How to calculate the first grid spacing (ds) using the NASA formula online? -- CFD Online Discussion Forums

May 20, 2009, 23:03	How to calculate the first grid spacing (ds) using the NASA formula online?	#1
Byron JI New Member JI Bai-feng Join Date: May 2009 Posts: 2 Rep Power: 0	hi ,everyone. As all known, the Enhanced wall treatment needs that the y+ must be equal to 1 or below 5. Some useful formula tools are aviable online, one is provided by NASA,as the following URL: http://geolab.larc.nasa.gov/APPS/YPlus/ For a given Reynolds number, Mach number and desired y+ value, this page will estimate the spacing normal to a solid surface required to yield 1 grid point in the laminar sublayer. Now , my problem is what is the Ref. Length meaning actually ? R.Mah likes this.

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