Hi Xiangjun,
Are you sure you are using the direct solver? The Number of steps should not matter (I think). Can you share your XML settings?

Cheers, Stan

18 lut 2022 09:54 shan xiangjun <x_j_shan@outlook.com> napisał(a):

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Hi Everyone, 

 

For 2D direct stability analysis of Nektar + +, when raising the NumSteps, I get different eigenvectors and I'm not sure which is correct (as shown in the figure).

 

TimeStep  = 0.004                                           TimeStep = 0.004

NumSteps = 4250                                            NumSteps = 8250

 

 

Why does NumSteps affect the results and how do I set its value?

 

Looking forward to your reply!

 

Best regards,

 

Xiangjun Shan

 

 

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