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Search took 0.00 seconds. Search: Posts Made By: anzillo
Forum: Main CFD Forum December 15, 2013, 10:56
Replies: 32
Views: 4,227
Posted By anzillo
Yes, I have started changing the code to satisfy ...

Yes, I have started changing the code to satisfy

sum( sin(h*kx)/h * ux ) = 0

and obtain u,v,w in spectral space. Then I will convert these into physical space for my simulations. I know it is...
Forum: Main CFD Forum December 15, 2013, 10:47
Replies: 32
Views: 4,227
Posted By anzillo
So, I can use the velocity field generated with...

So, I can use the velocity field generated with Rogallo's code after converting it to physical space for a normal simulation?

I would then expect the field to readjust itself (to a possibly lower...
Forum: Main CFD Forum December 15, 2013, 10:39
Replies: 32
Views: 4,227
Posted By anzillo
Thank you very much :) I will try to edit the...

Thank you very much :)
I will try to edit the code to satisfy the 'sine' condition you mentioned.
Forum: Main CFD Forum December 15, 2013, 08:22
Replies: 32
Views: 4,227
Posted By anzillo
Hello Praveen Thank you for your reply....

Hello Praveen

Thank you for your reply. However, I still did not understand whether it converting Rogallo's spectral field into a divergence free field in physical space is possible or not.

I...
Forum: Main CFD Forum December 14, 2013, 21:12
Replies: 32
Views: 4,227
Posted By anzillo
Hello Reza I tried using the code that you...

Hello Reza

I tried using the code that you gave me. It does indeed help make enforce the conjugate symmetry. However, I noticed that using ifftn (in MATLAB) with 'symmetric' defining the type of...
Forum: Main CFD Forum October 24, 2013, 05:50
Replies: 32
Views: 4,227
Posted By anzillo
Hello Reza I had another question regarding...

Hello Reza

I had another question regarding the 3D field generated with Rogallo's code and would be very thankful if you could help me.

The spectrum of the velocity field that the code...
Forum: Main CFD Forum October 18, 2013, 10:53
Replies: 32
Views: 4,227
Posted By anzillo
Thank you ! I will try to run it :)

Thank you !
I will try to run it :)
Forum: Main CFD Forum October 18, 2013, 10:17
Replies: 32
Views: 4,227
Posted By anzillo
Hello Thank you for the explanation. As...

Hello

Thank you for the explanation. As advised, I will go through some notes on FFT.

Regards
Forum: Main CFD Forum October 18, 2013, 09:47
Replies: 32
Views: 4,227
Posted By anzillo
Hello Reza I modified the code to generate a...

Hello Reza

I modified the code to generate a 2D field that satisfies the continuity equation in wavenumber space, i.e. kx*ux + ky*uy = 0;

The field is indeed isotropic and divergence free (to...
Forum: Main CFD Forum October 16, 2013, 10:18
Replies: 32
Views: 4,227
Posted By anzillo
Thank you for your response. I agree that...

Thank you for your response.

I agree that turbulence is 3-D in nature. However, there are few numerical tests conducted on the decay of 2-D turbulence. I just wanted to verify a 2-D code and thus...
Forum: Main CFD Forum October 16, 2013, 07:45
Replies: 32
Views: 4,227
Posted By anzillo
Hello Thank you for the information on...

Hello

Thank you for the information on Rogallo's code. I would be thankful if you could tell me how can I modify the code to generate a 2D field instead of the 3D field that the code is supposed...
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