 transform compress turbul boundari layer transform compress turbul boundari layer transform compress turbul boundari- layer equat incompress equival demonstr analyt transform essenti laminar layer stewartson explicit relat viscos temperatur requir kei point analysi modif stream function includ fluctuat compon postul appar turbul shear associ element mass remain invari transform valu incompress friction coeffici pressur rise caus separ transform good agreement experiment measur independ report applic transform self-preserv boundari layer comput gener boundari-layer flow 