The following variables are available on all boundary wall regions.
Table 14.1: Variables On Boundary Wall Regions
|
Display Name / Internal Name |
Transfer Direction |
Tensor Type |
Extensive/Intensive |
Quantity Type |
|
force /
|
Output |
VectorXYZ* |
Extensive |
Force |
|
displacement /
|
Input |
VectorXYZ* |
Intensive |
Length |
|
temperature / |
Input |
Scalar |
Intensive |
Temperature |
|
heat flow / |
Output |
Scalar |
Extensive |
Heat Rate |
|
heat transfer coefficient / |
Output |
Scalar |
Intensive |
Heat Transfer Coefficient |
|
HTC Reference Temperature
/ |
Output |
Scalar |
Intensive |
Temperature |
For information on the data transfers supported by System Coupling for each participant in each coupling context, see the tables in System Coupling Capabilities in the System Coupling User's Guide.
Force transferred from a CFX wall boundary in a System Coupling case is, by default,
based on the solved pressure, which is relative to the specified reference
pressure. You can change the force calculation to be based on absolute pressure
by setting the expert parameter include pref in forces =
t.
Viscous forces are included in the force transferred.
The following applies in a coupled analysis where displacement is received by CFX.
The displacement data received by CFX represents the incremental displacement for the current time step (the incremental displacement since the end of the previous time step).
When the System Coupling analysis type is "general" or "steady" (as opposed to "transient"), and when CFX solves before or simultaneously to the solver sending the displacement (such as Mechanical), then during the first coupling iteration of each coupling step the displacement received is 0 [m].
CFX provides EITHER
heat flow, OR
(for cases not involving radiation) heat transfer coefficient reference temperature plus heat transfer coefficient to System Coupling.
CFX receives wall temperature from System Coupling.
For multiphase flows:
If CFX is configured to send heat flow to System Coupling, the heat flow is a bulk quantity.
If instead, CFX is configured to send the heat transfer coefficient reference temperature plus heat transfer coefficient to System Coupling, the heat transfer coefficient reference temperature and heat transfer coefficient are bulk quantities.
The received temperature is applied as a bulk temperature.