Numerical Investigation of Aerodynamic Noise Reduction of Nonpneumatic Tire Using Nonsmooth Riblet Surface

Table 2

Grid quality parameters used for sensitivity analysis.

Grid schemes	Maximum mesh size on tire surface (mm)	First layer boundary layer thickness (mm)	Number of boundary layers	Total number of grids	100 steps time (sec)
Grid 1	6	0.2	3	2,189,794	270.3
Grid 2	4	0.2	3	2,894,271	342.1
Grid 3	3	0.15	4	5,789,238	689.9
Grid 4	2	0.1	5	11,749,048	1,416.5