Current Density Calc/Plot in DC Conduction Model Classic List Threaded 6 messages Open this post in threaded view
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Current Density Calc/Plot in DC Conduction Model

 Does the FEATool equation and post processing flexibility in the DC Conduction model allow for the current density (A/m^2) to be calculated and/or plotted? -Randal
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Re: Current Density Calc/Plot in DC Conduction Model

 Administrator If an expression is not pre-defined you can most often enter and evaluate the expression manually as explained previously. randress wrote Does the FEATool equation and post processing flexibility in the DC Conduction model allow for the current density (A/m^2) to be calculated and/or plotted? -Randal
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Re: Current Density Calc/Plot in DC Conduction Model

 Ok. Current density, J = (conductivity)*E.   E = sqrt(Vx^2+Vy^2+Vz^2). How can I represent conductivity/sigma since it is not a constant for all materials but is dependent upon location (x,y,z) within the model? -Randal
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Re: Current Density Calc/Plot in DC Conduction Model

 Administrator If you are using the "Conductive Media DC" physics mode you can use the global variable name 's_dc' (short for sigma_DC). When evaluating the expression the software will take what ever value you have entered in the "Subdomain/Equation Settings" dialgo box depending on location/subdomain. You can try just plotting 's_dc' and see how it varies. randress wrote Ok. Current density, J = (conductivity)*E.   E = sqrt(Vx^2+Vy^2+Vz^2). How can I represent conductivity/sigma since it is not a constant for all materials but is dependent upon location (x,y,z) within the model? -Randal