| 24小時(shí)熱門版塊排行榜 |
| 5 | 1/1 | 返回列表 |
| 查看: 7539 | 回復(fù): 18 | |||
| 當(dāng)前只顯示滿足指定條件的回帖,點(diǎn)擊這里查看本話題的所有回帖 | |||
[交流]
Turbulence intensity湍流強(qiáng)度的設(shè)置對(duì)模擬結(jié)果的影響
|
|||
|
在模擬湍流的時(shí)候,需要設(shè)置turbulence intensity 我想和大家討論一下,如果最開(kāi)始turbulence intensity 設(shè)置的不對(duì),或者turbulence intensity 無(wú)法估算(比如說(shuō)回流產(chǎn)生的情況) 如果計(jì)算的時(shí)間足夠的長(zhǎng),是否對(duì)最后的結(jié)果也沒(méi)有什么影響? 希望各位達(dá)人解惑。 |
» 搶金幣啦!回帖就可以得到:
+1/485
+1/185
+1/71
+2/58
+1/41
+1/37
+1/34
+1/30
+2/20
+1/18
+2/10
+1/9
+1/9
+1/9
+1/8
+1/8
+1/7
+1/4
+1/2
+1/2
|
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. |
|
從上面的描述來(lái)看,因?yàn)?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(shí)際上是用來(lái)估算k和的e,所以即使開(kāi)始turbulence intensity設(shè)置的不準(zhǔn) 如果是非穩(wěn)態(tài)計(jì)算,計(jì)算時(shí)間足夠長(zhǎng),對(duì)最后結(jié)果也不會(huì)產(chǎn)生太大影響 |
| 最具人氣熱帖推薦 [查看全部] | 作者 | 回/看 | 最后發(fā)表 | |
|---|---|---|---|---|
|
[考研] 309求調(diào)劑 +7 | gajsj 2026-03-25 | 8/400 |
|
|---|---|---|---|---|
|
[考研] 334分 一志愿武理-080500 材料求調(diào)劑 +11 | 李李不服輸 2026-03-25 | 11/550 |
|
|
[考研] 282求調(diào)劑 +4 | 呼吸都是減肥 2026-04-01 | 4/200 |
|
|
[考研] 生物學(xué)308分求調(diào)劑(一志愿華東師大) +3 | 相信必會(huì)光芒萬(wàn)?/a> 2026-03-31 | 3/150 |
|
|
[考研] 070300化學(xué)279求調(diào)劑 +9 | 哈哈哈^_^ 2026-03-31 | 11/550 |
|
|
[考研] 一志愿北京科技大學(xué)材料學(xué)碩328分求調(diào)劑 +4 | 1段時(shí)間 2026-03-31 | 5/250 |
|
|
[考研] 化學(xué)308分調(diào)劑 +11 | 你好明天你好 2026-03-30 | 12/600 |
|
|
[考研] 08開(kāi)頭看過(guò)來(lái)!。 +3 | wwwwffffff 2026-03-31 | 5/250 |
|
|
[考研] 求收留 +8 | 1943443204 2026-03-28 | 8/400 |
|
|
[考研] 本科211安全工程,初試290分,求調(diào)劑 +3 | 2719846834 2026-03-28 | 3/150 |
|
|
[考研] 287求調(diào)劑 +17 | land xuxu 2026-03-26 | 17/850 |
|
|
[考研] 08工科,295,接受跨專業(yè)調(diào)劑 +6 | lmnlzy 2026-03-30 | 6/300 |
|
|
[考研] 0817化工學(xué)碩調(diào)劑 +7 | 努力上岸中! 2026-03-31 | 7/350 |
|
|
[考研] 英一數(shù)一408,總分284,二戰(zhàn)真誠(chéng)求調(diào)劑 +3 | 12.27 2026-03-30 | 5/250 |
|
|
[考研] 一志愿廈門大學(xué)材料工程專碩354找調(diào)劑!! +5 | 貝唄鋇鋇 2026-03-30 | 5/250 |
|
|
[考研] 數(shù)一英一271專碩(085401)求調(diào)劑,可跨 +7 | 前行必有光 2026-03-28 | 8/400 |
|
|
[考研] 298調(diào)劑 +3 | jiyingjie123 2026-03-27 | 3/150 |
|
|
[考研] 324求調(diào)劑 +5 | hanamiko 2026-03-26 | 5/250 |
|
|
[碩博家園] 北京林業(yè)大學(xué)碩導(dǎo)招生廣告 +6 | kongweilin 2026-03-26 | 8/400 |
|
|
[考研] 化學(xué)調(diào)劑一志愿上海交通大學(xué)336分-本科上海211 +4 | 小魚(yú)愛(ài)有機(jī) 2026-03-25 | 4/200 |
|