BACK* red words are TACITE's reserved words

if the simulation is not a restart :

Structure :

STABILIZE= Maximum time for stabilisation of the steady-state step

if the simulation is a restart :

RESTART= SimName_# , i.e. restart curent simulation from SimName_#

STOP_TIME= Total time of the transient simulationloop on equipments :

EQUIPMENT= Equipment name sepcified in SimName.GEO

## if it is a Source :

loop on components :

UPST_COMPi

Scenario for upstream mass flow rate of component i

end loop

Optional :

UPST_TEMP

scenario for upstream flow temperature

## if it is a Sink :

DOWN_PRES

Scenario for downstream pressure of the flow line

## if it is a Valve :

VALV_OPEN

Scenario for valve opening

## if it is an Injector :

loop on components :

INJE_COMPi

Scenario for local mass flow rate of the component i

end loop

Optional :

INJE_TEMP

Scenario for local fluid temperature

## if it is a Relief Valve :

SOUP_PRES

Scenario for local outside pressure

## if it is a Pump :

PUMP_VELO

Scenario for pump velocity

## if it is a Pig :

PIG_TOBE

Scenario to launch the pigend loop

## BACK TOP Examples

## REMARKS :

The scenario is declared with the following form. T is the time and BC the boundary condition to appy to the considered equipment.

Equipment_name

T=0 BC=10

T=T+500 BC=20

T=T+100 BC=10This mean that at T=0s after the steady state the boundary condition is set down to 10.

Then at T=500s the boundary condition is increased up to 20.

At T=600s until the end of the simulation the boundary condition equals 10.

STABILIZED= 0d0 :

If the maximum time for the steady-state is equal to 0 then the results will be saved after the first step.STABILIZED= TMd0 where TM is a positive integer :

This specifies that the steady-state step is computed until the stationnary criterion is lower than 1.e-4 or until the maximum time for stabilzation is reached.STABILIZED= -1 :

This means that the steady-state step is computed until the stationnary criterion is lower than 1.e-4. However an implicit maximum time (which is very high) is specified to the user at the begining of the computation.

Mass flow rate range : 0 < BC < 10.e3 kg/s.

Pressure imposed at the outlet of the pipe range :1.e2 < BC < 1.e9 Pa.

BC=0 means the valve is closed

BC=100 means the valve is full opened.

If a valve is located at the pipe exit it is possible to simulate a transient shutdown by closing the valve i.e. setting down BC to 0.

Mass flow rate range : 0 < BC < 10.e3 kg/s.

Mass flow rate have to be set down to 0 at T=0

Temperature range : 223 < BC < 532K.

The temperature at T=0 has no effect on the steady state computation but has to be coherent with transient scenario.

Pressure range : 1.e2 < BC < 1.e9 Pa.

The pressure at T=0 has no effect on the stready state computation but it has to be coherent with the transient scenario. i.e. the local outside pressure must be greater than internal pressure

Velocity range : 0 < BC < 150 rpm

Pig status must be 0 at T=0 qand 1 at launching time.

BACK TOPThis scenario implies :

Examples :1 2 3## Example 1 :

STABILIZE = -1

STOP_TIME = 1000EQUIPMENT = so1

---------------

UPST_COMP1

T=0 BC=0.2

T=T+100 BC=0.3

T=T+10 BC=0.4UPST_COMP2

T=0 BC=20.EQUIPMENT = si1

---------------

DOWN_PRES

T=0 BC=10d5

The steady state is computed until the stabilzation criterion is lower than1.e-4.

The total time of the transient scenario is 1000s.

The upstream mass flow rate of component 1 is initially set at 0.2 kg/s.

The upstream mass flow rate of component 2 is initially set at 20 kg/s.

The downstream pressure is set at 1.e6 Pa.

At T = 100s the upstream mass flow rate of component 1 is increased up to 0.3 kg/s.

10s after the mass flow rate is increased again up to 0.4 kg/s

## Back to prevoius lineExample 2 :

This scenario implies :

STABILIZE = 120

STOP_TIME = 10EQUIPMENT = so1

---------------

UPST_COMP1

T=0 BC=0.2

T=T+2 BC=0.3

UPST_COMP2

T=0 BC=20.

T=T+2 BC=25

EQUIPMENT = si1

---------------

DOWN_PRES

T=0 BC=10d5EQUIPMENT = rv1

-----------------

SOUP_PRES

T=0 BC=10d5

T=T+2 BC=5d5

EQUIPMENT = valv2

-----------------

VALV_OPEN

T=0 BC=50d0

T=T+2 BC=100d0

T=T+4 BC=50d0

EQUIPMENT = wpump

-----------------

PUMP_VELO

T=0 BC=100d0

The steady state is computed until the stabilzation criterion is lower than1.e-4 or the maximum time of 120s may be reached.

The total time of the transient scenario is 10s.

The upstream mass flow rate of component 1 is initially set at 0.2 kg/s.

The upstream mass flow rate of component 2 is initially set at 20 kg/s.

The downstream pressure is set at 1.e6 Pa.

The valv is 50% opened.

The Pump velocity is 100 rpm during the simulation.

At T = 2s the upstream mass flow rate of component 1 and 2 is respectively increased up to 0.3 kg/s and 25 kg/s.

The pressure of the relief valve is set down to 5.e5 Pa and the valv is fully opened.

2s after the valv is 50% shut .

## Back to prevoius lineExample 3 :

This simulation is a restart from the THER_01 simulation which total time was 1000s.

RESTART=THER_01STOP_TIME = 1200

EQUIPMENT = so1

---------------

UPST_COMP1

T=0 BC=0.2

T=T+500 BC=0.3

T=T+1000 BC=0.1

T=T+100 BC=1.UPST_COMP2

T=0 BC=20.EQUIPMENT = si1

---------------

DOWN_PRES

T=0 BC=10d5