Nesting models - Revision history

Sobrinho: /* Keywords in Assimilation.dat */

2017-10-23T11:44:47Z

‎Keywords in Assimilation.dat

Sobrinho: /* Setting up the files */

2017-10-23T11:42:53Z

‎Setting up the files

Guillaume at 10:49, 23 February 2012

2012-02-23T10:49:42Z

Guillaume: 1 revision

2008-12-03T10:38:57Z

1 revision

192.168.20.148 at 16:05, 29 November 2007

2007-11-29T16:05:24Z

New page

Here is a guide on configuring [[MOHID Water]] with nested models.

==In MOHID GUI==
*Create a new project in [[MOHID GUI]],
*Create a Model by inserting a new Simulation,
**Setup your model
*Create a Submodel by inserting a new Simulation from the current Simulation. The new simulation should fold into the previous one.
**Setup the model

==Setting up the files==
The whole issue is how to define the open-boundary conditions for the submodel.
Basically we suggest to use a [[Flather radiation condition]] at the open boundaries that will radiate the water level and the barotropic flux in conjunction with a flow relaxation scheme spanning a few cells from the open-boundaries to the interior for the velocities (''u'' and ''v'').

===Keywords in Hydrodynamic.dat===
In the submodel hydrodynamic file

SUBMODEL : 1

!Flather radiation scheme using the father model as a reference solution.
RADIATION : 2
LOCAL_SOLUTION : 2

!Activate the Flow relaxation scheme
DATA_ASSIMILATION : 1

===Keywords in Assimilation.dat===
In the submodel assimilation file

<beginproperty>
NAME : velocity U
UNITS : m/s
DIMENSION : 3D
OUTPUT_HDF : 1

COLD_RELAX_PERIOD : 432000
COLD_ORDER : 5

<<begin_field>>
DEFAULTVALUE : 0
INITIALIZATION_METHOD : HDF
FILE_IN_TIME : HDF
FILENAME : ../../GeneralData/Reference_vel_U.hdf5
TYPE_ZUV : z
<<end_field>>

<<begin_coef>>
DEFAULTVALUE : 1e9
TYPE_ZUV : u
FILE_IN_TIME : NONE
REMAIN_CONSTANT : 1
INITIALIZATION_METHOD : ASCII_FILE
FILENAME : ../../GeneralData/RelaxationCoefs_U.dat

<<end_coef>>

<endproperty>

<beginproperty>
NAME : velocity V
UNITS : m/s
DIMENSION : 3D
OUTPUT_HDF : 1

COLD_RELAX_PERIOD : 432000
COLD_ORDER : 5

<<begin_field>>
DEFAULTVALUE : 0
INITIALIZATION_METHOD : HDF
FILE_IN_TIME : HDF
FILENAME : ../../GeneralData/Reference_vel_V.hdf5
TYPE_ZUV : z
<<end_field>>

<<begin_coef>>
DEFAULTVALUE : 1e9
TYPE_ZUV : v
FILE_IN_TIME : NONE
REMAIN_CONSTANT : 1
INITIALIZATION_METHOD : ASCII_FILE
FILENAME : ../../GeneralData/RelaxationCoefs_V.dat

<<end_coef>>

<endproperty>

@@ Line 101: / Line 101: @@
   UNITS                   : m/s
   DIMENSION               : 2D
-−
   OUTPUT_HDF              : 1
-−
   <<begin_field>>
   DEFAULTVALUE            : 0  ! will not be read!
   TYPE_ZUV                : z
   <<end_field>>
-−
   <<begin_coef>>
   DEFAULTVALUE            : 1e9
@@ Line 117: / Line 117: @@
   <<end_coef>>
   <endproperty>
-−
   <beginproperty>
   NAME                    : barotropic velocity V
@@ Line 125: / Line 124: @@
   OUTPUT_HDF              : 1
-−
   <<begin_field>>
   DEFAULTVALUE            : 0! will not be read!
   TYPE_ZUV                : z
   <<end_field>>
-−
   <<begin_coef>>
   DEFAULTVALUE            : 1e9
@@ Line 139: / Line 138: @@
   <<end_coef>>
   <endproperty>
-−
   <beginproperty>
   NAME                    : water level
@@ Line 151: / Line 149: @@
   TYPE_ZUV                : z
   <<end_field>>
-−
   <<begin_coef>>
   DEFAULTVALUE            : 1e9
@@ Line 160: / Line 158: @@
   <<end_coef>>
   <endproperty>
-−
   <beginproperty>
   NAME                    : velocity U
@@ Line 166: / Line 164: @@
   DIMENSION               : 3D
   OUTPUT_HDF              : 1
-−
   !COLD_RELAX_PERIOD       : 43200.
   !COLD_ORDER              : 5
@@ Line 183: / Line 181: @@
   <<end_coef>>
   <endproperty>
-−
   <beginproperty>
   NAME                    : velocity V

@@ Line 19: / Line 19: @@
   !Flather radiation scheme using the father model as a reference solution.
   RADIATION         : 2
-  LOCAL_SOLUTION    : 5
+  LOCAL_SOLUTION    : 5 ! Submodel + assimilation(relaxes the solution to the father(courser grid) domain
-  !Activate the Flow relaxation scheme
+  !Activate the Flow relaxation scheme:
   DATA_ASSIMILATION : 1
 ===Keywords in Assimilation.dat===
-In the submodel assimilation file
+In the submodel assimilation file (assimilation.dat):
   <beginproperty>
   NAME                    : velocity U
@@ Line 84: / Line 92: @@
   <<end_coef>>
   <endproperty>

@@ Line 9: / Line 9: @@
 ==Setting up the files==
-The whole issue is how to define the open-boundary conditions for the submodel.
+The whole issue is how to define the open-boundary conditions for the submodel and the relaxation condition.
 Basically we suggest to use a [[Flather radiation condition]] at the open boundaries that will radiate the water level and the barotropic flux in conjunction with a flow relaxation scheme spanning a few cells from the open-boundaries to the interior for the velocities (''u'' and ''v'').
@@ Line 19: / Line 19: @@
   !Flather radiation scheme using the father model as a reference solution.
   RADIATION         : 2
-  LOCAL_SOLUTION    : 2
+  LOCAL_SOLUTION    : 5
   !Activate the Flow relaxation scheme

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