Card 9 - EAREAFA Face Area Proportional Conductance

KODE

KODE is the code EAREAFA (or 47)

N1

N1 is an element number.

T1

T1 is a face number as defined in the diagram associated with the Card 9 - FREEFACE Element Free Face Generation. If the area proportional face conductance is applied to a shell, then T1 is ignored. If the area proportional face conductance is applied to a solid, then T1 is the face number for which the conductance is applied.

T2

T2 is 0.

T3

T3 is the table number referencing TABTYPE and TABDATA cards that defines the temperature distribution of the reference temperature of the conductance.

T4

T4 is 0.

T5

T5 is an area proportional nominal convective coefficient or a nominal emissivity for radiative coupling. For convective coupling, T5 is the nominal convective coefficient divided by the area of the face of the shell or the solid. For radiative coupling, T5 is the nominal emissivity of the shell or solid element.

T6

T6 = CONVASN convective coupling.

T6 = RADASN radiative coupling.

T7

T7 is the table number referencing TABTYPE and TABDATA cards that defines the variation of the convective coefficient for the CONVASN option or the variation of emissivity for the RADASN option. T7 is left blank for constant convective coefficient or constant emissivity.

Code example

EAREAFA 10 3 0 15 0 2.5 CONVASN
TABTYPE 15 TEMP TIME
TABDATA 15 20.  0.
$ A CONVECTIVE COUPLING OF 2.5 PER UNIT AREA IS APPLIED
$ BETWEEN FACE 3 OF SOLID ELEMENT 10 AND A CONSTANT
$ REFERENCE TEMPERATURE OF 20.
EAREAFA 20 0 0 25 0 0.5 RADASN 30
TABTYPE 25 TEMP TIME
TABDATA 25 0.   0.
TABDATA 25 10.  1.
TABTYPE 30 COND TEMP
TABDATA 30 0.8  0.
TABDATA 30 1.0  10.
$ A RADIATIVE COUPLING OF NOMINAL EMISSIVITY OF 0.5 IS
$ APPLIED TO SHELL ELEMENT 20. THE EMISSIVITY VARIES
$ FROM 0.8 TO 1.0 AND IS MULTIPLIED BY THE NOMINAL
$ VALUE. THE REFERENCE TEMPERATURE VARIES
$ FROM 0. TO 10.

Notes

When an EAREAFA card is specified, a coupling is created from the element to a reference temperature described by table T3. This table can only be expressed as temperature versus time. For constant reference temperature, only one value must be specified in the table.

For the CONVASN option, the convective coefficient is created by multiplying coefficient T5 by the area of the face of element and the interpolated value from table T7, if any. This table can only be expressed as conductance versus temperature.

For the RADASN option, the reference emissivity specified by T5 is multiplied by the interpolated value from table T7, if any. This table can only be expressed as conductance versus temperature.

When a convective or radiative coupling is created at a face of solid, a new shell element is created on the face and used to apply the coupling.