| 5 | 1/1 | 返回列表 |
| 查看: 7427 | 回復: 18 | |||
| 當前只顯示滿足指定條件的回帖,點擊這里查看本話題的所有回帖 | |||
[交流]
Turbulence intensity湍流強度的設置對模擬結果的影響
|
|||
|
在模擬湍流的時候,需要設置turbulence intensity 我想和大家討論一下,如果最開始turbulence intensity 設置的不對,或者turbulence intensity 無法估算(比如說回流產生的情況) 如果計算的時間足夠的長,是否對最后的結果也沒有什么影響? 希望各位達人解惑。 |
» 搶金幣啦!回帖就可以得到:
+2/128
+2/114
+1/86
+1/86
+1/68
+1/53
+1/46
+1/35
+1/33
+1/25
+1/16
+1/14
+1/11
+1/8
+1/7
+1/5
+1/4
+2/4
+1/4
+1/4
|
從上面的描述來看,因為 turbulence intensity The relationship between the turbulent kinetic energy, k, and turbulence intensity, I, is k =3/2(Uavg*I)^2 If you know the turbulence length scale, l, you can determine Turbulent Dissipation Rate e from the relationship e = (C^3/4*k^3/2)/l turbulence intensity實際上是用來估算k和的e,所以即使開始turbulence intensity設置的不準 如果是非穩(wěn)態(tài)計算,計算時間足夠長,對最后結果也不會產生太大影響 |
|
我從fluent的user guide 上找到了答案: 1. For flows using one of the k-e models, one of the k-w models, or the RSM, the converged solutions or (for unsteady calculations) the solutions after a sufficiently long time has elapsed should be independent of the initial values for k and e (or k and w). 2. For better convergence, however, it is beneficial to use a reasonable initial guess for k and e (or k and e). In general, it is recommended that you start from a fully-developed state of turbulence.When you use the enhanced wall treatment for the k- models or the RSM, it is critically important to specify fully-developed turbulence fields. |
| 最具人氣熱帖推薦 [查看全部] | 作者 | 回/看 | 最后發(fā)表 | |
|---|---|---|---|---|
|
[考研] 277調劑 +5 | 自由煎餅果子 2026-03-16 | 6/300 |
|
|---|---|---|---|---|
|
[考研] 材料工程專碩調劑 +5 | 204818@lcx 2026-03-17 | 5/250 |
|
|
[考研] 考研化學學碩調劑,一志愿985 +4 | 張vvvv 2026-03-15 | 6/300 |
|
|
[考研] 274求調劑0856材料化工 +13 | z2839474511 2026-03-11 | 14/700 |
|
|
[考研] 085600材料與化工 +4 | 安全上岸! 2026-03-16 | 4/200 |
|
|
[論文投稿] 有沒有大佬發(fā)小論文能帶我個二作 +3 | 增銳漏人 2026-03-17 | 4/200 |
|
|
[文學芳草園] 伙伴們,祝我生日快樂吧 +17 | myrtle 2026-03-10 | 26/1300 |
|
|
[考研] 環(huán)境工程調劑 +6 | 大可digkids 2026-03-16 | 6/300 |
|
|
[考研] 一志愿211 0703方向310分求調劑 +3 | 努力奮斗112 2026-03-15 | 3/150 |
|
|
[考研] 0703一志愿211 285分求調劑 +5 | ly3471z 2026-03-13 | 5/250 |
|
|
[考研] 070303一志愿西北大學學碩310找調劑 +5 | d如愿上岸 2026-03-12 | 8/400 |
|
|
[考研] 265求調劑 +4 | 威化餅07 2026-03-12 | 4/200 |
|
|
[基金申請] 現(xiàn)在如何回避去年的某一個專家,不知道名字 +3 | zk200107 2026-03-12 | 6/300 |
|
|
[考研] 【考研調劑求收留】 +3 | Ceciilia 2026-03-11 | 3/150 |
|
|
[考研] 301求調劑 +6 | Liyouyumairs 2026-03-11 | 6/300 |
|
|
[考研] 328化工專碩求調劑 +4 | 。,。,。,。i 2026-03-12 | 4/200 |
|
|
[考研] 308求調劑 +3 | 是Lupa啊 2026-03-12 | 3/150 |
|
|
[考研] 289求調劑 +3 | 李政瑩 2026-03-12 | 3/150 |
|
|
[考研] 化工學碩306求調劑 +9 | 42838695 2026-03-12 | 9/450 |
|
|
[考研] 大連大學化學專業(yè)研究生調劑 +3 | 琪久. 2026-03-10 | 8/400 |
|