[Siba11]

Hi, is there any way we can get a composite cell register? Below, I have attached a photo that explains what I want.

From X=1 to X=2, I want to specify a "concentration" cutoff of 2.5. So basically, all cells in that region that exceed the cutoff will be marked.

Similarly, for X=2 to X=3, I want to keep the concentration cutoff as 5. So, in this region, only those cells will be marked which exceed this new cutoff value.

Is it possible to make this kind of composite cell register in Ansys fluent??

[AlexanderZ]

i have no idea what this "cutoff" mark means
however, you may easily put flags for cells in domain using UDMs
for example you may use C_UDMI(c,t,0) = 0 for region from x1 to x2 and C_UDMI(c,t,0) = 1 from x2 to x3 (2,5 and 5 for your case)

criteria could be coordinate or any other which you prefer