I am trying to simulate the flow of air at at pressure of 6 bar as attached in the figure . I have maximum wall y+ value near the inlet (around 821)

As per fluent documentation the wall y+ function should be in the range of 30 to 300 for k epsilon model

When I change my edge sizing from 200 to 100 then wall y + reduces to 774 but still doesnt come in the appropriate range

Has anyone faced such a similar issue before

Also How does the solver compute wall y + value near the inlet

Wall y+ is typicaly the distance between the wall to the first node of boundary layer

I have 5 inflation layers across my 3 walls wherein the distance of the first layer is 1e-2 with a growth rate of 1.2