Post by Sergey Yankin

🛋️ Tricky support question: How to postprocess the COMSOL solution in the product space? Several COMSOL interfaces offer the option to solve in both the base geometry and the extra dimension, i.e., in the product space. An incredibly cool example is the Plasma, Time Periodic interface that allows for handling complex nonlinear capacitively-coupled plasma problems via the Stationary solver in the MHz range. Under the hood, we translate time to the extra dimension and apply handy boundary conditions in there. Once calculated, the software returns by default the period-averaged results, say ptp.neav, onto the base geometry dataset. The question that may arise is how we can retrieve the instantaneous fields. There are two options. Say, in a 2D model with the base geometry dataset, we can use ptp_xdim.atxd1(0.1,ptp.ne) to plot the electron density for the given period fraction of 0.1. Furthermore, with the extra dimension dataset, we can write down comp1.atxd2(0,0,ptp.ne) to get the density vs the extra dimension coordinate for the given point, (0,0), of the base geometry.  More on these elaborate operators: https://lnkd.in/d3vy-xWT As a more user-friendly alternative, one can just run what we call the transformation Time Periodic to Time Dependent study and return to the conventional time representation. This is something you can observe in every Plasma, Time Periodic tutorial. #COMSOL #Plasma #postprocessing #ExtraDimension