Point Charge
Hello all I want to define point charges (lets say some circles as positive Or negative charges) in Comsol. Can anybody give me some idea how i can do this? what I have in my mind is: define a constant...
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Hi I'm not sure I get it fully in my 4.2a "ES" physics I have, for 3D: Space, Surface, Edge and Point charge (density) nodes to apply, and in 2D: Space, Surface and Line charge (density) nodes for...
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Dear Ivar I used those option but it seems something is wrong! Lets say I have 2 charges (one negative and one positive) and I want to use arrow plots to show that they are attracting to each other. I...
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One way to define charge is through potential. This model might be helpful: www.comsol.com/showroom/gallery/211/
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Thanks a lot! That link and Ivar's descriptions helped me a lot and now the problem is solved. Best Bahareh
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I am also trying to simulate a simple two point charges, with one +ve and other -ve charges. In 2D model, I tried applying surface charge density, space charge density and line charge (out-of-plane). I...
View ArticleRe: Point Charge
I am also trying to simulate a simple two point charges, with one +ve and other -ve charges. In 2D model, I tried applying surface charge density, space charge density and line charge (out-of-plane). I...
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Hi indeed you need to mesh the domain around your point charges, and give them some material info, but vacuum or air is not that much dfferent, but still its not the same as a "void" By the way in 2D a...
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Thanks, Ivar. Your advise was helpful. Attached is an image of what I wanted to achieve. Thanks!
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Hi you should manage, in 2D try adding under "point" the line charge and give a + and a _ sign that should work. I'm off line for a weeks time so I cannot make an example (I'm not carrying my COMSOL WS...
View ArticleImage field of a charge on top of a conducting plane
Hi, I was interested in finding image force on a charged particle near a conducting rod in comsol. Therefore as an initial check i simulated a charge near a conducting plate and compared the resulting...
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