This Y+ calculator computes the required wall spacing to achieve a desired Y+ using flat-plate boundary layer theory.
Wall Spacing (Δs) Calculator
Calculate the required first layer thickness for a desired Y+ value.
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How this Y+ calculator works
This calculator works using the Schlichting and Gersten method and you can read more about the technical details of Y Plus and it’s calculation in this superb SimScale forum post.
Frequently Asked Questions
What is Y+ (Y-Plus)?
Y+ is a non-dimensional distance from the wall to the first mesh node, crucial for turbulence modeling in CFD. It determines how the boundary layer is resolved.
Why is the first cell height important in CFD?
The first cell height, or wall distance, determines the Y+ value. An appropriate Y+ is essential for accurately capturing fluid behavior near walls, which directly impacts the simulation’s overall accuracy.
