 effect free stream vortic behaviour viscou boundari layer effect free stream vortic behaviour viscou boundari layer theoret investig consid two-dimension steadi flow field larg distanc finit object set viscou incompress fluid studi coordin-type expans pressur veloc larg uniformli fix reynold number assum exact boundari condit infin regular flow net mass flow simpl curv enclos object mathemat natur distinct paramet coordin-type expans discuss descript inner outer expans match techniqu featur expans procedur introduct artifici paramet inner outer expans match aid solut navier-stoke equat analysi requir simpl consider heat laplac equat resort special method paper worth studi interest asymptot expans procedur 