Fixed wall Fixed Fluid: wall
Consider steady, incompressible, parallel, laminar flow of a viscous fluid falling between two infinite vertical walls. The distance between the walls is h, and gravity acts in the negative z-direction (downward in the figure). There is no applied (forced) pressure driving the flow—the fluid falls by gravity alone. The pressure is constant everywhere in the flow field. For the fluid falling between two parallel vertical walls, generate an expression for the volume flow rate per unit width (V·/L) as a function of ?, ? , h, and g. Compare your result to that of the same fluid falling along one vertical wall with a free surface replacing the second wall, all else being equal. Discuss the differences and provide a physical explanation.
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