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Vibrationg structure in fluid

Posted 26.03.2013, 01:08 GMT-4 Fluid & Heat, Acoustics & Vibrations, Microfluidics, Structural Mechanics 4 Replies

Monica Dee
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Hello Everyone,

This is my first project with Comsol so I have no clue about what I am doing really. My questions are most likely very simple/stupid I'm sure anyone here can help me.

What I want to do is basicly to do exactly what is done in this paper: www.comsol.com/papers/1592/

Simulation of a Vibrating Plate-based Micromixer

I couldn't find any tutorial that does have a vibrating structure interfacing with liquid. I am using 2D model FSI but I don't know how to make the plate vibrate. I guess that I need to give it sin() velosity in (y) direction, but I don't know how.

It is probably really basic but this is absolutely my first time I'm dealing with comsol so please help me.

I have done some of the basic tutorials on SFI but none of the step by step tutorials are similar to what I need.

Any information will be really really valuable to me. I really appreciate if anyone can point me to a tutorial or something that helps.

Thanks a lot,
Monica
4 Replies Last Post 16.10.2015, 00:47 GMT-4
RVN
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Posted: 1 decade ago 26.03.2013, 08:22 GMT-4
Hi Monica

Have you taken a look at the model library? There is a model on a vibrating beam in fluid flow, just search for "vibrating beam" and you should find it under Fluid-Structure Interaction.

Since this is the first model you want to do, you should start out slow. Otherwise you will just get overwhelmed and the result will suffer.
--
Hope this helps
--
/RVN
Hi Monica Have you taken a look at the model library? There is a model on a vibrating beam in fluid flow, just search for "vibrating beam" and you should find it under Fluid-Structure Interaction. Since this is the first model you want to do, you should start out slow. Otherwise you will just get overwhelmed and the result will suffer. -- Hope this helps -- /RVN
Monica Dee
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Posted: 1 decade ago 26.03.2013, 19:49 GMT-4
Hello RVN,

Thanks a lot for the reply. I tried to do that simulation and I'm able to follow it to the end, however I still don't know how to change it to fit my specifications.

Some parts of the tutorials I just followe but I didn't quite get why I did what I did.

one of my concerns is the scale I'll be modeling in microscale where as this model is in meter.

For one thing I found that in the discretization section of the module there are 3 options P1+P1, P2+P1 or P2+P3 this model uses P2+P1 (Secondorder velocity and first order Pressure). I'm not sure for my model which one I need to pick.

I was imagining to have something with fixed magnitude I need to give it sinusoidal displace ment or velosity. In this exam they we have step and Gaussian Pulse which I'm not quite getting.

I feel very confused right now.

Thanks a lot for your suggestions and help.
Monica
Hello RVN, Thanks a lot for the reply. I tried to do that simulation and I'm able to follow it to the end, however I still don't know how to change it to fit my specifications. Some parts of the tutorials I just followe but I didn't quite get why I did what I did. one of my concerns is the scale I'll be modeling in microscale where as this model is in meter. For one thing I found that in the discretization section of the module there are 3 options P1+P1, P2+P1 or P2+P3 this model uses P2+P1 (Secondorder velocity and first order Pressure). I'm not sure for my model which one I need to pick. I was imagining to have something with fixed magnitude I need to give it sinusoidal displace ment or velosity. In this exam they we have step and Gaussian Pulse which I'm not quite getting. I feel very confused right now. Thanks a lot for your suggestions and help. Monica
Wang Pengtao
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Posted: 1 decade ago 06.11.2013, 16:27 GMT-5
HI, Monica
would you mind to let me know if you are still working on this problem. I have finish this case with Prof Sun.
Peter
HI, Monica would you mind to let me know if you are still working on this problem. I have finish this case with Prof Sun. Peter
Amir Rahmani
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Posted: 9 years ago 16.10.2015, 00:47 GMT-4
Hi Wang,
I was wondering if you were successful in solving this problem. I am working on something similar. If you have been successful it would be appreciated if you would share your model.
Thanks,
Amir
Hi Wang, I was wondering if you were successful in solving this problem. I am working on something similar. If you have been successful it would be appreciated if you would share your model. Thanks, Amir

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