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Spheres falling in Newtonian liquids An isolated falling sphere v=2pga 9n where a is the radius of the sphere. Ap is the density difference between the spheres and the ig sity of the liquid,and Drainage down awall he hithe luntn d e and the thickness asa function of the Drainage down a wall h Att=0 Att=t At t=t 摄 at a later time t 1212 wall x h wall x ho At t=0 hx = xη gtρ at a later time t Drainage down a wall wall At t=t At t=t1 2
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