Figure 1.4.5 (a)An example of a circulating fluid.(b)Representing a circulating flow using textures. A flow field can have more than one system of circulation centered about different points in space.In Figure 1.4.6(a)we show a flow field with two circulations.The flows are in opposite senses,and one of the circulations is stronger than the other.In Figure 1.4.6(b) we have the same situation,except that now the two circulations are in the same sense. Figure 1.4.6 A flow with two circulation centers with (a)opposite directions of circulation.(b)the same direction of circulation In Figure 1.4.7,we show a constant downward flow interacting with a counter-clockwise circulating flow.The circulating flow is able to make some headway against the downward constant flow,but eventually is overwhelmed by the strength of the “downward'flow. Figure 1.4.7 A constant downward flow interacting with a counter-clockwise circulating flow. 1-11Figure 1.4.5 (a) An example of a circulating fluid. (b) Representing a circulating flow using textures. A flow field can have more than one system of circulation centered about different points in space. In Figure 1.4.6(a) we show a flow field with two circulations. The flows are in opposite senses, and one of the circulations is stronger than the other. In Figure 1.4.6(b) we have the same situation, except that now the two circulations are in the same sense. Figure 1.4.6 A flow with two circulation centers with (a) opposite directions of circulation. (b) the same direction of circulation In Figure 1.4.7, we show a constant downward flow interacting with a counter-clockwise circulating flow. The circulating flow is able to make some headway against the downward constant flow, but eventually is overwhelmed by the strength of the “downward” flow. Figure 1.4.7 A constant downward flow interacting with a counter-clockwise circulating flow. 1-11