Initial Condition and geometry doubts
Posted: Mon Sep 23, 2019 10:13 pm
Hi Developers,
1. When creating mesh, I see error due to interference of geometry. The software says the coordinates where the error is occurring. But is there any way I can visualize at which point the error is occurring using any software such as Paraview or Meshmixer? I would like to make some modifications to the geometry to correct the error, provided it doesn't alter the geometry drastically.
2. For inlet flow conditions, we specify the number of Fourier modes and documentation recommends 10 Fourier modes for pulsatile flow. But is there a possibility for the curve fitting to blow up for any specific number of fourier modes? I have tried curve fitting my inlet flow profile on Matlab curve fitting tool and sometimes at the ends, the profile blows up (tends to +/- infinity). Is this also possible in Simvascular since we are not able to see how the curve fitting looks like for a specified fourier mode number? (see attached pictures from Matlab for the problem I am referring)
For 7 fourier modes:
For 8 fourier modes:
3. Is it possible for Simvascular developer to show a graph how the curve fitting looks like for a particular number of fourier modes? This can help the user determine sufficient number of modes to use.
4. What is the maximum number of fourier modes that can be used? Is there a limit? I tried using 12 for one of my simulation (wonder if this caused any error)
5. When should we use "Flip normal" option in Prescribed Velocities BC? I don't see any way to see the profile on the software to determine whether to use this option! (I'm not sure if my interpretation of this option is correct)
Thank you for your patience in assisting the users!
Best,
Nishanth
1. When creating mesh, I see error due to interference of geometry. The software says the coordinates where the error is occurring. But is there any way I can visualize at which point the error is occurring using any software such as Paraview or Meshmixer? I would like to make some modifications to the geometry to correct the error, provided it doesn't alter the geometry drastically.
2. For inlet flow conditions, we specify the number of Fourier modes and documentation recommends 10 Fourier modes for pulsatile flow. But is there a possibility for the curve fitting to blow up for any specific number of fourier modes? I have tried curve fitting my inlet flow profile on Matlab curve fitting tool and sometimes at the ends, the profile blows up (tends to +/- infinity). Is this also possible in Simvascular since we are not able to see how the curve fitting looks like for a specified fourier mode number? (see attached pictures from Matlab for the problem I am referring)
For 7 fourier modes:
For 8 fourier modes:
3. Is it possible for Simvascular developer to show a graph how the curve fitting looks like for a particular number of fourier modes? This can help the user determine sufficient number of modes to use.
4. What is the maximum number of fourier modes that can be used? Is there a limit? I tried using 12 for one of my simulation (wonder if this caused any error)
5. When should we use "Flip normal" option in Prescribed Velocities BC? I don't see any way to see the profile on the software to determine whether to use this option! (I'm not sure if my interpretation of this option is correct)
Thank you for your patience in assisting the users!
Best,
Nishanth