| 查看: 537 | 回复: 7 | |||
| 当前主题已经存档。 | |||
[交流]
viscous dissipation如解解释？
|
|||
| viscous dissipation如解解释？ |
回复此楼» 猜你喜欢
无聊看看filecode
已经有8人回复
-
27年博士招生信息
已经有5人回复
-
求推荐期刊，重谢
已经有4人回复
-
无聊看看时间戳打发时间
已经有5人回复
-
有机能跨方向申博吗
已经有3人回复
-
求助！！
已经有4人回复
-
kh550接枝Sio2失败求助
已经有3人回复
-
职称论文投稿
已经有12人回复
-
反应求助
已经有6人回复
-
基于自然哲学类比的风化壳型稀土矿
已经有16人回复
2楼2007-12-27 13:16:35
lihx_susan
金虫 (正式写手)
- 翻译EPI: 1
- 应助: 3 (幼儿园)
- 金币: 2073.2
- 帖子: 454
- 在线: 33.8小时
- 虫号: 481622
- 注册: 2007-12-18
- 性别: MM
- 专业: 生物化工与食品化工
3楼2007-12-27 16:18:57
xhzyyangyang
木虫 (正式写手)
- 应助: 0 (幼儿园)
- 金币: 3687.7
- 红花: 1
- 帖子: 724
- 在线: 4.5小时
- 虫号: 451858
- 注册: 2007-11-05
- 性别: MM
- 专业: 新药研发，申请国家项目资
4楼2007-12-27 21:12:21
5楼2007-12-30 09:27:43
vbxn
木虫 (正式写手)
- 应助: 1 (幼儿园)
- 金币: 11832.3
- 红花: 1
- 帖子: 879
- 在线: 232.2小时
- 虫号: 51040
- 注册: 2004-07-15
- 性别: GG
- 专业: 外国语言
粘性耗散; 粘滞耗散(下面为英文释意）
|
dissipation—(Also called viscous dissipation.) In thermodynamics, the conversion of kinetic energy into internal energy by work done against the viscous stresses. Sometimes the rate of conversion per unit volume is meant. If the Navier–Stokes equations of viscous flow are employed, Rayleigh's mathematical expression for the rate of viscous (or frictional) dissipation per unit volume is where μ is the dynamic viscosity. The Navier–Stokes assumptions thus satisfy the primary requirement of the second law of thermodynamics that the rate of dissipation be positive and the process irreversible. In a turbulent fluid, which the atmosphere usually is, dissipation is the end result of the turbulent scale process, by which kinetic energy is transferred from its originating, or outer, scale to the dissipation scales by nonlinear dynamical interactions. Most dissipation occurs at scales near the Kolmogorov microscale λd, given by where ν is the kinematic viscosity and ε is the rate of energy dissipation per unit mass. See also stress tensor, energy equation. Brunt, D., 1941: Physical and Dynamical Meteorology, 285–286. |
6楼2007-12-30 12:33:47
7楼2008-01-02 19:19:05
8楼2008-01-03 08:20:55