#12steps Video Tutorial Ansys Transient Thermal - How to define different temperatures on various elements on one geometry ?

First of all, U need to know what are APDL commands and what to use for. 

 The IC command in Ansys APDL is used to specify initial conditions at nodes for a static or transient analysis . It allows you to define the initial values of the degrees of freedom, such as displacements, rotations, temperatures, magnetic potentials, etc. The syntax of the IC command is:

IC, NODE, Lab, VALUE, VALUE2, NEND, NINC

where:

• NODE is the node at which the initial condition is applied. You can use ALL to apply to all selected nodes, P to enable graphical picking, or a component name.
• Lab is the degree-of-freedom label for which the initial condition is specified. You can use ALL to apply to all appropriate labels.
• VALUE is the initial value of the degree of freedom. It defaults to the program default for that degree of freedom (0.0 for structural analysis, TUNIF for thermal analysis, etc.).
• VALUE2 is the second-order degree of freedom value, mainly used for non-structural DOF where VELX can’t be used. It defaults to the program default for that degree of freedom (0.0 for structural analysis).
• NEND and NINC are optional arguments that specify the same initial condition values at a range of nodes from NODE to NEND (defaults to NODE), in steps of NINC (defaults to 1).

Some notes and examples of using the IC command are:

• The IC command is valid only for a static analysis and full method transient analysis (TIMINT,ON and TRNOPT,FULL). For the transient, the initial value is specified at the beginning of the first load step, that is, at time = 0.0 .
• Initial conditions should always be step applied (KBC,1) and not ramped .
• If constraints (D, DSYM, etc.) and initial conditions are applied at the same node, the constraint specification overrides .
• For thermal analyses, any TUNIF specification should be applied before the IC command; otherwise, the TUNIF specification is ignored .
• The degree-of-freedom values start from zero, or the first value given in the table when table name is specified .
• To match the nonzero initial condition value with the initial value for degree-of-freedom constraint, use a table for the degree-of-freedom constraint .
• The values are in the nodal coordinate system and in radians for rotational degrees of freedom .

For example, to apply an initial temperature of 100°C to all selected nodes, you can use:

IC, ALL, TEMP, 100

To apply an initial displacement of 0.01 m in the x-direction and an initial velocity of 5 m/s in the y-direction to node 5 and node 10, you can use:

IC, 5, UX, 0.01
IC, 5, VELY, 5
IC, 10,, , , 10

You can find more information about the IC command and other Ansys APDL commands in the Mechanical APDL Command Reference . You can also visit the Ansys Learning Forum  to ask questions and learn from other users. I hope this helps you understand the IC command better. 😊