Reply To: Y+ value variation

[SRP]

Hi,

The pressure-based solver typically uses the SIMPLE (Semi-Implicit Method for Pressure-Linked Equations) algorithm or its variants, such as PISO (Pressure-Implicit with Splitting of Operators). These algorithms are designed to solve the pressure-velocity coupling iteratively. 

The density-based solver, on the other hand, solves the compressible Navier-Stokes equations directly. It may use different numerical methods and algorithms compared to the pressure-based solver.

I suggest you to choose correct solver based on the physics you are monitoring.

You can also refer to What are pressure-based solver vs. density-based solver in FLUENT? - Ansys Knowledge

Hope this helps.