| 词汇 | shear-stress |
| 释义 | BETA shear stresscollocation in Englishmeanings of shearand stressThese words are often used together. Click on the links below to explore the meanings. shear noun[ U ] uk /ʃɪər/ us /ʃɪr/ movement in the plates in the surface of the earth that causes them to change shape ... See more at shear stress noun uk /stres/ us /stres/ great worry caused by a difficult situation, or something that causes ... See more at stress Examples of shear stressshear stress Osteoblasts respond to various mechanical forces, including mechanical strain and fluid-induced shearstress. The lattice model provides an interval for values of an external shearstress associated with a stable equilibrium of this system. This means that in case of simple shear flow, the shearstress increases with increasing shear rate. Numerical results provide upper and lower bounds for the critical shearstress. Since it is driven at the interface, the energy for the flow comes from the work done by the perturbation surface shearstress. The interfacial shearstress is proportional to the square of the difference of the average layer velocities. The technique was also used to determine an empirical relation describing the rise in wall shear stress due to compressibility effects in impinging high-velocity jets. The time-mean velocity gradient at the wall is slightly larger than in the steady case resulting in a larger time-mean wall shearstress. The dashed line represents the maximum shearstress value as calculated from equation (2.32). These higher derivatives stem originally from the expressions (3.13) and (3.14) for the fluctuating wall pressure and shearstress respectively. As indicated by the bifurcation diagram (figure 3), the model system predicts zero value for turbulent shearstress in these cases. The film is bounded above by a gas which exerts a shearstress 7t on the interface. For instance, the isotropic eddy viscosity hypothesis does not predict the observed fact that the shearstress and mean velocity gradient vectors have different directions. Since the shearstress is continuous across the interface with h 4 1, there naturally occurs a vorticity jump across the interface. The lower value of a1 indicates that the boundary layer is less efficient in extracting shearstress from a given amount of turbulent kinetic energy. 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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