pressure coefficient on hip roof low rise building
 

hi,
i am working on fluent to obtain pressure coefficient on hip roof low rise building, i am using RNG and Ske models.. i am having a wind tunnel result of this problem...while validating ske is showing good results in leeward side while RNG is showing absurd results...kindly help me out to know which parameters i have to consider.. i also want to know how to control value of y plus above 30.....waiting for reply..thanx