Also, the discharge power is usually known, whereas the electrode potential is often not. In these cases, a given voltage excitation could produce two different solutions depending on the initial conditions but with a fixed power, only one physical solution exists.
This allows the contacts and terminals to be driven directly with a fixed power rather than a fixed voltage, which is important not only for numerical stability but also for discharges where an alpha-to-gamma transition occurs. Integrals performed over both the extra dimension and the base geometry can be used in the equations themselves.DimensionĪdditionally, this new modeling approach has the following advantages: Compared to solving the problem in the time domain with COMSOL Multiphysics ®, the following speedup is observed (assuming 50,000 RF cycles before the discharge reaches its periodic steady-state solution). This novel approach maintains all the nonlinearity of the model while dramatically reducing computation time: 1D models take seconds to solve and 2D models typically take on the order of an hour for a given power input. This avoids having to solve for tens or hundreds of thousands of RF cycles, which typically takes a long time before the plasma reaches the periodic steady-state solution. The physics interface attaches an extra dimension to the underlying mathematical equations representing one RF cycle and enforces periodic boundary conditions in the aforementioned extra dimension. Instead of solving the problem in the time domain, the periodic steady-state solution is computed with a new approach. The new Plasma, Time Periodic physics interface has been added for modeling capacitively coupled plasmas (CCP) with significantly faster computation times. New Physics Interface for Modeling Capacitively Coupled Plasmas so basically i cannot use the matlab functions through livelink and i need to use the matlab variables.Īny sort of help would be appreciated.For users of the Plasma Module, COMSOL Multiphysics ® version 5.3a brings a new physics interface for modeling capacitively coupled plasmas orders of magnitude faster than before, with several new features and tutorials included to demonstrate the functionality. Also, does anyone know how i can use matlab variables in a Matlab-Simulink-Comsol interface problem where i declare a comsol variable = a time dependent matlab variable through the simulink sfunction. I am using Comsol 4.2a and matlab 2008a and when i save the changes in the Matlab m-file for the comsol model, it does not recognize the changed parameters. after I make a modification in the geometry in MATLAB script, I save the m file and open it in COMSOL, and I get this error: But I cannot do the other way around, i.e. After exporting an m file from COMSOL to Matlab, I can see the changes that I make in COMSOL's GUI are implemented in MATLAB's script. If you do not delete or modify the field, boundary conditions are correctly imported. On the other hand, if you save the m.file you can run the model directly from matlab (without using comsol again). If you know the fem structure with its fields you can modify it and then re-load in comsol (file>import>fem) where you can run the solution. Anyway, you can also export the fem structure (file>export>fem) and view the variable within the matlab workspace. If you have matlab connection to comsol, you can save the m file from comsol, modify the file in matlab and then re-load the so-modified file in comsol (file>open>.mfile).
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