You can create tables of dimensionless numeric data for use with the *DIM command in Mechanical APDL scripts (which can be run via Commands (APDL) worksheets).
Tables of dimensionless variables have the following requirements and limitations:
Must contain at least one dimensionless independent variable. The maximum number of dimensionless independent variables is five.
Must contain one dimensionless dependent variable.
Units do not need to be specified.
Cannot contain other types of independent and dependent variables.