[Dinesh Yadav]

Sir,
I recently started working on ICEM CFD. I don't have much knowledge except the tutorial problem. I am trying to mesh a rectangular geometry having three small rectangle of different thermal conductivity inside it (Figure 1 attached, with dimensions in meter) Figure 1.jpg.
I made the geometry but i am not sure whether different material property can be applied there or not. I totally struck now and don't know how to create edges and associate them with the curves in the geometry and how to process for the particular mesh shown in Figure 1.
Please provide me your able guidance.
Thank you.

[PSYMN]

I have not looked at your example, but if you don't know how to create edges (split block) or associate edges to curves, you definitely need to spend more time with the tutorials before we can help you on CFD-Online...

As for changing the material in certain blocks, that is just a matter of right clicking on the parts branch of the tree to create a new part. Change the option to Create Blocking Material, and select the blocks to assign a new part name to... Hit apply.