| 查看: 552 | 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 | |||
[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
博士自荐
已经有3人回复
-
083200 初试305分 求调剂
已经有4人回复
-
292求调剂
已经有5人回复
-
22408 270分
已经有8人回复
-
一志愿2110，化学学硕310分，本科重点双非求调剂
已经有15人回复
-
070300化学学硕311分求调剂
已经有20人回复
-
085400 328分 求调剂
已经有4人回复
-
085801 总分275 本科新能源 求调剂
已经有8人回复
-
0854调剂
已经有6人回复
-
280求调剂
已经有8人回复
2楼2008-09-18 19:10:10
3楼2008-09-18 23:01:14
4楼2008-09-19 07:45:50
masterpine
金虫 (正式写手)
- 应助: 1 (幼儿园)
- 金币: 1621.2
- 散金: 100
- 红花: 1
- 帖子: 358
- 在线: 25.7小时
- 虫号: 588349
- 注册: 2008-08-22
- 性别: GG
- 专业: 土壤生态学
5楼2008-09-19 08:31:40
6楼2008-09-19 08:42:24
money4u
至尊木虫 (著名写手)
- 翻译EPI: 26
- 应助: 0 (幼儿园)
- 金币: 12804.8
- 红花: 1
- 帖子: 1773
- 在线: 107.6小时
- 虫号: 425515
- 注册: 2007-07-27
- 性别: GG
- 专业: 物理学I
7楼2008-09-19 08:54:30
|
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
