 skin-friction heat transfer characterist laminar boundari layer cylind axial incompress flow skin-friction heat transfer characterist laminar boundari layer cylind axial incompress flow solut case laminar boundari layer incompress fluid constant properti exterior cylind flow parallel cylind axi case differ blasiu solut flow flat plate consid curvatur plane transvers flow direct local skin-friction heat-transfer coeffici prandtl number 0 715 evalu compar magnitud flat plate flow curvatur practic case recoveri factor evalu quantiti insensit curvatur boundari 