TIMBC

TIMBC permits the users to specify time-dependent Dirichlet boundary conditions. All values in this data block are read in free format (be careful, this record does not compatible with TOUGH3 input). The inputs either is through a file named "timbc.dat" or through the data section following this keyword. If "timvsp.dat" exists in the working folder, data are directly read from the file and the inputs in the TIMBC section will be neglected.

Record TIMBC.1

NTPTAB, T3Comp

NTPTAB number of elements with time-dependent boundary conditions.

T3Comp This parameter is optional. If T3Comp="T3", the input format will be compatible with TOUGH3 input ( see TOUGH3 user manual for details), and the following input formatting will not be applied.

Record TIMBC.2

BEleName, NBCP, NBCPV

BEleBame name of boundary element

NBCP number of times.

NBCPV numbering of primary variable that is time dependent, e.g., 1 for pressure. It can be different for different EOS module and different phase state condition.

Record TIMBC.3

TIMBCV, PGBCEL

TIMBCV the time when primary variable NBCPV at boundary element BCELM is specified.

PGBCEL value of primary variable NBCPV at boundary element BCELM at time TIMBCV. A special case will be evoked if PGBCEL<0.0. Once PGBCEL<0.0, the current element will return to regular element with a volume of abs(PGBCEL), and will not be treated as first type boundary since time TIMBCV. It is also allowed this element changes back to first type boundary again if PGBCEL become larger than 0.0 at later time.

The default phase state condition will be the current condition of the element. User may specify a new phase condition through a special case for NBCPV =2, by PGBCEL=:

0-1.0: default phase condition.

10.0+sg: two-phase condition.

20.0+xg: single gas phase condition.

30.0+xg: single aqueous phase condition.

Repeat TIMBC.3 for NBCP times.

Repeat records TIMBC.2, TIMBC.3 for all NPTTAB elements.

Used in: All EOS modules

Example

TIMBC

2 // time-dependent first-type boundary at 2 elements

ELEM1, 3, 1 // 1st element name, change at 3 times, time-dependent: 1st PV

1000.0, 1.0e7 //time1, the value of 1st primary variable at time1

2000.0, 2.0e7 //time2, the value of 1st primary variable at time2

4000.0, 2.5e7 //time3, the value of 1st primary variable at time3

ELEM2, 2, 4 // 2nd element name, change at 2 times, time-dependent: 4th PV

2000.0, 40.0 // time1, the value of 4th primary variable at time1

4000.0, 45.0 // time2, the value of 4th primary variable at time2