Mechanical APDL Basic Analysis Guide - Ansys

Hint: A common error is a divide-by-zero scenario. Another common problem is a negative
primary variable; in such a case, multiply the primary variable by -1.
Saving and Retrieving Your Equation
If you intend to use an equation or part of an equation later in the function (such as in another regime),
click the STO button to store it. The numbers on the keypad change to a series of memory buffers. Click
one of them to store the equation in that memory buffer. Example: To store your equation in the Memory1
buffer, click STO and then M1.)
To retrieve a stored equation, click INV and then INS MEM, followed by the appropriate memory button.
The contents of that memory buffer are then displayed in the equation box. You can also recall an abbreviated
form of the contents by clicking RCL. If you pause the cursor over a memory button, a tool tip displays the
contents of that memory buffer.
3.2.1.1. Selecting Primary Variables in the Function Editor
You can select from among the available primary variables in the Function Editor's drop-down list. Primary
variables marked with an asterisk (*) are also available for tabular boundary conditions (BCs). The remaining
primary variables are appropriate for use with function BCs only.
• Time* (TIME)
• X location* (X) in local global coordinates
• Y location* (Y) in local global coordinates
• Z location* (Z) in local global coordinates
(coordinate system applicability is determined by the *DIM command)
• Temperature* (TEMP degree of freedom)
• Fluid temperature (TFLUID) (computed fluid temperature in FLUID116 elements for SURF151 or SURF152
elements)
• Velocity* (VELOCITY) (magnitude of the Velocity degrees of freedom or the computed fluid velocity in
FLUID116 elements)
• Applied surface pressure* (PRES)
• Tsurf* (TS) (element surface temperature for SURF151 or SURF152 elements)
• Density (ρ) (material property DENS)
• Specific heat (material property C)
• Thermal conductivity (material property kxx)
• Thermal conductivity (material property kyy)
• Thermal conductivity (material property kzz)
• Viscosity (material property µ)
• Emissivity (material property ε)
• Reference location* (Xr) (ALE formulations only)
• Reference location* (Yr) (ALE formulations only)
• Reference location* (Zr) (ALE formulations only)
• Contact gap (GAP) (used only to define radiation view factor, real constant RDVF, for contact elements
CONTA171, CONTA172, CONTA173, CONTA174, and CONTA175)
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3.2.1. How the Function Editor Works
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