“average velocity”的概念、定义、翻译、参考文献-科学参考

average velocity

Chemical Engineering

Also known as the mean velocity, it is the total volumetric flow rate of a fluid per unit flow area. It is a useful parameter particularly where there may be local variations in velocity and hence flow across a flow area due to the effects of turbulence or obstructions in a pipeline, duct, or stack. The SI units are m s^–1.

Geology and Earth Sciences

The ratio of a given depth divided by the travel time to that depth, usually assuming straight ray paths and parallel layering. Thus $\bar{v}$ = z_n/t_n, where z_n is the depth of the top n layers and t_n the single-travel time through those n layers. Also, $\bar{v}$ = Σ‎z_i/Σ‎t_i where z_i and t_i are the thickness of and single-travel time through the ith layer respectively, and Σ‎ is the total thickness and total travel time respectively of the overlying layers.

单词	average velocity
释义	average velocity Chemical Engineering Also known as the mean velocity, it is the total volumetric flow rate of a fluid per unit flow area. It is a useful parameter particularly where there may be local variations in velocity and hence flow across a flow area due to the effects of turbulence or obstructions in a pipeline, duct, or stack. The SI units are m s^–1. Geology and Earth Sciences The ratio of a given depth divided by the travel time to that depth, usually assuming straight ray paths and parallel layering. Thus $\bar{v}$ = z_n/t_n, where z_n is the depth of the top n layers and t_n the single-travel time through those n layers. Also, $\bar{v}$ = Σ‎z_i/Σ‎t_i where z_i and t_i are the thickness of and single-travel time through the ith layer respectively, and Σ‎ is the total thickness and total travel time respectively of the overlying layers.
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