大家好，Fluent中FFT分析

Tragedy

大家好，我用Fluent读入刚计算完毕生成的 dat文件，点击 plot FFT 后，弹出窗口提示： progress-and-plot: negative time-steps! 点击 OK 后，又弹出： do plots: no data points in range.

请教高手：时间步上哪里出错了，什么原因造成的，怎样才能画出 FFT 的曲线来？

不甚感激！

Fluent进行的非定常计算  时间步长是1e-5

Tragedy

这是那个dat文件

谢谢

Tragedy

"Convergence history of Static Pressure on b (in SI units)"
"Flow Time" "Vertex Average Static Pressure"
9.9999997e-06 16892.098
9.9999997e-06 16892.086
9.9999997e-06 16892.074
9.9999997e-06 16892.063
9.9999997e-06 16892.049
9.9999997e-06 16892.037
9.9999997e-06 16892.025
9.9999997e-06 16892.014
9.9999997e-06 16892.002
9.9999997e-06 16891.99
9.9999997e-06 16891.979
9.9999997e-06 16891.965
9.9999997e-06 16891.955
9.9999997e-06 16891.941
9.9999997e-06 16891.928
9.9999997e-06 16891.916
9.9999997e-06 16891.902
9.9999997e-06 16891.891
9.9999997e-06 16891.879
9.9999997e-06 16891.865
9.9999997e-06 16891.854
1.9999999e-05 16891.854
1.9999999e-05 16891.84
1.9999999e-05 16891.826
1.9999999e-05 16891.814
1.9999999e-05 16891.801
1.9999999e-05 16891.787
1.9999999e-05 16891.775
1.9999999e-05 16891.762
1.9999999e-05 16891.748
1.9999999e-05 16891.736
1.9999999e-05 16891.723
1.9999999e-05 16891.709
1.9999999e-05 16891.697
1.9999999e-05 16891.684
1.9999999e-05 16891.672
1.9999999e-05 16891.658
1.9999999e-05 16891.646
1.9999999e-05 16891.633
1.9999999e-05 16891.621
1.9999999e-05 16891.609
1.9999999e-05 16891.596
2.9999999e-05 16891.596
2.9999999e-05 16891.584
2.9999999e-05 16891.572
2.9999999e-05 16891.559
2.9999999e-05 16891.545
2.9999999e-05 16891.533
2.9999999e-05 16891.521
2.9999999e-05 16891.51
2.9999999e-05 16891.498
2.9999999e-05 16891.486
2.9999999e-05 16891.475
2.9999999e-05 16891.463
2.9999999e-05 16891.451
2.9999999e-05 16891.439
2.9999999e-05 16891.428
2.9999999e-05 16891.416
2.9999999e-05 16891.404
2.9999999e-05 16891.395
2.9999999e-05 16891.383
2.9999999e-05 16891.371
2.9999999e-05 16891.361
3.9999999e-05 16891.361
3.9999999e-05 16891.352
3.9999999e-05 16891.34
3.9999999e-05 16891.328
3.9999999e-05 16891.316
3.9999999e-05 16891.309
3.9999999e-05 16891.297
3.9999999e-05 16891.287
3.9999999e-05 16891.275
3.9999999e-05 16891.266
3.9999999e-05 16891.256
3.9999999e-05 16891.246
3.9999999e-05 16891.236
3.9999999e-05 16891.227
3.9999999e-05 16891.217
3.9999999e-05 16891.207
3.9999999e-05 16891.197
3.9999999e-05 16891.188
3.9999999e-05 16891.178
3.9999999e-05 16891.168
3.9999999e-05 16891.16
4.9999999e-05 16891.16
4.9999999e-05 16891.15
4.9999999e-05 16891.141
4.9999999e-05 16891.131
4.9999999e-05 16891.123
4.9999999e-05 16891.113
4.9999999e-05 16891.104
4.9999999e-05 16891.096
4.9999999e-05 16891.086
4.9999999e-05 16891.076
4.9999999e-05 16891.07
4.9999999e-05 16891.061
4.9999999e-05 16891.051
4.9999999e-05 16891.043
4.9999999e-05 16891.035
4.9999999e-05 16891.025
4.9999999e-05 16891.018
4.9999999e-05 16891.008
4.9999999e-05 16891
4.9999999e-05 16890.992
4.9999999e-05 16890.984


不知道为什么文件传不上来

jimee_lzj

应该一个时间步对应一个点压力值

Tragedy

回复 4 # jimee_lzj 的帖子

谢谢你 已经解决了~

不甚感激