Card 9 - HEAT_LOAD Heat Load Definition

KODE

KODE is the code HEAT_LOAD (or 124)

N1

N1 is the HEAT_LOAD card ID. Cards with the same ID reference the same Heat Load simulation object.

T1 = NAME

T1 = NAME (or 1) specifies the Heat Load simulation object name in T2.

T1 = SELECTION

T1 = SELECTION (or 2) specifies a selection of elements on which the Heat Load simulation object is applied. The element selection is represented by the group name T2.

T1 = TYPE

T1 = TYPE (or 3) specifies the heat load type in T2.

• T2 = LOAD (or 1) specifies a heat load on the selected elements.
• T2 = FLUX (or 2) specifies a heat load, per unit area, on the selected elements.
• T2 = GENERATION (or 3) specifies a heat load, per unit volume, on the selected elements. For planar and beam elements, the volume is calculated by multiplying the length or area by the cross-sectional area or thickness.

T1 = MAGNITUDE

T1 = MAGNITUDE (or 4) specifies the heat load value in T2.

• If the heat load is constant, then its value is specified in T2.
• If the heat load 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. The dependent variable on the TABTYPE card is the HEAT_LOAD.
• If the heat load 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 the EXPRESSION card.

If the heat load type LOAD is not distributed per element, it is redistributed among the selected group elements in proportion to their areas or volumes as:

where:

• AV(I) is either the volume (for solid elements), or area of element I (for shells and beams), or unity (for non-dimensional elements), where I is a member of the selected group elements. All the elements of the selected group must be of the same type, for example, do not mix solid and non-solid elements.
• Q(I) is the heat load to element I, which is a member of the selected group.
• Ω(T2,X(I)) is the interpolated variable, where T2 is a table.
• n is the number of selected elements.

If T2 is a spatial table (field or EID dependent), then Q(I) is calculated with a weighting factor Ω(I) that is interpolated from this table:

When T2 includes a reference to an expression, either directly or through a table, then each spatial field, referenced in that expression is normalized by a factor that makes the area-weighted average of that field equal to one. The averaging is performed over the selected elements group.

If the selected group is a single element, the heat load is applied to the element.

T1 = DISTRIBUTION

T1 = DISTRIBUTION (or 5) specifies that the LOAD type is distributed per elements in T2. If the heat load is distributed per element over the selected elements, then T2 = PER_ELEMENT (or 1).

T1 = MULTILAYER

T1= MULTILAYER (or 6) specifies the layer for multilayer elements in T2. Non-homogeneous multilayer elements are specified on LAYER Cards, and homogeneous multilayer elements are specified on PROP Cards.

• If the heat load is applied to the top layer, then T2 = TOP (or 1).
• If the heat load is applied to the middle layer, then T2 = MIDDLE (or 2).
• If the heat load is applied to the bottom layer, then T2 = BOTTOM (or 3).
• If the heat load is applied to all layers, then T2 = ALL (or 4).
• If the heat load is applied to a specified layer, then T2 = SPECIFY (or 5) identifies the layer number in T3 and is counted from the top layer. For example, T3 = 1 is the same as T3 = TOP.

Code example

$ Heat_LOAD_BC(1)                                           
NAME2 Heat_LOAD_BC(1) Heat_LOAD_BC(1)
NAME Heat_LOAD_BC(1)        380         15          1
HEAT_LOAD 1 NAME "Heat_LOAD_BC(1)"
HEAT_LOAD 1 SELECTION "Heat_LOAD_BC(1)"
HEAT_LOAD 1 TYPE LOAD
HEAT_LOAD 1 MAGNITUDE 15
HEAT_LOAD 1 DISTRIBUTION PER_ELEMENT
HEAT_LOAD 1 MULTILAYER SPECIFY 1