| 查看: 559 | 回复: 7 | |||
| 当前主题已经存档。 | |||
| 【悬赏金币】回答本帖问题，作者laiyb将赠送您 9 个金币 | |||
| 当前只显示满足指定条件的回帖，点击这里查看本话题的所有回帖 | |||
[求助]
请教scale with
|
|||
|
Scaling variables work when the flow is fully turbulent and exact geometric similarity is maintained. When these two conditions are true, the effect of fluid viscosity is negligible. The flow field can be made dimensionless using a characteristic length scale and a characteristic velocity scale. Once fully developed turbulence is satisfied, dimensionless velocities scale exactly with the characteristic velocity. 请问如何理解或翻译这段话 [ Last edited by laiyb on 2008-9-18 at 16:39 ] |
回复此楼» 猜你喜欢
071000生物学调剂求助
已经有12人回复
-
考研二轮调剂
已经有7人回复
-
调剂
已经有8人回复
-
求调剂 材料与工程 324分 专硕
已经有9人回复
-
0856专硕求调剂 希望是a区院校
已经有14人回复
-
求调剂
已经有6人回复
-
268分085602化学工程调剂
已经有23人回复
-
还有化工二轮调剂的学校吗
已经有41人回复
-
考研调剂
已经有21人回复
-
材料与化工300求调剂
已经有28人回复
|
首先感谢各位，谢谢！但是觉得Scaling variables 还是不太合适。 (b) Fully turbulent flow. Scaling variables work when the flow is fully turbulent and exact geometric similarity is maintained. When these two conditions are true, the effect of fluid viscosity is negligible. The flow field can be made dimensionless using a characteristic length scale and a characteristic velocity scale. Once fully developed turbulence is satisfied, dimensionless velocities scale exactly with the characteristic velocity. In a stirred tank, this velocity is the tip speed of the impeller. Figure 2-16a shows the radial velocity profile in the discharge stream of a Rushton turbine, scaled with the tip speed of the impeller. The velocity profile is measured at three different rotational speeds and in three different fluids. All of the data collapse onto one line. In Figure 2-16b, the local dissipation, ε, below an Lightnin A310 impeller is scaled in the same way. Note that the last place to attain this scaling in the impeller discharge is the velocity peak at the tip of the impeller blades. |
8楼2008-09-19 11:58:56
2楼2008-09-18 19:10:10
3楼2008-09-18 23:01:14
4楼2008-09-19 07:45:50
