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What does "+=" mean in COMSOL equations?

Posted 2024年9月14日 GMT+2 20:47 Equation-Based Modeling Version 6.2 1 Reply

Robert Bruss
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Hi! I wanted to quickly ask what the += symbol means that shows up in the equations of a few physics nodes in the semiconductor module (i.e. dissipation, electron potential energy). Is it similar to programming? So that A += dA/dt would mean A = A + dA/dt? I've provided an image of it showing up in the equation for a dissipation node for the schrödinger equation here.

Thanks for your time!

Edit: Unfortunately it appears to me that my image isn't loading in. Here is the URL of the uploaded image https://imgur.com/a/3RAP7yU

But I can also just write it out here: where Number of wave function components

1 Reply Last Post 2024年9月16日 GMT+2 13:59
Lipeng Liu COMSOL Employee

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Posted: 7 months ago 2024年9月16日 GMT+2 13:59

Hi Robert,

Thanks for your question! Yes, the += symbol in COMSOL Multiphysics functions similarly to its usage in programming—it indicates that the term on the right-hand side is added as a contribution to the existing value.

Regards, Lipeng

Hi Robert, Thanks for your question! Yes, the += symbol in COMSOL Multiphysics functions similarly to its usage in programming—it indicates that the term on the right-hand side is added as a contribution to the existing value. Regards, Lipeng

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