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Note: This discussion is about an older version of the COMSOL Multiphysics® software. The information provided may be out of date.

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Simulation of Van der Waals forces using Comsol v4.3

Posted 04.12.2013, 10:42 GMT-5 MEMS & Nanotechnology, MEMS & Piezoelectric Devices, Structural Mechanics Version 4.3a 4 Replies

Marc Serra
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I'm trying to simulate the attractive Van der Waals force between two nanometric structures. My initial idea was to integrate the Lennard-Jones potential created by one domain (\integral (rho/M)*(1/|r1-r2|^8-1/|r1-r2|^14)*(r1-r2)*dxdydz, however I'm not able to integrate functions that have more variables (i.e. the result of integrating this over R1 would be a function of R2). What suggestions would you have to approach this problem?

Any help would be appreciated!

Marc
4 Replies Last Post 11.06.2017, 13:46 GMT-4
Sven Friedel COMSOL Employee

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Posted: 1 decade ago 04.12.2013, 10:56 GMT-5
Hi Marc,

you would probably like to use the dest() operator. Please check out the help for it.
If it does not work out send your file here or to us in support@comsol.com

Sven
Hi Marc, you would probably like to use the dest() operator. Please check out the help for it. If it does not work out send your file here or to us in support@comsol.com Sven
Marc Serra
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Posted: 1 decade ago 09.12.2013, 16:58 GMT-5
That's exactly what I was looking for. Thank you!
That's exactly what I was looking for. Thank you!
Manyalibo Matthews
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Posted: 1 decade ago 12.09.2014, 15:51 GMT-4
Marc - I'm interested in your VdW model; did you succeed in implementing it in 4.3?

thanks,

Manyalibo
Marc - I'm interested in your VdW model; did you succeed in implementing it in 4.3? thanks, Manyalibo
Vuk Habic
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Posted: 7 years ago 11.06.2017, 13:46 GMT-4
I am as well. I am trying to model Van Der Waals forces for a RF MEMS Switch. Any nudge in the right direction would help.
I am as well. I am trying to model Van Der Waals forces for a RF MEMS Switch. Any nudge in the right direction would help.

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