How to apply different initial values (initialization) to different areas of a mesh in ANSYS Fluent

In this Fluent Tips & Tricks video, we show how different initial values (initialization) can be applied to different areas of a mesh. The standard initialization populates the mesh with a constant initial value everywhere. This is not always desirable. For example, having different values in different areas of the mesh would be especially useful for cases with multiple bodies start at different temperatures, or free surface flows where certain areas start with liquid and others start with air.
Although User Defined Functions (UDF’s) can be used to do this through the define_init macro, for simple cases UDFs are overkill. As such, functionality in the Fluent GUI called “Patch” can be used to achieve different initial values in different areas.
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[@nonewsman]

Awesome video.. Very clear snd useful

[@ivannepomnyashchikh7945]

Really nice. Thank you very much - helped me a lot. I was wondering if you have time to upload a tutorial on using UDFs for initialization please.

[@sedatarslan3994]

thanks man it helped a lot!!

[@ryankaushal2767]

thank you so much... really nice

[@obadaalkhamis3680]

thanks bro for this good video < could you briefly describe the difference between hybrid and standard

[@astafzciba]

so you created two solids right? but when you try to simulate, how can you make the flow go from one solid to another?

[@saurabhsonkar6080]

Can we specify as initial value according to some polynomial across the length of the domain

[@danielortiza.6389]

Can you help me please?, is a emergency, i need to define a UDF!!!