and open boundary at north, east and south. I just want to let the flow go out through open boundary because I don't have any information at those boundaries. So I used 'radiation' condition at all open boundaries. Then results showed me some reflection from boundary when I checked salinity; I used coriolis but nothing else. I think flow supposed to go out through boundary but it didn't. What is the problem?
Any help is appreciated.

Thanks,

Jungwoo
<This is my domain>
http://picasaweb.google.co.kr/jungwoo33 ... 6251203650

<This is my result>
http://picasaweb.google.co.kr/jungwoo33 ... 2018162018

<cpp options>
/* This is 'case_2'
River discharge (2cm/s)
With Coriolis
No Wind
Flat bottom
*/

#define SOLVE3D

#define ANA_GRID
#undef CURVGRID

#define MASKING
#define ANA_MASK

#define UV_ADV
#define UV_COR
#define UV_C4ADVECTION
#undef UV_SADVECTION
#undef UV_VIS2
#define UV_LOGDRAG
#define SPLINES

#define MIX_S_UV

#define TS_C4HADVECTION
#undef TS_DIF2
#define SALINITY
#define NONLIN_EOS
#define ANA_SSFLUX
#define ANA_BSFLUX
#define ANA_STFLUX
#define ANA_BTFLUX

#undef MIX_S_TS


#define MY25_MIXING

#define DJ_GRADPS

#define ANA_SMFLUX
#undef ANA_WINDS

#define ANA_INITIAL
#undef ANA_SEDIMENT

#define ANA_PSOURCE
#define UV_PSOURCE
#define TS_PSOURCE

#undef EASTERN_WALL
#define WESTERN_WALL
#undef NORTHERN_WALL
#undef SOUTHERN_WALL

#define NORTH_FSRADIATION
#define EAST_FSRADIATION
#define SOUTH_FSRADIATION
#undef ANA_FSOBC

#define NORTH_M2RADIATION
#define EAST_M2RADIATION
#define SOUTH_M2RADIATION

#define NORTH_M3RADIATION
#define EAST_M3RADIATION
#define SOUTH_M3RADIATION

#define NORTH_TGRADIENT
#define EAST_TGRADIENT
#define SOUTH_TGRADIENT
#define ANA_TOBC

#define AVERAGES
#define OUT_DOUBLE
#define AVERAGES_AKV
#define AVERAGES_AKS
#define DIAGNOSTICS_UV
#define DIAGNOSTICS_TS

[wilkin]

Try:

NORTH,SOUTH,EAST _TRADIATION (instead of gradient) and show us the results.

By the way, thanks for so clearly providing plots of your interim results. This makes it much easier to help.

John.

[dhtjtks]

Thanks John! I will try it and show you result.
Thanks again.

Jungwoo

[dhtjtks]

Try:

NORTH,SOUTH,EAST _TRADIATION (instead of gradient) and show us the results.

By the way, thanks for so clearly providing plots of your interim results. This makes it much easier to help.

John.

Hi John, I did what you said but the result was same as before. Do you have any other suggestion?

Thanks,

Jungwoo