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

Load key associated with surface load (defaults to 1). Load keys (1,2,3, etc.) are listed under "Surface Loads" in the input data table for each element type in the Element Reference. LKEY is ignored if the area is the face of a volume region meshed with volume elements.

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

Surface load value or table name reference for specifying tabular boundary conditions.

If Lab = CONV, VALUE is typically the film coefficient and VALUE2 (below) is typically the bulk temperature. If Lab = CONV and VALUE = -N, the film coefficient may be a function of temperature and is determined from the HF property table for material N [MP]. (See the SCOPT command for a way to override this option and use -N as the film coefficient.) 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 = RAD, VALUE is the surface emissivity.

If Lab = PORT, VALUE is a port number representing a waveguide exterior port. The port number must be an integer between 1 and 50. For acoustic 2×2 transfer admittance matrix, the port number can be any positive integer. The smaller port number corresponds to the port 1 of the 2×2 transfer admittance matrix and the greater port number corresponds to the port 2. If one port of the transfer admittance matrix is connecting to the acoustic-structural interaction interface, the port number corresponds to the port 2 of the transfer admittance matrix. A pair of ports of the 2×2 transfer admittance matrix must be defined in the same element.

If Lab = SHLD, VALUE is the surface normal velocity in harmonic analysis and the surface normal acceleration in transient analysis for acoustics.

If Lab = IMPD, VALUE is resistance in (N)(s)/m³ if VALUE > 0 and is conductance in mho if VALUE < 0 for acoustics. In acoustic transient analyses, VALUE2 is not used.

If Lab = RDSF, VALUE is the emissivity value; the following conditions apply: If VALUE is between 0 and 1, apply a single value to the surface. If VALUE = -N, the emissivity may be a function of the temperature, and is determined from the EMISS property table for material N (MP). The material N does not need to correlate with the underlying solid thermal elements.

If Lab = FSIN in a Multi-field solver (single or multiple code coupling) analysis, VALUE is the surface interface number and LKEY is ignored. If Lab = FSIN in a unidirectional ANSYS to CFX analysis, VALUE is not used unless the ANSYS analysis is performed using the Multi-field solver.

If Lab = ATTN, VALUE is the attenuation coefficient of the surface.

Second surface load value (if any).

If Lab = CONV, VALUE2 is typically the bulk temperature for thermal analyses. For acoustic analyses, VALUE2 is not used. .

If Lab = RADVALUE2 is ambient temperature.

If Lab = SHLD, VALUE2 is the phase angle of the normal surface velocity (defaults to zero) for harmonic response analyses while VALUE2 is not used for transient analyses in acoustics.

If Lab = IMPD, VALUE2 is reactance in (N)(s)/m³ if VALUE > 0 and is the product of susceptance and angular frequency if VALUE < 0 for acoustics.

If Lab = RDSF, VALUE2 is the enclosure number. Radiation will occur between surfaces flagged with the same enclosure numbers. If the enclosure is open, radiation will also occur to ambient. If VALUE2 is negative, radiation direction is reversed and will occur inside the element for the flagged radiation surfaces.

If Lab = FSIN in a unidirectional ANSYS to CFX analysis, VALUE2 is the surface interface number (not available from within the GUI).