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Flapping wing along inclined hovering (Flaping wing) Dynamic mesh

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Old   May 12, 2016, 06:32
Default Flapping wing along inclined hovering (Flaping wing) Dynamic mesh
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Arun raj.S
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Hi everyone,

I am simualting dragonfly motion. I want to use structured mesh around the aerfoil. But i did so many tries but I am not able to succeed using CG-MOTION. It is mainly due to the interface. Shadow of the interface (interface2) stays in the same place but the other interface move with the inner body. Both interface and shadow are not moving together. Please let me know what is the problem. I can give all the details u want.

I am using smoothing, remeshing for the outer domain. My udf is working but I dont knw what to do at the interface.

Smoothing = 0, remeshing accourding to mesh size. I followed the instructions in the tutorial. I dont know how he did, but this video shows that in fluent we can use dynamic mesh and interface

https://www.youtube.com/watch?v=01hOD68DxrM

x(t) = (Ao/2)*(1+cos(2*pi*f*t)*(cos(beta))
y)(t) = (Ao/2)*(1+cos(2*pi*f*t)*(sin(beta))
alpha(t) = alphao+B sin(2*pi*f*t)
Ao=2.5 cm
B=pi/4
alphao=pi/4
f=40 Hz
beta = 60 degree


I have differentiated the above function and applied in the udf

vel[0] = - A0/2 * 2*pi*f*cos(beta)*sin(2*pi*f*t)
vel[1] = - A0/2 * 2*pi*f*sin(beta)*sin(2*pi*f*t)
omega[2]= B *2*pi*f*cos(2*pi*f)
Attached Images
File Type: jpg Domain.jpg (63.3 KB, 31 views)
File Type: jpg Mesh and dynamic mesh settings.jpg (144.5 KB, 39 views)
Attached Files
File Type: c second.c (1.1 KB, 16 views)
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Old   May 14, 2016, 02:59
Default Steps followed for flapping wing and interface error
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Arun raj.S
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Hi everyone,

I have tried so many times but not able to succeed. So I have prepared a pdf (as followed in the below link) containing all the steps I followed for my simulation. I have attached my UDF also. Kindly someone let me know the reason why this is happening Thank you once again.

https://drive.google.com/file/d/0B7L...ew?usp=sharing
https://drive.google.com/file/d/0B7L...ew?usp=sharing
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File Type: c second.c (1.1 KB, 13 views)
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Old   May 19, 2021, 18:32
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Quote:
Originally Posted by arunraj View Post
Hi everyone,

I have tried so many times but not able to succeed. So I have prepared a pdf (as followed in the below link) containing all the steps I followed for my simulation. I have attached my UDF also. Kindly someone let me know the reason why this is happening Thank you once again.

https://drive.google.com/file/d/0B7L...ew?usp=sharing
https://drive.google.com/file/d/0B7L...ew?usp=sharing
I would like some advice about this problem I would like to use moving mesh or dynamic mesh with UDF for Morphing Airfoil I don't know how to use it. Please give me some advice. I'm student and leaning to this project I don't look your link on sharing would you please to sent to me at my E-mail? : agisan.r@gmail.com



Sittisak. Thank you very much.
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