Y+ Calculator 2.27

The Y+ Calculator serves as a practical tool for determining the appropriate grid spacing at a wall, enabling users to achieve a specified y+ value in viscous computational fluid dynamics (CFD) simulations. Users can input relevant flow parameters and target y+ value to efficiently obtain their required near-wall cell height.

For engineers engaged in viscous CFD analysis, accurately setting the y+ value is vital for both resolved and wall-function grid setups to ensure simulation fidelity. This calculator streamlines the process of estimating the boundary layer cell height prior to grid generation, thereby saving time and reducing manual effort.

The utility accommodates both SI and Imperial units and is capable of resetting to sea-level conditions for convenience.

This software is developed by Cadence Design Systems.

Note: The calculations are based on flat-plate boundary layer theory, as described in Frank M. White’s "Fluid Mechanics," 5th edition, page 467.