关于脱硫塔计算出现温度超限的问题

twotwogogo · 发表于 2013-3-25 14:15:50

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计算过程中一旦加入DPM就出现 reversed flow in 45 faces on outflow 7.
number tracked = 3160, escaped = 1722, aborted = 0, trapped = 1438, evaporated = 0, incomplete = 0
50 6.8467e-02 2.0125e-03 2.2004e-03 2.2522e-03 5.7437e-08 6.1212e-03 1.8367e-02  3:13:44 1450

reversed flow in 64 faces on outflow 7.
51 6.3011e-01 8.9474e-03 2.2945e-02 8.3185e-03 1.6798e-03 6.3417e-03 1.9841e-02  2:59:02 1449

reversed flow in 42 faces on outflow 7.
temperature limited to 1.000000e+000 in 2 cells on zone 4 in domain 1
   52 6.3763e-01 9.6708e-03 2.0757e-02 9.5903e-03 1.2376e-03 2.9258e-02 6.4839e-02  2:47:16 1448

reversed flow in 29 faces on outflow 7.
temperature limited to 1.000000e+000 in 1 cells on zone 2 in domain 1
  temperature limited to 1.000000e+000 in 2416 cells on zone 4 in domain 1
   53 6.1640e-01 9.6204e-03 1.9192e-02 9.6890e-03 1.1294e-03 4.7609e-02 1.8566e-01  2:33:01 1447

a2883524 · 发表于 2013-3-25 14:53:17

蒸发量太大，呵呵，导致温度过低。或者网格质量差

a2883524 · 发表于 2013-3-25 14:54:33

原帖由 twotwogogo 于 2013-3-25 06:15 发表

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计算过程中一旦加入DPM就出现 reversed flow in 45 faces on outflow 7.
number tracked = 3160, escaped = 1722, aborted = 0, trapped = 1438, evaporated = 0, incomplete = 0
50 6.8467e-02 2.0125e-03 2 ...

楼主是北京龙源？或者是华北电大？
现在做脱硫的好像不多了？

twotwogogo · 发表于 2013-3-25 16:09:43

额。。这都被你猜到了。。。厉害。。。华电的。。那应该怎么解决呢

twotwogogo · 发表于 2013-3-25 16:26:48

粒子送少一点就能收敛，稍微加点量就出现这个问题了，是不是就是蒸发量过大的原因呢，又该怎么解决呢

twotwogogo · 发表于 2013-3-25 17:20:58

应该不是蒸发的问题，我用固体颗粒代替了液体颗粒还是出现了温度超限

a2883524 · 发表于 2013-3-25 20:28:06

固体颗粒代替液体颗粒也会超标？是不是切换固体颗粒后计算时间太短了？
你的液滴碰撞壁面的边界条件怎么设置的？

twotwogogo · 发表于 2013-3-26 12:55:29

541 9.8225e-01 7.2736e-03 7.6419e-03 7.2814e-03 3.0863e-04 1.6606e-02 3.7267e-02  1:05:39  959
542 9.6869e-01 7.0485e-03 7.5342e-03 7.1404e-03 3.0359e-04 1.6227e-02 3.6063e-02  1:05:15  958
543 9.5673e-01 6.8325e-03 7.4201e-03 7.0012e-03 3.0004e-04 1.5806e-02 3.3968e-02  1:04:54  957
544 9.4481e-01 6.6444e-03 7.3171e-03 6.8735e-03 2.9765e-04 1.5404e-02 3.1901e-02  1:04:37  956
545 9.3219e-01 6.4806e-03 7.2162e-03 6.7631e-03 2.9657e-04 1.5049e-02 3.0156e-02  1:04:22  955
546 9.2295e-01 6.3382e-03 7.1117e-03 6.6778e-03 2.9566e-04 1.4727e-02 2.8809e-02  1:04:10  954
547 9.1712e-01 6.2104e-03 7.0138e-03 6.6126e-03 2.9479e-04 1.4399e-02 2.7827e-02  1:03:59  953
548 9.1237e-01 6.0898e-03 6.9256e-03 6.5667e-03 2.9489e-04 1.4067e-02 2.7010e-02  1:03:50  952
549 9.1091e-01 5.9813e-03 6.8352e-03 6.5372e-03 2.9603e-04 1.3717e-02 2.5971e-02  1:03:41  951
number tracked = 3160, escaped = 601, aborted = 0, trapped = 2540, evaporated = 0, incomplete = 19
550 9.0789e-01 5.8840e-03 6.7445e-03 6.5240e-03 2.9742e-04 1.3363e-02 2.4987e-02  1:35:14  950
  iter continuity x-velocity y-velocity z-velocity    energy       k epsilon    time/iter
551 1.5168e+00 1.0827e-02 1.3614e-02 1.3183e-02 1.4356e-03 1.3540e-02 2.5122e-02  1:28:45  949
552 1.4316e+00 1.1003e-02 1.2828e-02 1.3060e-02 5.9695e-04 1.5687e-02 3.5712e-02  1:26:44  948
553 1.4045e+00 1.1458e-02 1.2944e-02 1.3434e-02 5.6462e-04 1.7057e-02 4.2126e-02  1:25:06  947
554 1.3849e+00 1.1849e-02 1.3285e-02 1.3839e-02 6.2026e-04 1.8288e-02 4.6117e-02  1:20:37  946
555 1.3720e+00 1.2301e-02 1.3709e-02 1.4284e-02 6.6565e-04 1.9556e-02 5.0659e-02  1:17:02  945
556 1.3643e+00 1.2777e-02 1.4176e-02 1.4762e-02 6.9676e-04 2.0647e-02 5.5761e-02  1:14:09  944
557 1.3628e+00 1.3294e-02 1.4628e-02 1.5273e-02 7.3093e-04 2.1599e-02 6.0437e-02  1:14:58  943
temperature limited to 1.000000e+000 in 15 cells on zone 3 in domain 1
558 1.3611e+00 1.3832e-02 1.5075e-02 1.5834e-02 7.7632e-04 2.2524e-02 6.5106e-02  1:12:28  942
temperature limited to 1.000000e+000 in 42 cells on zone 3 in domain 1
559 1.3610e+00 1.4410e-02 1.5553e-02 1.6409e-02 8.2619e-04 2.3486e-02 7.1951e-02  1:10:28  941
temperature limited to 1.000000e+000 in 69 cells on zone 3 in domain 1
560 1.3630e+00 1.4956e-02 1.5981e-02 1.6942e-02 8.7903e-04 2.4272e-02 7.8367e-02  1:08:51  940
temperature limited to 1.000000e+000 in 77 cells on zone 3 in domain 1
561 1.3705e+00 1.5433e-02 1.6327e-02 1.7401e-02 9.1530e-04 2.5204e-02 8.0558e-02  1:07:32  939

Interrupting...
temperature limited to 1.000000e+000 in 109 cells on zone 3 in domain 1
Done.这是换为carbon后的固体颗粒算的，还是出现了超限。这是网格