sfl

Mapdl.sfl(line='', lab='', vali='', valj='', val2i='', val2j='', **kwargs)

Specifies surface loads on lines of an area.

APDL Command: SFL

Parameters:

line

Line to which surface load applies. If ALL, apply load to all selected lines [LSEL]. If Line = P, graphical picking is enabled and all remaining command fields are ignored (valid only in the GUI). A component name may be substituted for Line.

lab

Valid surface load label. Load labels are listed under “Surface Loads” in the input table for each element type in the Element Reference.

vali, valj

Surface load values at the first keypoint (VALI) and at the second keypoint (VALJ) of the line, or table name for specifying tabular boundary conditions. If VALJ is blank, it defaults to VALI. If VALJ is zero, a zero is used. If Lab = CONV, VALI and VALJ are the film coefficients and VAL2I and VAL2J are the bulk temperatures. To specify a table, enclose the table name in percent signs (%), e.g., %tabname%. Use the *DIM command to define a table. If Lab = CONV and VALI = -N, the film coefficient may be a function of temperature and is determined from the HF property table for material N [MP]. If Lab = RAD, VALI and VALJ values are surface emissivities and VAL2I and VAL2J are ambient temperatures. The temperature used to evaluate the film coefficient is usually the average between the bulk and wall temperatures, but may be user defined for some elements. If Lab = RDSF, VALI is the emissivity value; the following condition apply: If VALI = -N, the emissivity may be a function of the temperature and is determined from the EMISS property table for material N [MP]. If Lab = FSIN in a Multi- field solver (single or multiple code coupling) analysis, VALI is the surface interface number. If Lab = FSIN in a unidirectional ANSYS to CFX analysis, VALJ is the surface interface number (not available from within the GUI) and VALI is not used unless the ANSYS analysis is performed using the Multi-field solver.

val2i, val2j

Second surface load values (if any). If Lab = CONV, VAL2I and VAL2J are the bulk temperatures. If Lab = RAD, VAL2I and VAL2J are the ambient temperatures. If Lab = RDSF, VAL2I is the enclosure number. Radiation will occur between surfaces flagged with the same enclosure numbers. If the enclosure is open, radiation will occur to the ambient. VAL2I and VAL2J are not used for other surface load labels. If VAL2J is blank, it defaults to VAL2I. If VAL2J is zero, a zero is used. To specify a table (Lab = CONV), enclose the table name in percent signs (%), e.g., %tabname%. Use the *DIM command to define a table.

Notes

Specifies surface loads on the selected lines of area regions. The lines represent either the edges of area elements or axisymmetric shell elements themselves. Surface loads may be transferred from lines to elements with the SFTRAN or SBCTRAN commands. See the SFE command for a description of surface loads. Loads input on this command may be tapered. See the SFGRAD command for an alternate tapered load capability.

You can specify a table name only when using structural (PRES) and thermal (CONV [film coefficient and/or bulk temperature], HFLUX), and surface emissivity and ambient temperature (RAD) surface load labels. VALJ and VAL2J are ignored for tabular boundary conditions.

This command is also valid in PREP7.