Engineering Fluid Mechanics
Engineering Fluid Mechanics ENGR 335
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Mr. Walton Littel
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This 1 page Class Notes was uploaded by Mr. Walton Littel on Friday October 23, 2015. The Class Notes belongs to ENGR 335 at University of Idaho taught by Staff in Fall. Since its upload, it has received 14 views. For similar materials see /class/227749/engr-335-university-of-idaho in General Engineering at University of Idaho.
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Date Created: 10/23/15
surface resistance skinfriction drag form drag Couette flow inclined plane flow slot flow momentum integral method drag force lift force skinfriction drag orm dra pressure drag drag crisis angle of attack lift coefficient planform area ENGR 335 KEY WORDS FOR CH 9 boundary layer laminar boundary layer turbulent boundary layer boundary layer thickness local wall shear stress local shear stress coef total shear stress coef total surface resistance separation boundary layer control turbulence model viscous sublayer logarithmic layer velocity defect layer power law model leading edge boundary layer trip KEY WORDS FOR CH 11 twodimensional body end effects bluff body slender body axisymmetric body wing tip vortices stall camber STUDY QUESTIONS drag coefficient projected area vortex shedding terminal velocity 1 Each ofthe following fully developed flows have a balance between the fluid weight the surface resistance andor the pressure forces i flow down an inclined plane ii Couette flow and iii pressure driven flow between parallel plates Which forces act in each of these flows 2 Give an example of flow over an object where the skinfriction drag is negligible Give an example of flow over an object where the form drag is negligible 3 Where is the local shear stress in a boundary layer the largest Why 4 For which objects in figure 1111 is the drag coefficient roughly constant over fairly wide range of Reynolds number Why do you think that this is the case 5 You are asked to estimate the force that a river exerts on a column that supports a navigation device Describe your approach