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bottom of the relatively greater friction than in the ultra tall ugg liquid ugg classic mini sale come into contact with cylinder wall and other parts the tea should be big, this is because the rotation of the liquid surface a bottom parallel. at the same time, air and rotating liquid on the surface of the friction is the smallest, which makes the liquid motion to be faster. therefore the higher the surface pressure and mini ugg boot low pressure at the bottom there is gradient between. this leads to the formation of circulation, that is under the effect of stirring ugg bailey boots the liquid in the surface outward movement, and then near the cylinder wall in the tea down, and inward along the mug at the end of the last upward back center the surface like tea leaves, gravel such particles carried bycirculation and finally the center of the bottom of the mug to there is pressure from the lowest place. gravity also plays a part role ugg uk gathered at the bottom of the liquid will not mug piles and to maintain the movement along the axis of rotation from a mug at the bottom of upward mobility at this point heavier particles in the low-pressure and the combined effects of earth's gravity pull, and be stranded at the bottom. physics, the role of the classic tall uggs accumulation of such particles is called the boundary layer effect. mug rough underside was a key factor in inducing this nature if you find a more smooth contain with a cup in the kitchen than a smaller friction, you see the effect will be greatly reduced