k-e and wall function and y+
 

hi everybody,


i am modeling turbulence flow in a smooth pipe.

the y+ range is 11<y+<30.

1- can i use k-epsilon model?(please tell the reason in detail)

2- which wall functions should be considered? standard or scalable?

3- and how can i sure k-epsilon is the best model?
4- what is the range of linear and log law? and which wall function should be considered for each range?

tanx for all