CAFLUID
Bulk Data Entry Defines a 1D element that can conduct heat and transmit fluid between its two primary nodes.
Heat flow is due to conduction within the fluid and mass transport of the fluid.
Format
(1) | (2) | (3) | (4) | (5) | (6) | (7) | (8) | (9) | (10) |
---|---|---|---|---|---|---|---|---|---|
CAFLUID | EID | PID | G1 | G2 | G3 | G4 |
Example
(1) | (2) | (3) | (4) | (5) | (6) | (7) | (8) | (9) | (10) |
---|---|---|---|---|---|---|---|---|---|
CAFLUID | 7 | 1 | 233 | 225 | 9911 | 9912 |
Definitions
Field | Contents | SI Unit Example |
---|---|---|
EID | Unique element identification number. No default (Integer > 0) |
|
PID | PAFLUID property entry
identification number. No default (Integer > 0) |
|
G1, G2 | Grid point identification numbers of the
CAFLUID element connection points. No default (Integer > 0, G1 ≠ G2) |
|
G3, G4 | Grid point identification numbers of the ambient convection
points. Default = Blank (Integer ≥ 0) |
Comments
- The CAFLUID element represents 1D elements which can conduct heat and transmit fluid through mass flow. The PID field points to a PAFLUID Bulk Data that determines the element property.
- The mass flow rate can be defined via the W field on the referenced PAFLUID entry.
- The hydraulic diameter of flow cross-section can be defined via the D field on the referenced PAFLUID entry.
- The fluid thermal material properties are defined via the MID field on PAFLUID entry that references a MAT4 entry.
- The ambient grids G3 and G4 can be defined on SPC entries to define ambient temperatures for the CAFLUID entry.
- Additionally, the CAFLUID nodes can be defined as ambient points on the TAi fields of the CONV entry which defines as convection heat transfer interface. This allows definition of a cooling setup using CAFLUID fluid flow from a structural heat transfer interface.
- The grid temperature output for the CAFLUID nodes can be printed to the PUNCH file via THERMAL(PUNCH)=YES/SID.
- CAFLUID-based flow heat transfer is currently supported for Linear Steady-State Heat Transfer Analysis.