y+

Drauss

hello

i have been using the y+ calculator here for a while; i like to ask two questions:

1)does anyone knows the equations inside of the y+ calculator; i do know the text book equation but the y+ calculator asks only for Reynold, ref length and y+. i just want to build my own on excel!!

2) also for a 3-D problem of plate (ex: the floor of a room 7 x 7 m), is it okay to take the ref length as 7 m?? is 7 m a good number for any points along the floor (plate)??

3) is it acceptable to the establish grid independence by performing several computation at different first grid distance. then at the moment the results at one point does not change anymore. Take that first grid distance as the correct grid distance from the wall????? this way no need for y+