| 词汇 | example_english_chute |
| 释义 | Examples of chuteThese examples are from corpora and from sources on the web. Any opinions in the examples do not represent the opinion of the Cambridge Dictionary editors or of Cambridge University Press or its licensors. The medium-grained sandstone bodies are probably gully or chute fills, caught on the shelf edge as a current passed overhead. It is this portion of the apparatus that enables us to control the state of the particulate material as it enters the chute. With dense entry conditions acceleration to the fully developed flow was apparently complete quite near the top of the chute. These configurations will be referred to as the smooth chute and the rough chute, respectively. These were taken 91.5 cm downstream from the chute entry, with the tip of the probe flush with the surface of the lateral wall. In the rough chute the loose entry condition branches for different inclinations lie so close together as to be almost indistinguishable if superimposed. This is, perhaps, to be expected in view of the larger resistance t o slip a t the base of the rough chute. Angles of wall friction are quoted for both the smooth and the rough chute bases. Velocities are high throughout the layer and, in particular, the slip velocity a t the base of the chute is large. These probes were also used to measure free-surface velocities along the chute. Annular shear cells and inclined chute flows are the two flow geometries most suitable for comparison with theoretical predictions. If the gate valve is then opened, the material enters the chute in a dense, slowly moving state. For the smooth chute in no case was anything resembling the loose entry branch predicted. In our experiments 6 was measured by a clinometer attached to the chute. This consists of an upper supply hopper which feeds the chute through a pre-chute chamber. For these 'dense entry condition flows', in which the slide valve remains open, the mass flux into the chute is controlled by the gate valve. In these circumstances a significant fraction of all collisions involve a particle and the base of the chute, rather than a pair of particles. With loose entry conditions the flow collapses into the dense entry mode before leaving the chute, over the whole range of feed rates tested. Though the presence of these walls undoubtedly influences the quantitative results, the solution obtained here is onedimensional, corresponding to a chute of infinite width. The response was operationally defined as the first object the child sent down the chute. However, in all the results reported here, the observed properties of the flowing layer were constant, within the accuracy of the measurements, from the midpoint of the chute on. These examples are from corpora and from sources on the web. Any opinions in the examples do not represent the opinion of the Cambridge Dictionary editors or of Cambridge University Press or its licensors. |
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