 |
 |
 |
| 24小時(shí)熱門(mén)版塊排行榜 |
- >論壇更新日志 (6332)
- >考研 (2914)
- >導(dǎo)師招生 (2484)
- >文獻(xiàn)求助 (462)
- >碩博家園 (313)
- >休閑灌水 (254)
- >蟲(chóng)友互識(shí) (234)
- >考博 (182)
- >論文投稿 (108)
- >招聘信息布告欄 (102)
- >博后之家 (82)
- >基金申請(qǐng) (64)
- >綠色求助(高懸賞) (47)
- >攻關(guān)文獻(xiàn)(高獎(jiǎng)勵(lì)) (44)
- >找工作 (29)
- >公派出國(guó) (22)
 |
 |
 |
||
 |
 |
 |
 |
 |
| 5 | 1/1 | 返回列表 |
| 查看: 2725 | 回復(fù): 12 | ||
| 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 | ||
紙鳶666管理員
|
[求助]
燃燒計(jì)算，先收斂后發(fā)散
|
|
|
我做加熱爐的燃燒模型，計(jì)算過(guò)程中收斂的挺好，在收斂快結(jié)束的時(shí)候能量方程開(kāi)始發(fā)散，然后出錯(cuò)終止。 我這個(gè)模型網(wǎng)格數(shù)多一點(diǎn)，有一百七十萬(wàn)，不知道跟網(wǎng)格數(shù)或者問(wèn)題的復(fù)雜程度有關(guān)系嗎？ 請(qǐng)高手予以解答，感激不盡~~ |
回復(fù)此樓» 猜你喜歡
材料調(diào)劑
已經(jīng)有7人回復(fù)
-
270求調(diào)劑
已經(jīng)有6人回復(fù)
-
085601材料工程找調(diào)劑
已經(jīng)有20人回復(fù)
-
266分，一志愿電氣工程，本科材料，求材料專業(yè)調(diào)劑
已經(jīng)有7人回復(fù)
-
286求調(diào)劑
已經(jīng)有14人回復(fù)
-
266分求材料化工冶金礦業(yè)等專業(yè)的調(diào)劑
已經(jīng)有7人回復(fù)
-
材料調(diào)劑
已經(jīng)有13人回復(fù)
-
求調(diào)劑推薦 材料 304
已經(jīng)有20人回復(fù)
-
805600專碩材料與化工348分求調(diào)劑
已經(jīng)有3人回復(fù)
-
295材料工程專碩求調(diào)劑
已經(jīng)有15人回復(fù)
» 本主題相關(guān)價(jià)值貼推薦，對(duì)您同樣有幫助:
- 數(shù)學(xué)分析老師課上提出的問(wèn)題（關(guān)于級(jí)數(shù)收斂與發(fā)散）
已經(jīng)有8人回復(fù)
- 【討論】一直被發(fā)散，從未見(jiàn)收斂
已經(jīng)有11人回復(fù)
huchunxia
實(shí)習(xí)版主
- 應(yīng)助: 3 (幼兒園)
- 金幣: 3929.1
- 散金: 216
- 帖子: 539
- 在線: 188.9小時(shí)
- 蟲(chóng)號(hào): 1083035
- 注冊(cè): 2010-08-27
- 專業(yè): 無(wú)機(jī)非金屬基復(fù)合材料
5樓2012-11-28 19:03:05
312367697
兌換貴賓
- 應(yīng)助: 53 (初中生)
- 金幣: 577.3
- 紅花: 2
- 帖子: 132
- 在線: 64.5小時(shí)
- 蟲(chóng)號(hào): 1388656
- 注冊(cè): 2011-09-03
- 專業(yè): 鋼鐵冶金
2樓2012-11-28 09:11:24
紙鳶666
管理員
- 應(yīng)助: 0 (幼兒園)
- 金幣: 520.2
- 散金: 200
- 帖子: 51
- 在線: 14.7小時(shí)
- 蟲(chóng)號(hào): 1303793
- 注冊(cè): 2011-05-23
- 專業(yè): 內(nèi)流流體力學(xué)
3樓2012-11-28 14:44:45
312367697
兌換貴賓
- 應(yīng)助: 53 (初中生)
- 金幣: 577.3
- 紅花: 2
- 帖子: 132
- 在線: 64.5小時(shí)
- 蟲(chóng)號(hào): 1388656
- 注冊(cè): 2011-09-03
- 專業(yè): 鋼鐵冶金
【答案】應(yīng)助回帖
★ ★ ★ ★ ★ ★
xiegangmai: 金幣+2, 謝謝參與 2012-11-28 22:03:31
紙鳶666: 金幣+4, ★★★很有幫助 2012-11-29 08:42:03
xiegangmai: 金幣+2, 謝謝參與 2012-11-28 22:03:31
紙鳶666: 金幣+4, ★★★很有幫助 2012-11-29 08:42:03
|
用Fluent算過(guò)非預(yù)混燃燒，CFX還沒(méi)試過(guò)，看看這個(gè)對(duì)你有沒(méi)有用... 9.17.1. General Procedure for Running Simulations For many cases, such as the Combustion Tutorial, the run can be started using automatic initial guesses for most fields and the choice of model in the first part of the tutorial, (EDM) is the most robust of the combustion models. If you are having trouble getting a complex problem to converge, the following steps may aid convergence: Begin by specifying a single step reaction using the Eddy Dissipation Model. For initial conditions, specify Oxygen with a mass fraction of 0.232 and set each of the other species to Automatic. Allow