Lateral Boundary Condition Type

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langlangxie
Posts: 42
Joined: Fri Jul 11, 2014 3:03 pm
Location: Hohai University

Lateral Boundary Condition Type

#1 Unread post by langlangxie »

I want to make my area are all open,this is VolCons(west) == T
VolCons(east) == T
VolCons(south) == T
VolCons(north) == T
Then I should change lateral boundary condition type:
!
! Cha Chapman
! Cla Clamped
! Clo Closed
! Fla Flather _____N_____ j=Mm
! Gra Gradient | 4 |
! Nes Nested | |
! Nud Nudging 1 W E 3
! Per Periodic | |
! Rad Radiation |_____S_____|
! Red Reduced Physics 2 j=1
! i=1 i=Lm
! W S E N
! e o a o
! s u s r
! t t t t
! h h
!
! 1 2 3 4

LBC(isFsur) == Cha Cha Cha Cha ! free-surface
LBC(isUbar) == Fla Fla Fla Fla ! 2D U-momentum
LBC(isVbar) == Fla Fla Fla Fla ! 2D V-momentum
LBC(isUvel) == RadNud RadNud RadNud RadNud ! 3D U-momentum
LBC(isVvel) == RadNud RadNud RadNud RadNud ! 3D V-momentum
LBC(isMtke) == Gra Gra Gra Gra ! mixing TKE

LBC(isTvar) == RadNud RadNud RadNud RadNud \ ! temperature
RadNud RadNud RadNud RadNud ! salinity

! Adjoint-based algorithms can have different lateral boundary
! conditions keywords.

ad_LBC(isFsur) == Clo Clo Clo Clo ! free-surface
ad_LBC(isUbar) == Clo Clo Clo Clo ! 2D U-momentum
ad_LBC(isVbar) == Clo Clo Clo Clo ! 2D U-momentum
ad_LBC(isUvel) == Clo Clo Clo Clo ! 3D U-momentum
ad_LBC(isVvel) == Clo Clo Clo Clo ! 3D V-momentum
ad_LBC(isMtke) == Clo Clo Clo Clo ! mixing TKE

ad_LBC(isTvar) == Clo Clo Clo Clo \ ! temperature
Clo Clo Clo Clo ! salinity
I change the type to be show above.but ROMS can't run ,it blow up.
Can you help me ?
thanks!

User avatar
kate
Posts: 4091
Joined: Wed Jul 02, 2003 5:29 pm
Location: CFOS/UAF, USA

Re: Lateral Boundary Condition Type

#2 Unread post by kate »

Are you sure it's blowing up on the boundary? Have you looked at the boundary conditions you are providing for it? Have you tried without the volume conservation? Were you running something similar before with more success? What did you change this time?

langlangxie
Posts: 42
Joined: Fri Jul 11, 2014 3:03 pm
Location: Hohai University

Re: Lateral Boundary Condition Type

#3 Unread post by langlangxie »

kate wrote:Are you sure it's blowing up on the boundary? Have you looked at the boundary conditions you are providing for it? Have you tried without the volume conservation? Were you running something similar before with more success? What did you change this time?
Sorry,I don't say totally,before I change lateral boundary condition type to be shown follow:
LBC(isFsur) == Clo Cha Cha Clo ! free-surface
LBC(isUbar) == Clo Fla Fla Clo ! 2D U-momentum
LBC(isVbar) == Clo Fla Fla Clo ! 2D V-momentum
LBC(isUvel) == Clo RadNud RadNud Clo ! 3D U-momentum
LBC(isVvel) == Clo RadNud RadNud Clo ! 3D V-momentum
LBC(isMtke) == Clo Gra Gra Clo ! mixing TKE

LBC(isTvar) == Clo RadNud RadNud Clo \ ! temperature
Clo RadNud RadNud Clo ! salinity

the result is abnormal,the northern of temperature is high,and ssh is big,water out without into.I think the reason for this is caused by setting boundary.
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