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how to define three different particles?

Posted Sep 26, 2013, 2:21 a.m. EDT MEMS & Nanotechnology, Fluid & Heat, MEMS & Piezoelectric Devices, Microfluidics, Materials Version 4.3b 4 Replies

Lalitha Saravanan
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Hi all,

Am simulating a micro-sorter to sort the blood cells. I have used Particle Tracing for Fluid Flow to define my cell. I wanted to define three sizes of cells, so as to analyse how they flow and get sorted inside my micro channel. Could somebody help me to define three different diameter and particle density.

Thanks for the help

Lalitha
4 Replies Last Post Oct 2, 2013, 5:24 a.m. EDT
Lalitha Saravanan
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Posted: 1 decade ago Sep 29, 2013, 11:32 p.m. EDT
I wanted to define three(atleast two) different particle for my study.
I have tried using

particle density=if(particleindex<50,1069,3900)

particle diameter= if(particleindex<50,6E-6,15E-6)

Also i have tried using some equations like this
1E-6+IF(random(particleindex)<0.5,0,2E-7)

But i could not create different kind of particles. Someone pls share your idea on this
I wanted to define three(atleast two) different particle for my study. I have tried using particle density=if(particleindex
Lalitha Saravanan
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Posted: 1 decade ago Oct 1, 2013, 4:45 a.m. EDT
Would any question be ever responded in this forum?
or Is that I have asked a absurd question?
Would any question be ever responded in this forum? or Is that I have asked a absurd question?
Jesus Lucio
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Posted: 1 decade ago Oct 2, 2013, 5:17 a.m. EDT
Hi,

Don't say that nobody answers the questions, please. But you can try to answer other's questions. We, people here, try to participate, although we could do more ...

Your question is not absurd, but surely most of us are interested in other topics.

Why you simply don't add more "Particle Tracing for Fluid Flow" nodes? It seems that each node is for only one particle. You know: go to your model node, right click and choose: "Add Physics". You can add as many "Particle Tracing for Fluid Flow" nodes as you need, one per each particle.

There is a related thread: www.comsol.com/community/forums/general/thread/32626/
Hi, Don't say that nobody answers the questions, please. But you can try to answer other's questions. We, people here, try to participate, although we could do more ... Your question is not absurd, but surely most of us are interested in other topics. Why you simply don't add more "Particle Tracing for Fluid Flow" nodes? It seems that each node is for only one particle. You know: go to your model node, right click and choose: "Add Physics". You can add as many "Particle Tracing for Fluid Flow" nodes as you need, one per each particle. There is a related thread: http://www.comsol.com/community/forums/general/thread/32626/
Lalitha Saravanan
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Posted: 1 decade ago Oct 2, 2013, 5:24 a.m. EDT
Hi Jesus Lucio,

Since am a new user of comsol, I felt i cant proceed further without someone's help.
Anyways, thanks for your suggestion and let me try doing that

Regards,
Lalitha
Hi Jesus Lucio, Since am a new user of comsol, I felt i cant proceed further without someone's help. Anyways, thanks for your suggestion and let me try doing that Regards, Lalitha

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