the problem to converge to a reasonable level. Restart the problem with Finite Rate Chemistry or Finite Rate Chemistry/Eddy Dissipation Model using the results from the previous problem as an initial guess. Restarting the flamelet model from EDM does not work well because of the different model approach. This is because a previous EDM run would not provide mixture fraction mean and variance fields. Instead, it would be better to reduce the timestep for a few iterations. Combustion introduces a strong coupling between scalars, energy and momentum. In difficult problems, you may find it helps to calculate a cold flow solution before turning on combustion. In general for the Finite Rate Chemistry Model, the time scale of the combustion process is smaller, so you may have to continue with a smaller timestep to force the mass fraction and energy equations to converge. The time scale for the Eddy Dissipation Model is equal to the turbulence time scale (k/e). In some cases, it may be appropriate to use a larger time scale for the mass fraction equations. This is particularly true when there are regions of small flow velocity in the domain. In these cases, the time needed to convect the components into all areas of the domain may be relatively large. |
4樓2012-11-28 16:49:32
| 最具人氣熱帖推薦 [查看全部] | 作者 | 回/看 | 最后發(fā)表 | |
|---|---|---|---|---|
|
[考研] 310分求調(diào)劑 +4 | 成功上岸wang 2026-04-01 | 4/200 |
|
|---|---|---|---|---|
|
[考研] 316求調(diào)劑 +9 | 舟自梗 2026-04-01 | 10/500 |
|
|
|
[考研]
 一志愿廈門(mén)大學(xué)化學(xué)學(xué)碩307求調(diào)劑
+11
|
y7czhao 2026-03-26 | 11/550 |
|
|
|
[考研] 08工科275求調(diào)劑，可跨考。 +5 | AaAa7420 2026-03-31 | 5/250 |
|
|
|
[考研] 086000生物與醫(yī)藥 初試274求調(diào)劑 +5 | 小叮當(dāng)來(lái)了 2026-03-30 | 6/300 |
|
|
|
[考研] 336求調(diào)劑 +3 | kiyy 2026-04-01 | 3/150 |
|
|
|
[考研] 一志愿北交材料工程總分358 +5 | cs0106 2026-04-01 | 7/350 |
|
|
|
[考研] 070300化學(xué)279求調(diào)劑 +12 | 哈哈哈^_^ 2026-03-31 | 14/700 |
|
|
|
[考研] 土木304求調(diào)劑 +3 | 兔突突突， 2026-03-31 | 3/150 |
|
|
|
[考研] 一志愿：西北大學(xué)，英一數(shù)一408-284分求調(diào)劑 +7 | 12.27 2026-03-27 | 7/350 |
|
|
|
[考研] 一志愿南師大0703化學(xué) 275求調(diào)劑 +5 | Ripcord上岸 2026-03-27 | 5/250 |
|
|
|
[考研] 一志愿華東師范大學(xué)有機(jī)化學(xué)專業(yè)，初試351分，復(fù)試被刷求調(diào)劑! +9 | 真名有冰 2026-03-29 | 10/500 |
|
|
|
[考研] 江蘇蘇北高校誠(chéng)邀調(diào)劑同學(xué) +3 | zzll406 2026-03-31 | 3/150 |
|
|
|
[考研] 福建理工大學(xué)材料學(xué)院先進(jìn)合金團(tuán)隊(duì)招收考研調(diào)劑學(xué)生 +3 | 大華金商都 2026-03-30 | 4/200 |
|
|
|
[考研] 293求調(diào)劑 +3 | 末未mm 2026-03-30 | 5/250 |
|
|
|
[考研] 081200-11408-276學(xué)碩求調(diào)劑 +6 | 崔wj 2026-03-26 | 6/300 |
|
|
|
[考研] 316求調(diào)劑 +7 | 江辭666 2026-03-26 | 7/350 |
|
|
|
[考研] 本科新能源科學(xué)與工程，一志愿華理能動(dòng)285求調(diào)劑 +3 | AZMK 2026-03-27 | 5/250 |
|
|
|
[考研] 394求調(diào)劑 +3 | 好事多磨靜候佳?/a> 2026-03-26 | 5/250 |
|
|
|
[考研] 08開(kāi)頭275求調(diào)劑 +4 | 拉誰(shuí)不重要 2026-03-26 | 4/200 |
|