sffun

Mapdl.sffun(lab='', par='', par2='', **kwargs)

Specifies a varying surface load.

APDL Command: SFFUN

Parameters
lab

Valid surface load label. Load labels are listed under “Surface Loads” in the input table for each element type in the Element Reference. Issue SFFUN,STATUS to list current command settings.

par

Parameter containing list of surface load values. If Lab = CONV, values are typically the film coefficients and Par2 values (below) are typically the bulk temperatures.

par2

Parameter containing list of second surface load values (if any). If Lab = CONV, the Par2 values are typically the bulk temperatures. Par2 is not used for other surface load labels.

Notes

Specifies a surface load “function” to be used when the SF or SFE command is issued. The function is supplied through an array parameter vector which contains nodal surface load values. Node numbers are implied from the sequential location in the array parameter. For example, a value in location 11 applies to node 11. The element faces are determined from the implied list of nodes when the SF or SFE command is issued. Zero values should be supplied for nodes that have no load. A tapered load value may be applied over the element face. These loads are in addition to any loads that are also specified with the SF or SFE commands. Issue SFFUN (with blank remaining fields) to remove this specification. Issue SFFUN,STATUS to list current settings.

Starting array element numbers must be defined for each array parameter vector. For example, SFFUN,CONV,A(1,1),A(1,2) reads the first and second columns of array A (starting with the first array element of each column) and associates the values with the nodes. Operations continue on successive column array elements until the end of the column. Another example to show the order of the commands:

SFFUN does not work for tabular boundary conditions.

This command is also valid in PREP7.