Card 9 - DUCTINOUT Duct Inlet and Outlet Definition

This optional card defines flow parameters on duct nodes to model fluid movement in a duct network.

Parameters: KODE, N1, T1, T2, T3

KODE

KODE is the code DUCTINOUT (or 131)

N1

N1 is the DUCTINOUT card ID. Cards with the same ID reference the same duct inlet/outlet definition.

T1 = NAME

T1 = NAME (or 1) indicates the duct inlet or outlet name that is specified in T2.

T1 = SELECTION

T1 = SELECTION (or 2) specifies the duct inlet or outlet 0D elements. The selection is represented by the group name in T2.

T1 = VELOCITY

T1 = VELOCITY (or 3) specifies a fluid velocity at the duct inlet or outlet.

  • If the velocity is constant, then its value is specified in T2.
  • If the velocity is table dependent, then T2 is a table multiplier and T3 has the form Tn (e.g. T25) where n is a table number referencing TABTYPE or FIELDTYPE cards with dependent variable as VELOC.
  • If the velocity is calculated using an expression, then T2 is an expression multiplier and T3 has the form En (e.g. E25) where n is an expression number referencing EXPRESSION card with dependent variable as VELOC.

T1 = VOLUMEFLOW

T1 = VOLUMEFLOW (or 4) specifies a volume flow rate through the duct inlet or outlet.

  • If the volume flow rate is constant, then its value is specified in T2.
  • If the volume flow rate is table dependent, then T2 is a table multiplier and T3 has the form Tn (e.g. T25) where n is a table number referencing TABTYPE or FIELDTYPE cards with dependent variable as VOLUME.
  • If the volume flow rate is calculated using an expression, then T2 is an expression multiplier and T3 has the form En (e.g. E25) where n is an expression number referencing EXPRESSION card with dependent variable as VOLUME.

T1 = MASSFLOW

T1 = MASSFLOW (or 5) specifies a mass flow through the duct inlet or outlet.

  • If the mass flow is constant, then its value is specified in T2.
  • If the mass flow is table dependent, then T2 is a table multiplier and T3 has the form Tn (e.g. T25) where n is a table number referencing TABTYPE or FIELDTYPE cards with dependent variable as MASSFL.
  • If the mass flow is calculated using an expression, then T2 is an expression multiplier and T3 has the form En (e.g. E25) where n is an expression number referencing EXPRESSION card with dependent variable as MASSFL.

T1 = PRESSURERISE

T1 = PRESSURERISE (or 6) specifies the change in pressure across the inlet or outlet.

  • If the pressure rise is constant, then its value is specified in T2.
  • If the pressure rise is table dependent, then T2 is a table multiplier and T3 has the form Tn (e.g. T25) where n is a table number referencing TABTYPE or FIELDTYPE cards with dependent variable as DELTAPT.
  • If the pressure rise is calculated using an expression, then T2 is an expression multiplier and T3 has the form En (e.g. E25) where n is an expression number referencing EXPRESSION card with dependent variable as DELTAPT.

T1 = STATICPRESSURE

T1 = STATICPRESSURE (or 7) specifies a static gauge fluid pressure at the duct inlet or outlet.

  • If the static pressure is constant, then its value is specified in T2.
  • If the static pressure is table dependent, then T2 is a table multiplier and T3 has the form Tn (e.g. T25) where n is a table number referencing TABTYPE or FIELDTYPE cards with dependent variable as PRESSURE.
  • If the static pressure is calculated using an expression, then T2 is an expression multiplier and T3 has the form En (e.g. E25) where n is an expression number referencing EXPRESSION card with dependent variable as PRESSURE.

T1 = TOTALPRESSURE

T1 = TOTALPRESSURE (or 8) specifies a total gauge fluid pressure at the duct inlet or outlet.

  • If the total pressure is constant, then its value is specified in T2.
  • If the total pressure is table dependent, then T2 is a table multiplier and T3 has the form Tn (e.g. T25) where n is a table number referencing TABTYPE or FIELDTYPE cards with dependent variable as PRESSURE.
  • If the total pressure is calculated using an expression, then T2 is an expression multiplier and T3 has the form En (e.g. E25) where n is an expression number referencing EXPRESSION card with dependent variable as PRESSURE.

T1 = TEMPERATURE

T1 = TEMPERATURE (or 9) specifies a temperature at the duct inlet or outlet.

  • If the temperature is constant, then its value is specified in T2.
  • If the temperature is table dependent, then T2 is a table multiplier and T3 has the form Tn (e.g. T25) where n is a table number referencing TABTYPE or FIELDTYPE cards with dependent variable as TEMP.
  • If the temperature is calculated using an expression, then T2 is an expression multiplier and T3 has the form En (e.g. E25) where n is an expression number referencing EXPRESSION card with dependent variable as TEMP.

T1 = EXTTOTALPRESSURE

T1 = EXTTOTALPRESSURE (or 10) specifies an external total pressure at the duct inlet or outlet.

  • If the external total pressure is constant, then its value is specified in T2.
  • If the external total pressure is table dependent, then T2 is a table multiplier and T3 has the form Tn (e.g. T25) where n is a table number referencing TABTYPE or FIELDTYPE cards with dependent variable as PRESSURE.
  • If the external total pressure is calculated using an expression, then T2 is an expression multiplier and T3 has the form En (e.g. E25) where n is an expression number referencing EXPRESSION card with dependent variable as PRESSURE.

Code example


DUCTINOUT 4 NAME "Velocity (Duct In-Out - Expression)"
DUCTINOUT 4 SELECTION "Velocity"
EXPRESSION 5 VELOC ( 1.0 + ( 0.1 * cos( ( ( ( 360.0 * (time) ) * 5.0 ) / 1.0 ) * 0.0174533 ) ) ) * 1000
DUCTINOUT 4 VELOCITY  1.000000E+00 E5
DUCTINOUT 4 TEMPERATURE  1.000000E+01