Internal flow description

The file format is described in the following sections. An example of an internal flow file is given at the end of this section.

1. File format

1.1. Heading, one input line

  • <TEXT>: character(78):

The heading will be echoed on the <prefix>_dynmod.res result file.

1.2. Unit names, one input line

UT UL UM UF

  • UT: character(6): Unit name for time

  • UL: character(6): Unit name for length

  • UM: character(6): Unit name for mass

  • UF: character(6): Unit name for force

1.3. Specification of internal flow conditions.

Data groups Specification of time… and Specification of flow conditions… (below) are repeated as many times as necessary. At least two time steps must be given.

1.3.1. Specification of time, one input line

CHIDEN TIME

  • CHIDEN: character(4):

    • = TIME

  • TIME: real: Time for the following specified flow conditions

1.3.2. Specification of flow conditions, as many input lines as needed. (Zero input lines may be given.)

IFE1 IFE2 DEN VEL

  • IFE1: integer: First flow element with these conditions

  • IFE2: integer: Last flow element with these conditions

  • DEN: real: Density of contents \(\mathrm {[M/L^3]}\)

  • VEL: real: Velocity of contents \(\mathrm {[L/T]}\)

The elements in the MRL(s) are numbered consecutively along the MRL. A table of the flow element numbering may be found on the <prefix>_stamod.res file.

1.4. End, one input line

END

2. Example

Example of nodal force file

----------------------------------------------------------------------
' heading
'----------------------------------------------------------------------
slug data
'----------------------------------------------------------------------
' UNIT NAMES SPECIFICATION
'----------------------------------------------------------------------
'ut ul um uf
 s  m  Mg kN
'----------------------------------------------------------------------
'
TIME      0.000
       1        20       0.0      100.0
TIME      100.000
       1        20       0.0      100.0
TIME      101.000
       1        20       1.0      100.0
TIME      200.000
       1        20       1.0      100.0
TIME      201.000
       1        20       0.0      100.0
TIME      300.000
       1        20       0.0      100.0
TIME      301.000
       1        20       1.0      100.0
TIME      400.000
       1        20       1.0      100.0
TIME      401.000
       1        20       0.0      100.0
TIME      500.000
       1        20       0.0      100.0
TIME      501.000
       1        20       1.0      100.0
TIME      600.000
       1        20       1.0      100.0
END