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Assigning a function to an Electric Potential boundary

Posted 13 janv. 2020, 05:39 UTC−5 Electromagnetic Heating, Low-Frequency Electromagnetics 1 Reply

Carolien de Vreugd
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Hello,

I am currently making a model using the Electric Currents and the Bioheat Transfer physics. I want to assign a waveform to an electric potential: In stead of a continue 2000 V boundary I want the function [2000e^(-(t/tau-0.003))^2)] assigned to it. When I inserted this formula into the Electric potential field my simulation wouldn't finish, the convergence plot kept going up. It worked before I changed this so I am assuming this is the cause. So my question is: How do I assign a wavefunction to an electric potential?

Kind regards, Carolien

1 Reply Last Post 13 janv. 2020, 10:53 UTC−5
Edgar J. Kaiser Certified Consultant
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Posted: 5 years ago 13 janv. 2020, 10:53 UTC−5

Carolien,

you may need to add a stationary step that applies 2000V to the boundary before the time dependent step. In the time dependent step you set the initial values to the result of the first stationary step. Make sure you add a parameter t = 0 into the global parameter list to provide a correct expression for the stationary step. This t will later be overwritten by the time dependent solver. Without this the time dependent solver may not be able to master the initial step.

Cheers Edgar

-------------------
Edgar J. Kaiser
emPhys Physical Technology
www.emphys.com
Carolien, you may need to add a stationary step that applies 2000V to the boundary before the time dependent step. In the time dependent step you set the initial values to the result of the first stationary step. Make sure you add a parameter t = 0 into the global parameter list to provide a correct expression for the stationary step. This t will later be overwritten by the time dependent solver. Without this the time dependent solver may not be able to master the initial step. Cheers Edgar

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