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issue of convergence study #20
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Hi Yang, Which Bioinspiration & Biomimetics paper are you referring? The original IB2d? In general you will also need to scale the stiffness parameters on the fiber models when you change grid resolutions. For example: %-------------------------------------------------------- |
Hi Nick, Thank you for your response. Yes, I am referring to the original IB2d paper published in 2017. I tested the fixed cylinder case for convergence study. I found that the convergence can be verified on the matlab version. However, for the python version, basically the result is dependent on the mesh resolution. For example, the drag force on the |
I tried to modify the stiffness for different resolution, and slight difference can be observed, but the drag force on the 512 * 512 resolution is still about twice as that on the 256 * 256 resolution. |
I also noticed that tanh function is frequently used for prescribed motion, is it adopted for compatible with the periodic BC? |
Dear Yang, Thanks for providing the plot. I still have the data from that manuscript on a hard drive in my office. When I return back to my office I'll look into the specific details. However, that won't be for another a few weeks. Thanks for your patience. |
Dear Yang, What is your email address? It will be easier to communicate through email, I think. Thanks! |
@nickabattista I am still struggling with the convergence issue, could you please give me some help? Thanks in advance. |
Hi Nick,
I am trying to reproduce the convergence analysis in your Bioinspiration & Biomimetics paper. I tried three sets of meshes: 256256, 512512, 1024*1024. However, the discrepancies of the results on these three meshes are large. I just changed Nx and Ny for each mesh. I don't know if there are any other parameters need to be changed for different cases, and I hope you can help me on this.
Thanks in advance,
Yang
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